Radio base station, mobile station and radio communication method. RU patent 2521004.
 Wireless communication device and assembly control method / 2518523Invention discloses a wireless communication device which includes: a scrambling unit (214) which multiplies a modulated response signal by a scrambling code "1" or "-1" in order to invert a plurality for each of the response signals on a cyclic shift axis; an expansion unit (215) which performs primary spectrum expansion of the response signal using a ZAC sequence established by a control unit (209); and an expansion unit (218) which performs secondary spectrum expansion of the response signal once subjected to primary expansion, using a block expanding code sequence established by the control unit (209). |
 Method of transmitting data through component carriers in mobile communication system to which carrier aggregation method is applied and corresponding apparatus / 2518155Invention relates to a mobile communication system in which a carrier aggregation scheme is used, and is aimed at facilitating data communication by modifying the connection relationship between component carriers. The invention particularly discloses a method of transmitting data through user equipment, comprising steps of: receiving a message including identifier information for modifying a connection relationship between at least one downlink component carrier and at least one uplink component carrier from a base station; receiving predetermined data through at least one downlink component carrier from the base station; and transmitting feedback data to the base station for data received through the uplink component carrier modified according to the identifier information. |
 Radio communication device and signal division method / 2516457Invention relates to communication engineering and can be used in wireless communication systems. The radio communication device reduces ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit (110), a division unit (111), and a mapping unit (112). The DFT unit (110) uses the DFT matrix to execute a DFT process on a symbol sequence in a time region to generate a signal (SC-FDMA signal) of the frequency region. The division unit (111) generates a plurality of clusters by dividing the SC-FDMA signal with a partially orthogonal bandwidth corresponding to the vector length of some of the column vectors constituting the DFT matrix used in the DFT unit (110) and orthogonally intersecting at least partially. The mapping unit (112) maps the clusters to discontinuous frequency bands. |
 Radio communication device and constellation control method / 2510577Invention discloses a radio communication device which includes a scrambling unit (214) which multiplies a response signal after modulation, by a scrambling code "1" or "e-j(π/2)" so as to rotate a constellation for each of the response signals on a cyclic shift axis; a spread unit (215) which performs a primary spread of the response signal by using a ZAC sequence set by a control unit (209); and a spread unit (218) which performs a secondary spread of the response signal after being subjected to the primary spread, by using a block-wise spread code sequence set by the control unit (209). |
 Method of arranging pilots in mobile radio communication system and transceiver applying said method / 2510136In a pilot arrangement method in a mobile radio communication system by which, in order to avoid the problem of poor CQI accuracy affecting the scheduling of channel arrangement, causing deterioration of throughput, the working frequency band is divided into a plurality of predetermined bands and time division multiplexing is performed. A known pilot symbol is inserted into the given frequency band at predetermined standard intervals. Also, a known pilot symbol is inserted into at least one of the predetermined frequency bands at shorter intervals than the predetermined standard intervals and is arranged there. |
 Transmitting device and receiving device in cellular communication system / 2501169In a multi-carrier cellular communication system, a second synchronisation code (a Walsh code or a GCL series code) mapped on a second synchronisation channel is used as a signal for specifying in which cell of the base station a mobile station terminal device is located. A signal transmitted from the base station to the mobile station terminal device is mapped in a radio frame having two-dimensional extension in frequency and time directions. The synchronisation channel on which the first and second synchronisation channels are mapped is built into a plurality of areas in the radio frame. When mapping a certain series number of the second code for specifying a cell or a cell group on the radio frame as the second synchronisation channel, phase rotation or circular shift in which one radio frame is one cycle is applied to the second synchronisation code. On the receiving side, the head timing of the radio frame is determined by obtaining the phase rotation angle or the amount of circular shift of the second synchronisation code. |
 Wireless transmitter, mobile station and method for wireless transmission of data units / 2501168Wireless transmitter includes a plurality of encoding and modulating units for applying corresponding encoding and modulation algorithms to input data units. A discrete Fourier transform (DFT) precoder performs, using DFT, processing of output data of encoding and modulating units, and an inverse fast Fourier transform (IFFT) unit receives the DFT output signal from the DFT precoder, which is projected on different subcarriers in accordance with allocation of resources indicated by a base station, and also performs, through IFFT, processing of the output signal processed through DFT. The output data processing step generates output signals based on the output signal of the IFFT unit for wireless transmission thereof to a wireless receiver. In various versions of the invention, output data of the encoding and modulating units may be transmitted to an IFFT unit to generate output information processed through IFFT. |
 Base station (versions), transmission method (versions) and mobile communication system / 2501163Base station is configured to communicate with a user terminal in a mobile communication system using a multiple input/multiple output (MIMO) scheme via precoding. The base station includes a control signal generating unit which is configured to generate a downlink control signal, which includes a flag indicator which indicates whether to use a precoding vector for downlink communication; and a transmitting unit which is configured to transmit a signal which includes a downlink control signal in a downlink, wherein the control signal generating unit is configured to perform channel coding using part of the information as a coding element. |
 Radio transmission device and radio transmission method / 2499358Invention is intended to improve channel quality indicator (CQI) reception performance even when a delay is caused in a propagation path, a transmission timing error is caused, or residual interference is generated between cyclic shift values of different ZC sequences. For the second symbol and the sixth symbol of the ACK/NACK signal which are multiplexed by RS of CQI, (+, +) or (-, -) is applied to a partial sequence of the Walsh sequence. For RS of CQI transmitted from a mobile station, + is added as an RS phase of the second symbol and - is added as an RS phase of the sixth symbol. A base station (100) receives multiplexed signals of ACK/NACK signals and CQI signals transmitted from a plurality of mobile stations. An RS synthesis unit (119) performs synthesis by aligning the RS phase of CQI. |
 Receiving device, receiving method and receiving system / 2499357Disclosed is a receiving device, having an obtaining unit configured to obtain a signal comprising a first signal and/or a second signal, having a different structure from each other except that the first and second signals have a preamble signal, and configured to obtain a preamble signal from the obtained signal; a detection unit configured to determine a correction value using the obtained signal for correcting the obtained signal; and a correction unit for correcting the obtained signal using the correction value determined by the detection unit if, based on the preamble signal obtained by the obtaining unit, it is determined that the obtained signal is a first signal. |
 Band selection method for mobile communication system built around orthogonal frequency division multiple access circuit arrangement / 2251822Proposed band selection method for mobile orthogonal frequency division multiple access communication system includes following steps to classify procedures of band selection between sending end and receiving ends with respect to original band selection process, passband width selection process, and periodic band selection process: determination of source band selection code (SC)number for source band selection process; SC number to request passband width for passband width request selection process and periodic SC number for periodic band selection process; determination of periodic SC deferment value in compliance with periodic SC number, and transmission of source SCs, passband width request SC, periodic SCs, and periodic SC deferment values on receiving ends. |
 Orthogonal frequency division modulated stationary wireless regional network employing user's room equipment provided with indoor antenna / 2255427Stationary wireless access system has, as a rule, user's room equipment unit connected through Ethernet interface to personal computer or to local network and base station unit connected through Ethernet interface to network. User's room equipment unit as such is easily installed by user while base station unit is usually mounted on mast at distance of 1 to 5 miles (1/6 to 8 km) from user's room equipment unit. Both the latter and base station unit usually incorporate integrated transceiver/data switch that provides for radio-frequency communications in the range of 2.5 to 2.686 GHz. Multiplexing with orthogonal frequency division of signals is used during transmission between user's room equipment units and base station ones over ascending and descending lines. |
 Start-stop communication system / 2261531Start-stop communication system that has on sending end signal shaping and transfer unit 1 and on receiving end, receiver 2, amplitude detector 3, low-pass filter 4, first comparator 6, memory device 7, shift register 8, first decoder 9, switch 10, synchronizing unit 11, pulse shaper 12, pulse burst shaper 13, binary counters 14, 17, signal retrieval and storage device 19, and threshold device 5 is provided in addition with newly introduced second comparator 15, RS flip-flop 16, and second decoder 18. |
 Device and method for transmitting and receiving with decreased relation of pike power to average power in mobile communication system with orthogonal multiplexing with frequency separation / 2264041Device for decreasing relation of pike power to average power signal, sent along N(=2r) sub-bearing lines in transmitting device, having encoders for block encoding of w input data, where r - real number > 2, and output of N code symbols, has: serial-parallel converter for transforming data flow to w-(r-2) parallel data flows, where w - length of information word, first coder for receipt of w/2 parallel data flows from w-(r-2) parallel data flows from serial/parallel converter, block encoding of w/2 parallel data flows and output of N/2 first code symbols, generator of input operators for generation of r-2 data flows of input operators, in accordance to w-(r-2) parallel data flows, and second coder for receiving parallel data flows from serial/parallel converter, which were not received at first coder and (r-2) data flows from input operators, block encoding of received data flows and output of N/2 second code symbols, while r-2 data flows of input operators provide for complementarity of N code symbols. |
 Device and method for receipt and synchronization at mobile platform in direct digital satellite broadcast system / 2276464Satellite system uses modulation with temporal signals separation and single-frequency network of ground-based re-emitting stations, each of which introduces a delay to ground signal. Delay allows to provide for coincidence of time of receipt of early modulated signal in the center of ground broadcasting zone with time of receipt of appropriate late modulated signal, thus improving switching between ground and satellite signals in receiver. Delay also compensates processing delay, occurring during conversion of satellite modulated stream under direct visibility conditions to multi-frequency modulated stream for transmission of satellite modulated stream under direct visibility conditions to user receivers. Delay is also adjusted in accordance to distance difference between each ground-based re-emitting station and satellite and between each station and center of ground-based broadcasting zone. Adjustment as described above optimizes receipt of temporal signals separation modulated and multi-frequency modulated signals by means of synchronization in the center of single-frequency system of phase of multi-frequency modulated signals, re-emitted from re-emitting stations of single-frequency system. |
 Device and method for generation of preamble series in communications system with orthogonal multiplexing and frequency separation of channels / 2278474In accordance to method, first series of preamble is generated, wherein odd data of input series of preamble are transformed to zero data, and even data of aforementioned series are transformed to nonzero data, first series of preamble is transmitted through one of two antennas, second preamble series is generated, wherein even data of input series of preamble are transformed to zero data, and odd data of aforementioned series are transformed to nonzero data, second series of preamble is transmitted through another antenna. |
 System for transferring discontinuous information / 2278475System for transmitting discontinuous information contains at transmitting side information sources, multipliers, adder, clock generator, Walsh functions generator, 2n keys (where 2n - number of outputs of Walsh functions generator) and frequency splitter, two elements of one-sided conductivity and 2n additional multipliers, and on receiving side - clock generator, Walsh functions generator, multipliers, integrators, information receivers, 2n keys and frequency splitter, two elements of one-sided conductivity and 2n additional multipliers. As a new addition, on transmitting side two one-sided conductivity elements are inserted and 2n additional multipliers, and on receiving side - two one-sided conductivity elements and 2n additional multipliers. |
 Device and method for transferring/receiving data in communication system, using multi-access layout / 2289210Communication system divides whole range of frequencies onto a set of sub-frequency ranges. Receiver of information about quality of channels receives information about quality of channels for each one of a set of frame cells, occupied during first time span by a set of frequency-time cells, occupied by second time span and a given number of sub-frequency ranges, transferred via check communication channel from receiver. Module for sorting frame cells analyzes information about quality of check communication channels and sorts frame cells in accordance to information about quality of channels. Module for assigning sub-channels, if transfer data exist, transfers data through a frame cell with best channel quality among other frame cells. |
 Method for decreasing value of peak power of signals and multi-frequency system for realization thereof / 2291577Method for decreasing ratio of peak signal power to its average ratio PAPR in multi-frequency communication systems, in which information symbol is formed by a set of signals, each one of which is centered on one of multiple bearing frequencies, is characterized by the fact that in transmitter a set of bearing frequencies is divided on several sections - subsets of bearing frequencies, information symbol, PAPR value of which does not exceed required threshold PAPR0, is transferred via all carriers, information symbol, value PAPR of which exceeds required threshold PAPR0 is divided on several sub-symbol sections, while number of these sections equals number of sub-carrier subsets, each section of symbol is transferred same as full symbol, wherein data are only transferred on one group of carriers, while other carriers are not modulated, in receiver, arrival of incomplete symbol is identified by analysis of amplitudes of carrier signals, which are not modulated in case of symbol division. Multi-frequency communication system is characterized by construction of receiver and transmitter, adapted for execution of operations, included in proposed method. |
 Radio communication equipment with orthogonal frequency multiplexing / 2297721The technical result is in increasing accuracy of synchronization of signals with orthogonal frequency multiplexing and that in its turn provides reduction of error possibility at reception of these signals even in such complex propagation conditions as shot-wave range channels. For this in the receiving set of the known equipment two memory blocks, two commutators, a maximum choice selection block, a meter and a time intervals calculation block are introduced. |
FIELD: radio engineering, communication.
SUBSTANCE: invention relates to a mobile communication system which defines a multiple input multiple output (MIMO) scheme as a radio transmission method, and is intended to increase the number of transmission levels. A radio base station (20) has a plurality of transmitting antennae, a module (22) for generating an orthogonal sequence of a reference signal, which is designed to generate orthogonal reference signals based on a two-dimensional orthogonal code, wherein the orthogonal reference signals are made orthogonal between downlink reference signals, adjacent to each other on two axes in the direction of the frequency axis and the direction of the time axis at one transmission level, and are made orthogonal at different transmission levels assigned to one radio communication resource, a multiplexer (23) designed to multiplex transmitted data and orthogonal reference signals at one transmission level, and a transmitter designed to transmit a transmitted signal, which is obtained by multiplexing transmitted data and orthogonal reference signals using a transmitting antenna simultaneously at transmission levels.
EFFECT: improved communication.
4 cl, 20 dwg
The technical field to which the invention relates
The present invention relates to a base station, mobile station and the manner of exercise of radio communication intended for the transmission descending reference signals.
The level of technology
In the standard schema WCDMA (version 8) organization for standardization 3GPP system is defined LTE (Long Term Evolution, long-term development), which is the successor of systems WCDMA (Wideband Code Division Multiple Access, broadband multistation access with code division multiplexing)systems, HSDPA (High Speed Downlink Packet Access high-speed packet data downlink) and HSUPA (High Speed Uplink Packet Access, high speed packet in the ascending line of communication). The scheme radio access system LTE version 8 (hereinafter - REL8-LTE) is OFDMA (Orthogonal Frequency Division Multiplexing Access, access orthogonal division multiplexing frequency)defined for the downlink.
The scheme OFDM is a transfer with a lot of bearing, in which the frequency band is split into many narrow strips of frequencies (carriers), each of which data is transmitted. Due to the fact that the carriers are positioned frequency tightly and orthogonalization, you can implement high-speed transmission and to increase the efficiency of frequency use.
In addition, the system REL8-LTE determined the structure of the downward reference signal. Downstream reference signal is used to measure the quality indicator channel (CQI, Channel Quality Indicator) downlink for planning and adaptive management, channel estimation is to determine the synchronization downlink in the terminal user (hereinafter - terminal system LTE), which supports the system REL8-LTE, and assessment of a descending channel transfer to search cell and handover.
In addition, the system REL8-LTE defines as a way radio diagram MIMO (Multiple-Input Multiple-Output scheme with multiple inputs and outputs), designed to improve the quality of communication through the provision of multiple antennas at the transmitter and the receiver (see NPL1). The scheme MIMO is classified into the scheme MIMO a with a single user (single MIMO), in which all levels of transmission (sequence of information transmitted)to be transferred simultaneously belong to one user and schema MIMO with many users (multiuser MIMO), in which these levels are different users.
In the scheme of MIMO with one user uses a maximum of four transmitting antennas for spatial multiplexing four levels in the base station. Each level does not correspond one-to-one of the transmitting antenna, and passed through all transmitting antennas by regulating the phase/amplitude transmission (preliminary coding, preceding). When using pre-coding levels that are transmitted at the same time, in the ideal case are accepted in the receiver as orthogonalizable (they do not create interference (noise) to each other). For this vector preliminary coding (weights of each of the transmitting antenna) defined in such a way that the levels of transmission (sequence of information transmitted)to be transferred at the same time, do not interfere with each other, and also taking into account the purpose, with the aim of ensuring high power ratio the signal-to-noise plus noise (SINR) in the terminal system LTE. In addition, pre-coding ensures that the formation of the beam, as in the directed transfer, and selects the desired wave for a specific user terminal.
The scheme MIMO with multiple users is implemented by means of allocation of the same block certain resources podkata levels of many terminal user. In this scheme the number of levels to highlight each user is limited to one.
As one of the options to improve transmission schemes MIMO is considered an additional increase the number of levels of transmission. However, this leads to the problem of the structure of the downward reference signal, that is the problem configuration downward reference signal when the number of levels of transmission.
Reference documents:
Non-patent documents:
Non-patent document 1: 3GPP TR 25.913[1].
Disclosure of the invention
The present invention is made with regard to the above issue, and the purpose of the present invention is to provide a base station and the manner of exercise of telecommunication that provides a wireless connection using patterns downward reference signal, providing an increase in the number of levels of transmission.
In the first aspect of the present invention is proposed base radio containing multiple transmit antennas, the module of formation of the reference signal for building orthogonal reference signals on the basis of two-dimensional orthogonal code, with orthogonal reference signals orthogonality between downstream supporting signals, adjacent to each other on two axes in the direction of the axis of frequencies and the direction of the time axis at the same level of transmission, and orthogonality at different levels of transmission, assigned to a single resource radio, multiplexer, intended for multiplexing of data transmitted and orthogonal reference signals at the same level of transmission, and the transmitter, designed for transmission of the signal being transmitted, received by means of multiplexing of data transmitted and orthogonal reference signals, by transmitting antenna at the same time, levels of transmission.
According to the first aspect, you can use the orthogonal code to orthogonalizable orthogonal descending reference signals are adjacent in the direction of the axis of frequencies at the same level of transfer, and also with use of orthogonal code to orthogonalizable descending reference signals related in the direction of the time axis at the same level of transmission. In addition, you can orthogonalizable descending reference signals, displayed on one of the allocated resource, between levels of transmission. In other words, using a simple two-dimensional orthogonal code, you can orthogonalizable orthogonal descending reference signals in three directions: along the frequency axis, along the time axis and between levels, ensuring thereby increasing the number of levels of transmission and orthogonalization between users.
The technical result of izobreteniyam accordance with the present invention can implement radio communication with use patterns downward reference signal, providing an increase in the number of levels of transmission.
Brief description of drawings
Figure 1 presents a General scheme of the structure of the reference signal.
Figure 2 presents a General scheme of orthogonal reference signal demodulation, which are orthogonal on different levels of transmission on two axes.
Figure 3 presents a General scheme orthogonalization orthogonal reference signal demodulation, which are adjacent on two axes at the same level of transmission.
Figure 4 is a schematic of a mobile communication system, including user terminals and base station.
Figure 5 represents the functional scheme of a base station according to one embodiment of the present invention.
6 represents the framework for the scrambling module intended for realization of scrambling between orthogonal codes.
Fig.7 is a General scheme of scrambling module intended for realization of scrambling between orthogonal codes.
Fig is a functional scheme of the user terminal according to one embodiment of the present invention.
Figure 9 presents a General scheme of the structure of the reference signal.
Figure 10 presents a General scheme of the structure of the reference signal in accordance with the modified example.
11 represents a functional diagram of a base station in accordance with the modified example.
Fig is a functional scheme of the user terminal in accordance with the modified example.
Fig is a General scheme of the structure of the reference signal in accordance with the modified example.
Fig is a diagram explaining the orthogonalization in the case of two levels of transmission.
Fig is a different scheme explaining the orthogonalization in the case of two levels of transmission.
Fig is the first orthogonal scheme in the case of the four levels of transmission.
Fig is the second orthogonal scheme in the case of the four levels of transmission.
Fig is the third orthogonal scheme in the case of the four levels of transmission.
Fig is the fourth orthogonal scheme in the case of the four levels of transmission.
Fig is a orthogonalization to display when implementing a cyclic shift in the frequency domain.
The implementation of the invention
Further, with reference to the attached drawings described embodiments of the present invention.
In one aspect of the present invention reference signal demodulation (DM-RS, Demodulation-Reference Signal), which are supporting the signals used for demodulation shared data channel (PDSCH) in the terminal system LTE-A, orthogonalized at different levels of transmission. The reference signal demodulation, multiplexures in transmitted data appropriate levels of transmission, orthogonalized on many different levels transmission (four levels, eight levels or more levels), which are described below suitable structure downward reference signal. Also below is described the structure of the downward reference signal suitable for orthogonalization reference signal demodulation subject orthogonalization at different levels of transmission for different users.
Figure 1(a) shows the scheme reference signal demodulation to block resources. This figure frequency domain consists of 12 consecutive carriers in accordance with the size of one block resources defined in the LTE system, and each podkat resources block consists of 14 characters. In one unit of resources transmitted data and the reference signal demodulation multiplexed thus, in order to prevent overlap in the frequency and time domains. Reference signal demodulation is prepared for each level of transmission. For example, when there are eight levels of the transfer of all formed eight reference signal demodulation, corresponding to the eight levels of transmission. Resource radio (in the time domain and frequency domain) (hereinafter allocated)resource that is allocated to the reference signal demodulation one level, is expressed as "one subcarriers x two consecutive characters". The size of the allocated capacity is not limited and can be set to "two sub-x two consecutive characters".
In the example shown in figure 1(a), the reference signal demodulation four levels of transmission is multiplexed in one of the allocated resources. In this case the scheme multiplexing reference signal demodulation applies multiplexing code division (CDM, code division multiplexing). Since the reference signal demodulation four levels of transmission are multiplexed in one allocated resource, if at least two of the allocated capacity, separated from each other in the direction of the axis of frequencies, recorded in one unit of resources that can be multiplexed reference signal demodulation all eight levels of transmission. Figure 1(a) three of the allocated capacity are separate from each other in the direction of the axis of frequencies in one unit of resources.
The reference signal demodulation different levels of transmission (four levels), multiplexures in one allocated resource, orthogonal to each other. The reference signal demodulation, multiplexures in one of the allotted share, multiplied by four different orthogonal code in accordance with the number of multiplexing, so four reference signal demodulation different levels of transmission can be orthogonal to each other.
Figure 1(b) shows an example of the structure of two-dimensional orthogonal codes. Two-dimensional orthogonal codes W switch to the first orthogonal code W 0 consisting of Walsh code 2 x 4, and the second orthogonal code W 1 , consisting of Walsh code 2 x 4, in which each line orthogonal to the corresponding row of the first orthogonal code. The size of the first and second orthogonal codes W 0 W 1 corresponds to the maximum number multiplexing (four levels of transmission) on the allocated resource, and the size of the element is one of the allocated resource (1 x 2).
Further, with reference to figure 1(a), 1(b), 2 and 3 provides a detailed description. At a certain position of the character (two consecutive characters in one podkate) three of the allocated capacity R11, R12 and R13 are equidistant from each other in the direction of the axis of frequencies, and two allocated resource R21, R22 and R23 are located on the same sub-allocated resources [R11, R12 and R13, respectively, and separated by the specified number of characters in the direction of the time axis.
Four reference signal demodulation, appropriate levels of transmission from the first level #1 transmission, on the fourth level #4 assists, multiplexed code division (CDM) in one of the allocated resource R11. Multiplexing code division four supporting characters demodulation, corresponding to levels of transmission from the first #1 on the fourth #4, multiplexing (CDM) in one of the allocated resource R11, so that the reference signal demodulation orthogonalized at different levels of transfer using the first orthogonal code W 0 . This also means that the reference signal demodulation, appropriate levels of transmission from the first level #1 on the fourth level #4, multiplied by the coefficients(-1, -1), (-1, 1), (1, 1), (1, -1), the appropriate relevant levels of transmission and multiplexed with the expansion of the spectrum. Figure 2 shows the General scheme of the four reference signal demodulation (from the first level #1 transmission in the fourth level #4 assists), muxed in the allocated resource R11, which are multiplexed with code division (orthogonality) using the first orthogonal code W 0 . The reference signal demodulation (from the first level #1 transmission in the fourth level #4 assists) orthogonality at different levels of transmission through the first orthogonal code W 0 .
The allocated resource R12 is a resource radio, ensuite in the direction of the axis of frequencies allocated resource R11. Four reference signal demodulation, appropriate levels of transmission from the fifth level #5 on the eighth level #8, multiplexures in the allocated resource R12, multiplexed code division so that the reference signal demodulation orthogonalized at different levels of transmission with the use of the second orthogonal code W 1 . This also means that the reference signal demodulation, appropriate levels of transmission from the fifth level #5 on the eighth level #8, multiplied by the coefficients(1, 1), (1, -1), (-1, -1), (-1, 1), the appropriate relevant levels of transmission, and multiplexed with the expansion of the spectrum. Figure 2 shows the General scheme of the four supporting characters demodulation (from the fifth level #5 transmission to the eighth level #8), muxed in the allocated resource R12, which are multiplexed with code division (orthogonality) using the second orthogonal code W 1 . The reference signal demodulation (from the fifth level #5 transmission to the eighth level #8 transfer) orthogonality at different levels transfer by the second orthogonal code W 1 .
In addition, the allocated resource R13 is a resource radio, ensuite in the direction of the axis of frequencies allocated resource R12. Four reference signal demodulation (from the first level #1 transmission in the fourth level #4 assists), multiplexures in the allocated resource R13 are multiplexed with code division so that the reference signal demodulation orthogonalized at different levels of transfer using the first orthogonal code W0.
Thus, the reference signal demodulation appropriate levels of transmission (from the first level #1 transmission in the fourth level #4) and (from the fifth level #5 transmission to the eighth level #8), muxed in the allocated resources R11, R12 and R13, orthogonal to each other at different levels of transmission in the relevant allocated resources R11, R12 and R13.
In addition, for the allocation of resources, related to each other in the direction of the axis of frequencies (R11, R12), (R12, R13), some reference signal demodulation (from the first level #1 transmission in the fourth level of transfer #4), muxed in allocated resources (R11, R13), orthogonal multiplexed (multiplexed with expansion of the range) using the first orthogonal code W 0 , and other reference signal demodulation (from the fifth level #5 transmission to the eighth level #8), muxed in the allocated resource (R12), orthogonal multiplexed (multiplexed with expansion of the range) using the second orthogonal code W 1 . In such a structure orthogonalization is between allocated resources related to the direction of the axis of frequencies (R11, R12), and between allocated resources related to axis direction frequency (R12, R13).
As shown in figure 1(a), the other three are allocated resource R21, R22 and R23 are located on the same subcarriers these three resources R11, R12 and R13, respectively, and separated by the specified number of characters in the direction of the time axis.
The allocated resource R21 is related above the allocated resource R11 in the direction of the time axis. Four reference signal demodulation, appropriate levels of transmission from the fifth level #5 transmission to the eighth level #8 transmission are multiplexed in the allocated resource R21. Four reference signal demodulation (with the fifth level #5 transmission to the eighth level #8), multiplexures in the allocated resource R21 are multiplexed with code division so that the reference signal demodulation orthogonalized at different levels of transmission with the use of the second orthogonal code W 1 . Figure 2 shows the General scheme of the four supporting characters demodulation (from the fifth level #5 transmission to the eighth level #8), muxed in the allocated resource R21, which are multiplexed with code division (orthogonality) using the second orthogonal code W 1 . Reference signals demodulation (from the fifth level #5 transmission to the eighth level #8 transfer) orthogonality at different levels of transmission through the second orthogonal code W 1 .
The allocated resource R22 is related above the allocated resource R12 in the direction of the time axis. Four reference signal demodulation, appropriate levels of transmission from the first level #1 transmission in the fourth level #4 multiplexed transmission in the allocated resource R21. Four reference signal demodulation (from the first level #1 transmission in the fourth level #4 assists), multiplexures in the allocated resource R22 are multiplexed with code division so that the reference signal demodulation orthogonalized at different levels of transfer using the first orthogonal code W 0 .
Thus, for the allocation of resources, related to each other in the direction of the time axis (R11, R21), (R12, R22) and (R13, R23), some reference signal demodulation (from the first level #1 transmission in the fourth level of transfer #4), muxed in the allocated resources (R11, R13, R22), orthogonal multiplexed (multiplexed with expansion of the range) using the first orthogonal code W0, and other reference signal demodulation (from the fifth level #5 transmission to the eighth level #8), multiplexed in the allocated resources (R21, R12, R23), orthogonal multiplexed (multiplexed with expansion of the range) using the second orthogonal code W 1 . In such a structure orthogonalization is between allocated resources, related in the direction of the time axis (R11, R21), between allocated resources, related in the direction of the time axis (R12 R12), and between the allocated resources, related in the direction of the time axis (R13, R23).
Figure 3 shows the General scheme of the reference signal demodulation, which orthogonality on two axes in the direction of the axis of the frequency and the time axis. Figure 3 shows the orthogonality level #2 transfer of four resources R11, R12, R21 R22, which are adjacent to each other along two axes (in the direction of the axis of frequencies and in the direction of the time axis). As shown in figure 3, on the same level #2 transmission reference signal demodulation in the allocated resources R11 and R12, adjacent to each other in the direction of the axis of frequencies and circled dashed line L1, orthogonal to each other, and the reference signal demodulation in the allocated resources R12 and R22, adjacent to each other in the direction of the time axis and circled dashed line L2, orthogonal to each other. This orthogonalization on two axes is provided at all levels of transmission.
In the above description, the reference signal demodulation, appropriate levels of transmission from the first level #1 on the fourth level #4, multiplexed code division using the first orthogonal code W 0 , which is one two-dimensional orthogonal code W, and the reference signal demodulation, appropriate levels of transmission from the fifth level #5 on the eighth level #8, multiplexed code division using the second orthogonal code W 1 , representing the other two-dimensional orthogonal code W. However, the present invention is not limited.
In another aspect of the present invention reference signal demodulation orthogonality for different users using the first orthogonal code W 0 and the second orthogonal code W 1 two-dimensional orthogonal codes W. In this case, for example, in the first orthogonal code W 0 , shown in figure 1(b), the first two code (-1, -1) and (-1, 1) allocated to a user UE1 (#1 to #2)and the following two code (1, 1) and (1, -1) allocated to a user UE2 (levels with #1 #2). In the resource block, shown in figure 1(a), different users UE1 and UE2 allocated resources, adjacent to each other in the direction of the axis of frequencies.
The reference signal demodulation many levels (first level #1 transmission and second level #2 programs) for the user UE1 multiplexed code division in the allocated resource R11 (R13)that is allocated to users UE1 and UE2, using the first two codes of the first orthogonal code W 0 and the reference signal demodulation many levels (first level #1 transmission and second level #2 programs) for the user also UE2 multiplexed with code division in the allocated resource R11 (R13) with the following two codes of the first orthogonal code W 0 .
In addition, for the allocated capacity R12, adjacent to the allocated resource R11 (R13) in the direction of the axis of frequencies, the reference signal demodulation many levels (third level #3 assists and fourth level #4 assists) for the user UE1 multiplexed code division in the allocated resource R12 using the first two codes second orthogonal code W 1 , and the reference signal demodulation many levels (third level #3 transfer and the fourth level #4 assists) for the user UE2 multiplexed code division in the allocated resource R12 using the following two codes second orthogonal code W 1 .
Thus, the signals of multiple users orthogonal way multiplexed each allocated resource, and the orthogonalization of the reference signal demodulation (first level #1 transmission and second level #2) and (third level #3 assists and fourth level #4 assists) multiple users can be done in the allocated resources R11 (R13) and R12, adjacent to each other in the direction of the axis of frequencies.
The following example shows how the implementation of radio communication with use of the descending reference signal demodulation, orthogonalizing as described above, as well as a base station and terminal radio, which use this method. The description is based on the example of radio access systems intended for systems LTE and LTE-A, but the present invention can also be used with other systems.
First, with reference to figure 4 describes system for mobile communication with the user terminals (e.g. mobile station and the base station.
System 1 mobile system based on LTE, which uses the method of realization of radio communications using the reference signal CRS, the reference signal quality indicator channel (CQI-RS) and the reference signal demodulation (DM-RS) as the downward reference signal. System 1 mobile communication includes a base station, 20 and many terminals 10 (10 1 , 10 2 , 10 3 ,..., 10 n , where n is a positive whole number) of the user who carry out communications with the base station 20. Base radio 20 connected with the station's top level, for example gateway 30 access, which is connected to the underlying network 40. Each terminal 10 user communicates with a base station in a cell of 20 to 50. This gateway 30 access can be defined as a sub-system mobility management/service gateway (MME/SGW, Mobility Management Entity/Serving Gateway).
As terminals(10 1 , 10 2 , 10 3 ,..., 10 n ) user have the same design, functions and modes, they collectively described as the terminal 10 user, except in certain specified cases. For ease of description, it is believed that a mobile station communicates with the base station, but in a more General case, the link provides the user terminal (UE, user equipment), including mobile and fixed (stationary) terminal.
In the system 1 mobile communications as radio access systems in the downlink scheme is applied OFDMA (Orthogonal Frequency Division Multiple Access, multiple access with orthogonal frequency division), and in the ascending line of communication scheme is applied SC-FDMA (Single Carrier Frequency Division Multiple Access, multiple access with the crossover frequency for single-carrier). As described above, the scheme OFDM is a scheme with a multitude of bearing, in which the frequency band is split into a number of more specific frequency bands (carriers), each of which displays the data for transmission. The scheme SC-FDMA is a transfer from one carrier, in which the frequency band is divided into strips, consisting of one or consecutive blocks resources to the terminal, and many terminals have different bandwidth, thereby reducing the interference between terminals.
The following is a channel of communication in the system of LTE.
In downlink used reference signal for transmission reference signal CRS, reference signal indicator of the quality of the channel (CQI-RS) and the reference signal demodulation (DM-RS), which are top-down support signals, physical downlink shared channel (PDSCH, physical downlink shared channel), shared terminals of the user, and physical downward channel management (top-down control channel L1/L2). Reference signal is used to transfer the reference signal demodulation with application of the above method of multiplexing. For signal transmission of user data is used physical downlink shared channel. Physical downward control channel is used for the message sequence information reference signal demodulation, information about planning, user identifier (ID) for communication with the use of physical descending General channel of information about the transport format of user data, i.e. information planning downlink, user ID to communicate with the rising use of physical shared channel and information about the transport format of user data, that is, the grant of planning ascending line of communication. Information about the sequence reference signal demodulation is the information for the messages to the terminal of the user which index is used by the channel PDCCH or signalling a higher level, when the reference signal demodulation determine the levels of transmission from #1 to #8 on indices and applies a single-threaded transfer. When using multi-level transmission, the control signal is used for messages about which index is used by other users are multiplexed on the same block resources.
In addition, in the downlink transmitted broadcast channels, such as physical broadcast channel (P-VSN, Physical-Broadcast Channel) and dynamic multicast channel (D-BCH, Dynamic Broadcast Channel). Information passed in the channel R-VSN, is a unit of basic information (MIB, Master Information Block), a information passed in the channel VSN, is a unit system information (SIB, System Information Block). Canal D-BCH is displayed on the channel PDSCH and is transferred to the terminal 10 user base radio 20.
In the ascending line of communication are used physical upward shared channel (PUSCH, physical shared uplink channel), shared terminals 10 user, and physical ascending channel management (PUCCH, physical uplink control channel, which represents the ascending channel management. With this data the user is using physical upward General channel. Physical upward control channel is used to transmit information about the preliminary encoding for transmission scheme MMO in the downlink, information about the acknowledgement (ACK/NACK) for General downward channel, information on the quality of radio communication in the descending line (CQI: Channel Quality indicator of the quality of the channel), etc.
In addition, in ascending line connection for initial connection, etc. defined physical random access channel (PRACH, physical random access channel). The terminal is 10 user is talking on the channel PRACH the preamble random access.
The following are the basic radio station 20 in accordance with the embodiment of the present invention. Base radio 20 has many transmitting antennas #1 to #M and the data being transmitted and descending reference signal (which contains the reference signal demodulation) levels transfer simultaneously transmitted through multiple transmit antennas. At the same time to simplify the description of it is assumed that the actual number of transmit antennas is eight. That is, the maximum number of levels of transmission can be equal to eight.
Base radio 20 contains the module 21 of formation of transmitted data, intended for formation of the transmitted data, the module 22 forming an orthogonal sequence reference signal for building orthogonal reference signal demodulation, multiplexer 23, intended for multiplexing of data transmitted and orthogonal reference signal demodulation, module 24 code generation scrambling for building code scrambling, and module 25 scrambling, intended for realization of scrambling by multiplying orthogonal reference signal demodulation at the code scrambling. In a base station 20 the formation of the transmitted data, the formation of orthogonal reference signal demodulation, code generation scrambling and multiplexing of data transmitted and orthogonal reference signal demodulation is carried out for each level of transmission.
Module 21 of formation of the transmitted data shall encoding with error correction and alternation to the character sequence data to be transferred. In the system of LTE as a code that has the ability to correct errors to encode data transmitted, defined turbo code. However, when using the present invention in a system other than the system LTE preferable to apply encoding scheme that is appropriate for the radio system. After encoding with error correction and implementation of alternation of transmitted data module 21 of formation of transmitted data provides serial-to-parallel conversion sequence transmitted data (n bits, which form one signal circuit OFDM) with the aim of obtaining data signal many sequences for subcarrier modulation. Striping can be carried out after the formation of a data signal many sequences. Module 21 of formation of the transmitted data shall subcarrier modulation signal data set of sequences in parallel. When subcarrier modulation may modulation schemes, as BPSK, QPSK, 16QAM, etc.
Module 22 forming an orthogonal sequence reference signal forms an orthogonal reference signal demodulation using two-dimensional orthogonal code (W=[W 0 W 1 ]). In accordance with the maximum number of levels of transmission (equal to 8) are working in parallel eight modules 22 of forming an orthogonal sequence reference signal. To differentiate between levels of transmission in this description to a reference position number "22" for ease of description is added the number "#n" level.
In addition, orthogonal reference signal demodulation, appropriate levels from #5 to #8 transmission, formed modules 22 (from #5 to #8) forming an orthogonal sequence reference signal. Module 22 (#5) forming an orthogonal sequence reference signal generates the reference signal demodulation, which is multiplexed with the transmitted data level #5 transmission. Module 22 (#5) forming an orthogonal sequence reference signal forms an orthogonal reference signal demodulation by multiplying the reference signal demodulation level 5 transfer to the first line (1,1) second orthogonal code W 1 . Similarly modules 22 (from #6 to #8), corresponding to other levels from #6 to #8 transmission, multiply the reference signal demodulation level #6 transfer to the second row (1, -1) second orthogonal code W 1 , the reference signal demodulation level #7 transfer - on the third line (-1, -1) second orthogonal code W 1 , and the reference signal demodulation level #8 transfer - on the fourth line (-1, 1) second orthogonal code W 1 . Thus, formed orthogonal reference signal demodulation in levels from #5 to #6 transmission, orthogonal to each other.
Thus, orthogonal reference signal demodulation four levels from #1 to #4 transmission generated by modules 22 (#1 to #4) forming an orthogonal sequence reference signal are multiplexed on the same allocated resources (R11, R13, R22). Accordingly, each of allocated resources (R11, R13, R22) orthogonal reference signal demodulation four levels from #1 to #4 multiplexed transmission of orthogonal way.
In addition, orthogonal reference signal demodulation four levels from #5 to #8 of transmission generated by the modules 22 (from #5 to #8) forming an orthogonal sequence reference signal are multiplexed on the same allocated resources (R12, R21, R23). Accordingly, each of allocated resources (R12, R21, R23) orthogonal reference signal demodulation four levels from #5 to #6 multiplexed transmission of orthogonal way.
As shown in figure 1(a), in this example, the group reference signal demodulation four levels from #1 to #4 transferring and group reference signal demodulation four levels from #5 to #8 multiplexed transmission separately. Allocated resources (R12, R21, R23), which is allocated to the reference signal demodulation levels from #5 to #8 transmission, and the resources allocated (R11, R13, R22), which is allocated to the reference signal demodulation levels from #1 to #4 assists, are located adjacent to each other in the direction of the axis of frequencies and in the direction of the time axis. Accordingly, at levels from #1 to #4 transferring and at levels from #5 to #8 transmission reference signal demodulation, related in the direction of the axis of frequencies, orthogonal to each other, and the reference signal demodulation, related in the direction of the time axis orthogonal to each other.
In the above description of the structure of the reference signal demodulation based on the number of levels transfer, equal to eight. As described above, the reference signal demodulation can be orthogonality using two-dimensional orthogonal code (W=[W 0 , W 1 ]), shown in figure 1(b), the assumption about the equality of the maximum number of levels of transmission of four.
Modules 22 of forming an orthogonal sequence reference signal correspond to the maximum number of levels of transmission (equal to 4) for each of the two terminals UE1 and UE2 user, and in the amount of parallel can work a maximum of eight modules forming an orthogonal sequence reference signal. To differentiate between levels of transmission from users in this description to a reference position number "22" for convenience in describing added Un-number#n.
The first two code first and second orthogonal codes W 0 W 1 are used for user UE1, and the following two codes are used for user UE2. In addition, the first two code first and second orthogonal codes W 0 W 1 are used for user UE1, and the following two codes are used for user UE2.
In addition, orthogonal reference signal demodulation, appropriate levels of #3 and #4 assists the user UE1, formed modules 22 (U1#3, U1#4) forming an orthogonal sequence reference signal. For the formation of orthogonal reference signal demodulation module 22 (U1#3) forming an orthogonal sequence reference signal multiplies the sequence reference signal demodulation level #3 transfer to the first row (1, 1) second orthogonal code W 1 . In the same way the module 22 (U1#4) forming an orthogonal sequence reference signal, corresponding to the level #4 assists, multiplies the sequence reference signal demodulation level #4 transfer to the second row (1, -1) second orthogonal code W 1 . Orthogonal reference signal demodulation, appropriate levels of #3 and #4 assists the user UE2, formed modules 22 (U2#3, U2#4) forming an orthogonal sequence reference signal. For the formation of orthogonal reference signal demodulation module 22 (U2#3) forming an orthogonal sequence reference signal multiplies the sequence reference signal demodulation level #3 transfer to the third row (-1, -1) second orthogonal code W 1 . In the same way the module 22 (U2#4) forming an orthogonal sequence reference signal, corresponding to the level #4 assists, multiplies the sequence reference signal demodulation level #4 transmission on the fourth line (-1, 1) second orthogonal code W1.
Thus, orthogonal reference signal demodulation levels #1 and #2 of transmission generated by the modules 22 (U1#1, U1#2) forming an orthogonal sequence reference signal for terminal UE1 user, and orthogonal reference signal demodulation levels #1 and #2 of transmission generated by the modules 22 (U2#1, U2#2) forming an orthogonal sequence reference signal for terminal UE2 user are multiplexed on the same allocated resources (R11, R13, R22).
In addition, orthogonal reference signal demodulation levels #3 and #4 of transmission generated by the modules 22 (U1#3, U1#4) forming an orthogonal sequence reference signal for terminal UE1 user, and orthogonal reference signal demodulation levels #3 and #4 of transmission generated by the modules 22 (U2#3, U2#4) forming an orthogonal sequence reference signal for terminal UE2 user are multiplexed on the same allocated resources (R12, R21, R23).
Module 24 code generation scrambling generates code scrambling designed to give the random character of interference from peripheral cells. Can be used two ways scrambling, including individual user scrambled and for individual cells scrambled. When applying for individual user scrambling scrambling for orthogonal reference signal demodulation are scrambling codes allocated to users in a unique way. The sequence scrambling can be determined through the ID of the user that is allocated to each user, or may be reported to the user's terminal through signaling a higher level. When applying for individual cells scrambling scrambling code can be determined through the ID of the honeycomb connection (cell, which takes the channel PDCCH) or can be served from the honeycomb connection of signaling a higher level (broadcast of information etc).
Figure 6 shows how scrambling when applying for individual user scrambling.
Module 25 scrambling has two multiplier 25A and 25b, the relevant parts of the orthogonal code. In part orthogonal code is multiplied by the same symbol modulation to prevent scrambling the orthogonal code and ensure scrambling only part between orthogonal codes. For example, the multiplier 25A multiplies code (1, 1, 1, 1) as of the same symbol modulation, and the multiplier 25b multiplies code (-1, -1, -1, -1) as of the same symbol modulation. This structure is scrambled between orthogonal codes and there is no inside part of the orthogonal code.
The method of scrambling, which consists in the multiplication of the same symbol modulation in part orthogonal code and scrambling between orthogonal codes, the following formula (1):
RS(i)=o(i mod(SF))x s("i/SF") (1)
In formula (1) a sequence of reference signal (RS) sequence i repeated at intervals SF for orthogonal sequence (o) and scribblenauts intervals SF. "I/SF" is the ratio obtained by dividing SF, i.
Module 25 scrambling multiply orthogonal codes in individual cells scrambling codes.
The method of scrambling, which consists in the multiplication of orthogonal codes in individual cells scrambling codes, can be expressed by the formula (2):
RS(i)=o(I·mod(SF))*s(i) (2)
The method of scrambling in accordance with the formula (1), intended for scrambling between orthogonal codes can only be used for individual cells the scrambling, and the method of scrambling in accordance with formula (2)intended for scrambling orthogonal codes that can be used individually for a user scrambling.
The following describes the case in which the code scrambling intended for scrambling non-orthogonal codes, but between orthogonal codes, extended on two-dimensional orthogonal code.
The method of scrambling for ensuring the conservation of orthogonality in two dimensions (the axes frequency and time), is expressed by the formula (3):
RS(t, f)=o(t·mod(SF t ), f·mod(SF f ))-s(t/SF t, f/SF f) (3)
In formula (3) the order reference signal (RS) is expressed in two axes: axis of time (t) and on-axis frequency (f). As for orthogonal sequence (about), is a temporary area is repeated at intervals SF f , a frequency domain is repeated at intervals SF f , and as scrambling, time domain scribblenauts intervals SF f , and the frequency domain scribblenauts intervals SF f . In this way scrambling scrambling trying carried out on each block resources.
The method of scrambling for ensuring the conservation of orthogonality only in the time domain, is expressed by the formula (4):
RS(t, f)=o(t·mod(SF t ), f·mod(SF f ))·s(t/SF t, f) (4)
In the formula (4)with regard scrambling, time domain scribblenauts intervals SF t , but the frequency domain scribblenauts always. That is the orthogonality of orthogonal codes is provided in the time domain, but not in the frequency domain. This method is designed to improve the effect of scrambling in the frequency domain, when the scrambling for each block resources in accordance with the formula (3) ineffective.
Furthermore, the method of scrambling for ensuring the conservation of orthogonality only in the frequency domain, is expressed by the formula (5):
RS(t, f)=o(t·mod(SF t ), f·mod(SF f ))·s(t, f/SF f) (5)
In formula (5)with regard scrambling, frequency domain scribblenauts intervals SF t , but the temporal area scribblenauts always. That is the orthogonality of orthogonal codes is provided in the frequency domain, but not in the time domain. This method is designed to improve the effect of scrambling in the time domain, when the scrambling for each block resources in accordance with the formula (3) ineffective.
Multiplexer 23 multiplexes data being transmitted and orthogonal reference signal demodulation in one unit of resources so that they do not overlap each other. Figure 1(a) transmitted data displayed on white elements resources, and orthogonal reference signal demodulation displayed on the above resources with R11 on R13 and R21 on R23. Here the data being transmitted and orthogonal signal demodulation multiplexed for each level of transmission.
Module 26 preliminary encoding determines the vector of the preliminary encoding taking into account fluctuations fading thus, to correct the interference at levels transfer, subject to the simultaneous transmission, and to provide the reception with a high ratio of SINR in the user terminal. The terminal of the user selects an indicator matrix preliminary coding (PMI Preceding Matrix Indicator)button when receiving the attitude SINR each level of transmission was the most and takes it back.
Module 27 inverse fast Fourier transform (ABPP) performs the inverse fast Fourier transform of the transmitted signal (signal under carrier) in the frequency domain, in which carriers displayed transmitted data and orthogonal reference signal demodulation. This inverse fast Fourier transform of the signal with frequency components allocated to sub-carrier, is converted to the signal line with the transient components. Then the module 28 add a cyclic prefix adds a cyclic prefix, the transmitting power 29 increases power, after which the signal is transmitted by the transmitting antenna.
Further, with reference to Fig describes the terminal 10 user in accordance with the embodiment of the present invention.
Processing system when receiving terminal 10 user receives the signal, which, as described above, multiplexed at each level transmission orthogonal reference signal demodulation and data transmissions. The received signal is input module 31 removal of cyclic prefix, in which cyclic prefix is removed. Module 32 fast Fourier transform performs a fast Fourier transform of a received signal, which removed the cyclic prefix, so the signal is a sequence of components in the time domain is converted into line with frequency components. Module 33 allocation does a reverse mapping from the subcarrier signal and selects from it the reference signal intended for the transmission sequence reference signal, the control channel (for example, channel RNZN, PDCCH), designed to transfer descending information management, and common channel (for example, channel PDSCH)intended for the transmission of data to be transferred.
Orthogonal reference signal modulation in the form of accepted characters reference signal is input module 34 multi-level assessment of the channel. Channel PDSCH is input module 35 multilevel demodulation, which is a module demodulation descending transmitted data.
Module 34 multilevel channel estimation uses the information about the sequence reference signal demodulation (information about the set of orthogonal reference signals related to two-dimensional orthogonal code W)obtained by decoding channel PDCCH (PDSCH), to obtain a reference signal demodulation of the corresponding level, transfer and assesses channel level transmission using reference signal demodulation. This multi-level assessment of the channel is used as the basis for demodulation of transmitted data.
In addition, when the reference signal demodulation scrambled through individual user of the method of scrambling information about the scrambling is transmitted via signaling a higher level. Information about scrambling contains a repeat interval SF f in the frequency domain, repeat interval SF t in the time domain, and information intended to specify the code scrambling corresponding to each part of the orthogonal code. Module 34 multilevel channel estimation descrambler reference signal demodulation in accordance with the transferred information scrambling.
As described above, in accordance with the present invention, as orthogonalization reference signal demodulation is used two-dimensional orthogonal code (W=[W 0 W 1 ]), among the reference signal demodulation, displayed on two-dimensional surface in a block of resources that can be orthogonality each other reference signal demodulation, adjacent to each other in the direction of the axis of frequencies on the same level of transfer, and can be orthogonality reference signal demodulation, adjacent to each other in the direction of the time axis. In addition, the reference signal demodulation displayed in the same allocated resource, can be orthogonality at different levels of transmission. In other words, a simple two-dimensional orthogonal code (W=[W 0 W 1 ]) is used to provide three types of orthogonalization of the reference signal demodulation in the direction of the axis of frequencies in the direction of the axis of time and at different levels, making it possible to increase the number of levels of transmission and achieve orthogonality between users.
In the above description, the reference signal demodulation orthogonalized by multiplying sequences reference signal demodulation on the first and second orthogonal codes (W 0 , W-1 ). However, the very two-dimensional orthogonal code W=[W 0 , W 1 ] can be used as a sequence of the reference signal demodulation. In this case the processing of the multiplication sequence reference signal demodulation on the first and second orthogonal codes (W 0 , W-1 ) can be omitted. In addition, in the above example, for realization of the two-dimensional orthogonal codes are used orthogonal codes W 0 , W-1 . In the present invention, as shown in figure 9(a), the orthogonal code is multiplied in the time domain, and its direction multiplication (the direction of the arrow in figure 9(a)) changes in the frequency domain alternately with forming thereby a two-dimensional orthogonal code (see figure 9(b)). Even in this way you can generate codes that are orthogonal to each other, regardless of whether you have selected the time or frequency for the procedure, return to expansion of a spectrum.
Further, with reference to Fig-19 detail orthogonalization, implemented through the trade-offs two-dimensional orthogonal codes in the direction of multiplication. On Fig(a) and pig(b) shows a schematic explaining the orthogonalization in the case of two levels of transmission. In the description below assumes that orthogonalization reference signal demodulation level #1 transmission in the direction of the time axis and the direction of the axis of frequencies is implemented through the change of the two-dimensional orthogonal codes shown in figure 9(b), in the direction of multiplication. Accordingly, the following describes orthogonalization using two-dimensional orthogonal codes, level #2 transfer on the basis of two-dimensional orthogonal codes, level #1 transmission.
As shown in Fig(b), two-dimensional orthogonal code W 1 , used at the level #2 transmission, orthogonal two-dimensional orthogonal code W 0 used at the level #1 transmission. On Fig(b) to simplify the description of two-dimensional orthogonal code W 0 level 1 transmission as a basis equal to (1, 1), but this is just to illustrate to denote the orthogonal relative to the two-dimensional orthogonal code W 1 . Accordingly, at the level #1 transmission reference signal demodulation orthogonality in the direction of the time axis in the direction of the axis of frequencies, both at the level #2 transmission.
In this case, the serial characters allocated resource R51 shown in Fig(a), multiplied by the codes are two-dimensional orthogonal code W 1 sequentially in the forward direction relative to the time of the arrow. In the same manner consistent characters allocated resource R61 multiplied by codes are two-dimensional orthogonal code W 1 sequentially in the forward direction relative to the time of the arrow. In addition, the characters in the allocated resources R52 and R62, related in the direction of the axis of frequencies allocated resources R51 and R61, respectively, multiplied by the codes are two-dimensional orthogonal code W 1 sequentially in the opposite direction of the time axis, and the direction of multiplication is replaced. That is on the same level transfer two-dimensional orthogonal code is displayed on a group of items of resources downward reference signal on the same frequency domain, and the direction of the display codes the opposite in the member groups of resources, related to the direction of the axis of frequencies. This group of items resources are allocated resources R51 and R61, allocated resources R52 and R62, allocated resources and R53 R63 allocated resources R54 and R64 allocated resources R55 and R65, and the resources allocated R56 and R66.
At this time in the allocated resource R51 code (-1) is displayed on the first element of the resource in the forward direction, and code (1) is shown on the next element of the resource. In the allocated resource R61 code (-1) is displayed on the first element of the resource in the forward direction, and code (1) is shown on the next element of the resource. Between allocated resources (R51, R61) when orthogonalization reference signal demodulation are two combinations of codes (1, -1).
In the allocated resource R52 code (1) is displayed on the first element of the resource in the opposite direction, and the code (-1) is displayed on the next element of the resource. In the allocated resource R62 code (1) is displayed on the first element of the resource in the opposite direction, and the code (-1) is displayed on the next element of the resource. Accordingly, the reference signal demodulation between allocated resources (R51, R52) and (R61, R62) also orthogonalized through two combinations of codes (1, -1). In addition, between other resources allocated shows the same dependence. Thus, two-dimensional orthogonal code W 1 is multiplied in the time domain, and the direction of multiplication changes in the frequency domain, so the reference signal demodulation can be orthogonality in the direction of the time axis, axis frequency and between levels of #1, #2 transmission.
This orthogonalization can be implemented by changing the direction of the multiplication of two-dimensional orthogonal code in the frequency domain on the back, as well as by measuring the direction of multiplication of two-dimensional orthogonal code in the time and frequency regions on the back, as shown in Fig. In other words, on the same level transfer two-dimensional orthogonal code is displayed on the member groups of resources descending reference signals of the same frequency domain, and the direction of the display codes the opposite in the member groups of resources, related to the direction of the axis of frequencies and in the direction of the time axis. This group of items resources are allocated resources with R51 on R56, R61 on R66. For example, in the allocated resource R51 code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R61 code (-1) is displayed on the first element of the resource, and the code (1) is shown on the next element of the resource. Accordingly, the reference signal demodulation between allocated resources (R51, R62) orthogonalized through two combinations code (1, -1).
In addition, the allocated resource R52 code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Accordingly, the reference signal demodulation between allocated resources (R51, R52) orthogonalized through two combinations code (1, -1). In addition, between other resource allocations can be shown the same dependence. In this structure, you can implement the orthogonalization of the reference signal demodulation in the direction of the time axis, axis frequency and between levels of #1, #2 transmission.
As shown in Fig(a), in block RB1 resources are allocated three block R7a-R7c resources, which are situated at equal distances from each other in the direction of the axis of frequencies. The resources allocated R8a-R8c are located on the same carrier, and that the resources allocated R7a-7c, respectively, and removed from them by the specified number of characters in the direction of the time axis. In addition, each of the blocks RB2, RB3 and RB4 resources, adjacent to the block RB1 resources allocated three resource R7d-R7I and three of the allocated capacity R8d-R8I are situated at equal distances from each other in the same way.
As shown in Fig(b), two-dimensional orthogonal codes X 1 , X 2, X 3 , used at levels #2, #3 and #4 assists, orthogonal on the levels of the two-dimensional orthogonal code X 0 used at the level #1 transmission. On Fig(b) to simplify the description assumes that the two-dimensional orthogonal code X 0 level 1 transmission as the basis of equal(1, 1, 1, 1), however, this is just to illustrate to denote the orthogonal with two-dimensional orthogonal codes X 1 , X 2 , X 3 . Accordingly, at the level #1 transmission reference signal demodulation orthogonal to each other in the direction of the time axis in the direction of the axis of frequencies, as in the level #2 transmission.
In addition, each of the two-dimensional orthogonal codes X 1 , X 2 , X 3 described as a combination of the first two codes (the first code group) and the last two codes (second code group). The first two codes correspond triangular arrow indicating the direction of the display (multiplication). The last two codes correspond to the L-shaped arrow indicating the direction of the display (multiplication). For example, for the case of two-dimensional orthogonal code X level 3 #3 assists the first two codes are code (1, 1), and the latter two codes are code (-1, -1). The following describes orthogonalization in accordance with the first orthogonal scheme using two-dimensional orthogonal code X 2 level #3 transfer to simplify the description.
The first orthogonal scheme shown in Fig(a), is a scheme in which the first two code and the latter two codes are displayed in groups of resource items in this order. The group of elements of resource is a pair of resources allocated R8n and R7n. To have this orthogonal scheme is such that the first two of code, and the last two two-dimensional code code X 3 are allocated in the direction of the time axis in the direction of the axis of frequencies alternately when the direction display in the direction of the axis frequency is changed to the opposite. For example, in the allocated resource R7a the latter two codes are displayed in the forward direction indicated by L-shaped arrow. And in the allocated resource R8b, related in the direction of the time axis with allocated resources R7a, the first two codes are displayed in the forward direction, marked by a triangular arrow. In addition, the allocated resource R7b, related in the direction of the axis of frequencies allocated resource R7a, the first two codes are displayed in the reverse direction, marked by a triangular arrow. In addition, the allocated resource R8b, related in the direction of the axis of frequencies allocated resource R8a, the latter two codes are displayed in the reverse direction indicated by L-shaped arrow.
At this time in the allocated resource R7a code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R8a code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Thus, the reference signal demodulation orthogonalized through two combinations of codes (1, 1) and (-1, -1) between allocated resources (R7a, R8a).
In addition, the allocated resource R7b code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. In the allocated resource R8b code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. Accordingly, the reference signal demodulation orthogonalized through two combinations of codes (1, 1) and (-1, -1) between allocated resources (R7a, R8a) and (R8a, R8b). In addition, the reference signal demodulation between other resource allocations and other levels of transmission orthogonalized the same way. Thus, in the first orthogonal schema reference signal demodulation orthogonalized in the direction of the time axis in the direction of the axis of frequencies and between levels from #1 to #4 assists.
Since the maximum power of the first circuit of orthogonalization is determined by several codes in which direction display on the direction of the axis of frequencies equally, the maximum power in the first orthogonal scheme cannot be arbitrary. For example, between allocated resources R8a-R8I, adjacent to each other in the direction of the axis of frequencies, code (1,1) displays all resources allocated in the forward direction, so that the maximum power increases.
Further, with reference to Fig described the second orthogonal scheme. On Fig(a) and 17(b) shows a schematic explaining orthogonal scheme for the case of four levels of transmission. In the following description of the reference signal demodulation at the level #1 transmission orthogonality in the direction of the time axis and the direction of the axis of frequencies, and described orthogonalization higher level of transfer on the basis of two-dimensional orthogonal codes used at the level #1 transmission. The following describes orthogonalization in accordance with the second orthogonal scheme using two-dimensional orthogonal code X 2 level #3 transfer to simplify the description.
Second orthogonal scheme shown in Fig(a), an orthographic scheme in which the order of the first two codes and the latter two codes are two-dimensional orthogonal code that must be displayed on the above groups of items of resources was reversed for many blocks of resources (in this case, two blocks resources). In other words, the second orthogonal scheme is implemented through the same circuit patterns that first and orthogonal to the first two of code, and the last two code two-dimensional orthogonal code X 2 change in units of two blocks of resources. The number of blocks resources for exchanges of the first and the latter two codes are not limited to two. For example, in the allocated resource R7a the latter two codes are displayed in the forward direction indicated by L-shaped arrow. In addition, the allocated resource R8a, related in the direction of the time axis with allocated resources R7a, the first two codes are displayed in the forward direction, marked by a triangular arrow. In addition, the allocated resource R7b, related in the direction of the axis of frequencies allocated resource R7a, the first two codes are displayed in the reverse direction, marked by a triangular arrow. In addition, the allocated resource R8b, related in the direction of the axis of frequencies allocated resource R8a, the latter two codes are displayed in the reverse direction indicated by L-shaped arrow. Thus, in blocks RB1 and RB2 resources orthogonal scheme is the same as the first orthogonal scheme.
On the other hand, in blocks RB3, RB4 resources the first two codes corresponding to the triangle button, replaced the last two codes corresponding to the L-shaped arrow. For example, in the allocated resource R7g the first two codes are displayed in the forward direction, marked by a triangular arrow. In addition, the allocated resource R8g, related in the direction of the time axis with allocated resources R7g, the latter two codes are displayed in the forward direction indicated by L-shaped arrow. In addition, the allocated resource R7h, related in the direction of the axis of frequencies allocated resource R7g, the latter two codes are displayed in the reverse direction indicated by L-shaped arrow. In addition, the allocated resource R8h, related in the direction of the axis of frequencies allocated resource R8g, the first two codes are displayed in the reverse direction, marked by a triangular arrow.
At this time in the allocated resource R7a code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R8a code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Accordingly, the reference signal demodulation between allocated resources (R7a, R8a) orthogonalized through a combination of codes (1.1) and (-1, -1). Thus, as the first two code and the latter two codes are combined in the direction of the time axis, the reference signal demodulation can be orthogonal to each other.
In addition, the allocated resource R7b code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is displayed on the last element of the resource. In the allocated resource R8b code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. Accordingly, the reference signal demodulation between allocated resources (R7a, R7b) and (R8a, R8b) orthogonalized through a combination of codes (1, 1) and (-1, -1).
However, the allocated resource R7f code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. In the allocated resource R7g code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Accordingly, the reference signal demodulation not orthogonalized through two combinations of code (1,1) between allocated resources (R7g, R7h).
In addition, the allocated resource R8f code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R8g code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. Accordingly, the reference signal demodulation not orthogonalized through two combinations of code (-1, -1) between allocated resources (R8g, R8h).
The nature of the peak power of the second orthogonal schemes becomes arbitrary, compared with a peak power of the first orthogonal schemes. That is the second orthogonal scheme is more random than the first orthogonal scheme, as it has the same structure as the first orthogonal scheme, with the first two of code, and the last two code two-dimensional orthogonal code change in units of two blocks of resources. For example, in the allocated resources R8a-R8f, related in the direction of the axis frequency blocks RB1 and RB2 resources all resources allocated in the forward direction code is displayed (1, 1), and in the allocated resources RB3 and RB4 on all resources allocated in the forward direction is highlighted code (-1, -1). Accordingly, prevents the increase of the peak power.
Further, with reference to Fig described the third orthogonal scheme. On Fig(a) and 18(b) shows a diagram illustrating the third orthogonal scheme for the case of four levels of transmission. Thus in the following description assumes that the reference signal demodulation at the level #1 transmission orthogonality in the direction of the time axis and the direction of the axis of frequencies, and described orthogonalization higher level of transfer on the basis of two-dimensional orthogonal code used on level #1 transmission. The following describes orthogonalization in accordance with the third orthogonal scheme using two-dimensional orthogonal code X 2 level #3 transfer to simplify the description.
Third orthogonal scheme shown in Fig(a), an orthographic scheme in which the order of the first two codes and the latter two codes are two-dimensional orthogonal code that must be displayed on the above groups of items of resources was reversed. That is, in the third orthogonal scheme, the first two of code, and the last two two-dimensional code code X 2 stand out in the direction of the time axis in the direction of the axis of frequencies alternately in the two units of the resources allocated, related in the direction of the axis of frequencies, the direction display in the direction of the axis frequency is changed to the opposite. For example, in the allocated resource R7a the latter two codes are displayed in the forward direction indicated by L-shaped arrow. In addition, the allocated resource R8a, related in the direction of the time axis with allocated resources R7a, the first two codes are displayed in the forward direction, marked by a triangular arrow. In addition, the allocated resource R7b, related in the direction of the axis of frequencies allocated resource R7a, the latter two codes are displayed in the reverse direction indicated by L-shaped arrow. In addition, the allocated resource R8b, related in the direction of the axis of frequencies allocated resource R8a, the first two codes are displayed as indicated by the triangle arrow.
In addition, the allocated resource R7c, related in the direction of the axis of frequencies allocated resource R7b, the first two codes are displayed in the forward direction, marked by a triangular arrow. In the allocated resource R8c, related in the direction of the axis of frequencies allocated resource R8b, the latter two codes are displayed in the forward direction indicated by L-shaped arrow. In the allocated resource R7d, related in the direction of the axis of frequencies allocated resource R7c, the first two codes are displayed in the reverse direction, marked by a triangular arrow. In the allocated resource R8a, related in the direction of the axis of frequencies allocated resource R8c, the latter two codes are displayed in the reverse direction indicated by L-shaped arrow.
Further, in the allocated resource R7a code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R8a code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Accordingly, the reference signal demodulation between allocated resources (R7a, R8a) orthogonalized through a combination of codes (1.1) and (-1, -1). Thus, the orthogonality of the reference signal demodulation can be saved thanks to the combination of the first two codes and the last two codes in the direction of the time axis.
In addition, the allocated resource R7b code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R8b code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Accordingly, the reference signal demodulation not orthogonalized through two combinations of code (-1, -1) between allocated resources (R7a, R7b). In addition, the reference signal demodulation not orthogonalized through two combinations of code (1,1) between allocated resources (R8a, R8b).
In addition, the allocated resource R7c code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. In the allocated resource R8c code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. Thus, the reference signal demodulation orthogonalized through two combinations of codes (1, 1) and (-1, -1) between allocated resources (R7b, R7c) and the allocated resources (R8b, R8c). Thus, at the level #3 of transfer to third orthogonal schemes as the first two code (the last two code) two-dimensional orthogonal code X 2 frequency domain displays two by two, orthogonalization reference signal demodulation is implemented in the direction of the time axis, but not implemented partially in the direction of the axis of frequencies. This orthogonalization reference signal demodulation in the areas along the time axis and the axis of frequencies is implemented at levels #2 and #4 assists, while its detailed description is omitted.
The nature of the peak power of the third orthogonal schemes over an arbitrary compared with a peak power of the first orthogonal schemes. Thus, the third orthogonal scheme has a more casual than the first scheme, as the first two code (the last two code) are replaced by the units of the two resources are adjacent in the direction of the axis of frequencies. For example, in the allocated resources R8a-R8f, related in the direction of the axis of frequencies, allocated resources in the forward direction are displayed alternately codes (1, 1) and (-1, -1). Accordingly, it is possible to achieve an additional reduction of the growth peak power.
Further, with reference to Fig described fourth orthogonal scheme. On Fig(a) and 19(b) shows a schematic explaining the fourth orthogonal scheme for the case of four levels of transmission. Thus in the following description assumes that the reference signal demodulation at the level #1 transmission orthogonality in the direction of the time axis and the direction of the axis of frequencies, and described orthogonalization higher level of transfer on the basis of two-dimensional orthogonal code used on level #1 transmission. The following describes orthogonalization in accordance with the fourth orthogonal scheme using two-dimensional orthogonal code X 2 level #3 transfer to simplify the description.
Fourth orthogonal scheme shown in Fig(a), an orthographic scheme in which the same levels of transmission codes for the two-dimensional orthogonal code displayed on a group of items of resources descending reference signals in the same frequency domains, the referral code is displayed opposite to each other in units of many groups of resource items (in this case, two groups of resource items), connecting the axis frequency, two-dimensional orthogonal code is divided into the first two of code, and the last two code, two first code and the latter two codes are displayed on a group of resource items in this order, and the order of the first two codes and the latter two codes are two-dimensional code that must be displayed on a group of items of resources affected. That is, the fourth orthogonal scheme is implemented through the first two codes and the latter two codes are two-dimensional code X 2, alternating in the direction of the time axis in the direction of the axis of frequencies, the direction display in the direction of the axis frequency is changed to the opposite in the two units of the resources allocated. For example, in the allocated resource R7a the latter two codes are displayed in the forward direction indicated by L-shaped arrow. In the allocated resource R8a, related in the direction of the time axis with allocated resources R7a, the first two codes are displayed in the forward direction, marked by a triangular arrow. In addition, the allocated resource R7b, related in the direction of the axis of frequencies allocated resource R7a, the first two codes are displayed in the forward direction, marked by a triangular arrow. In addition, the allocated resource R8b, related in the direction of the axis of frequencies allocated resource R8a, the latter two codes are displayed in the forward direction indicated by L-shaped arrow.
In addition, the allocated resource R7c, related in the direction of the axis of frequencies allocated resource R7b, the latter two codes are displayed in the reverse direction indicated by L-shaped arrow. In the allocated resource R8c, related in the direction of the axis of frequencies allocated resource R8b, the first two codes are displayed in the reverse direction, marked by a triangular arrow. In the allocated resource R7d, related in the direction of the axis of frequencies allocated resource R7c, the first two codes are displayed in the reverse direction, marked by a triangular arrow. In the allocated resource R8d, related in the direction of the axis of frequencies allocated resource R8c, the latter two codes are displayed in the reverse direction indicated by L - shaped arrow.
The nature of the peak power of the fourth orthogonal schemes over an arbitrary compared with a peak power of the first orthogonal schemes. That is the nature of the fourth orthogonal schemes are more random than the first orthogonal schemes, because the first and last codes of the same directions display adjacent to each other. For example, in the allocated resources R8a-R8f, related in the direction of the axis frequency codes (1, 1) and (-1, -1) are displayed alternately on the resources allocated, related in the forward direction. Accordingly, it is possible to achieve an additional reduction of the growth peak power.
As described above, in the case of the four levels of transmission of orthogonalization in the direction of the time axis and the direction of the axis of frequencies and between levels from #1 to #4 transfer is implemented in the first orthogonal to the scheme, however, the nature of the peak power is not arbitrary. In the second and third orthogonal schemes orthogonalization reference signal demodulation not implemented partially in the direction of the axis of frequencies, but the maximum power acquires a random character compared with the first orthogonal pattern. In the fourth orthogonal scheme is implemented orthogonalization in the direction of the time axis and the axis of frequencies, as well as between the levels from #1 to #4 assists, and the nature of peak power becomes random compared with the first orthogonal pattern. In addition, as the sets, consisting of two codes (1) and two codes (-1)appear on the resource items, located in the direction of the time axis in the direction of the axis of frequencies orthogonalization reference signal demodulation between levels from #1 to #4 transfer, in particular orthogonalization level #1 transmission can be achieved in two dimensions, formed by the time axis and the axis of frequencies.
Moreover, the description is based on the example that uses a structure for the formation of two-dimensional orthogonal code by changing in the opposite direction multiply orthogonal codes in the time domain or in the alternative in the frequency domain. However, in the present invention, as shown in Fig, two-dimensional orthogonal code can be generated by cyclic shift orthogonal code in the frequency domain. In this way you can also form an orthogonal codes regardless of whether you have selected the time or frequency for the procedure reverse the expansion of the spectrum. Further, with reference to Fig describes the implementation of orthogonalization through a cyclic shift of two-dimensional orthogonal codes.
As shown in Fig(a), three of the allocated capacity R91-R93 are equidistant from each other in the direction of the axis of frequencies in the block RB1 resources. The resources allocated R101-R103 are located on the same carrier, and that the resources allocated R91-93, respectively, and removed from them by the specified number of characters in the direction of the time axis. In addition, the unit RB2 resources, adjacent to the block RB1 resources, there are also three of the allocated capacity R94-R96 and three of the allocated capacity R104-R106, located separately from each other in the same way.
As shown in Fig(b), two-dimensional orthogonal codes W 1 , W-2 and W-3 are used at levels #2, #3 and #4 assists, orthogonal on the levels of the two-dimensional orthogonal code W 0 used at the level #1 transmission. Each code is a two-dimensional orthogonal codes W 1 , W 2 W 3 is displayed and moves in the direction of a cyclic shift indicated by the arrow between the many groups of resource items, located in the direction of the axis of frequencies. For example, for a two-dimensional orthogonal code W 2 level #3 transfer of a cyclic shift is repeated in the following order: (1, 1, -1, -1), (-1, 1, 1, -1), (-1, -1, 1, 1) and(1, -1, -1, 1). The following description is based on the example of orthogonalization in orthogonal scheme using two-dimensional orthogonal code W 2 level #3 assists. On Fig(a) and 20(b) the letter a, b, C, d indicate the correspondence between two-dimensional codes orthogonal code, and allocated resources.
In orthogonal shown on Fig(a), a group of members of resources consists of a pair of resources allocated 9n and 10n. In each group 9n, 10n elements of resources each code is a two-dimensional orthogonal code W 2 is allocated to the group. Each code is a two-dimensional orthogonal code W 2 allocated to each group, rotated by one code in the direction of the axis of frequencies. That is orthogonal this scheme is realized through many groups of elements resources located in the direction of the axis frequency shift each code two-dimensional orthogonal code W 2-on-one code for each group of items of resources toward a higher frequency and code view. For example, the code (1, 1, -1, -1) is displayed in the member groups of resources R91, R101, and code (-1, 1, 1, -1) is displayed on the member groups of resources R92, R102, related in the direction of the axis of frequencies with groups of resource items R91, R101.
In this case, the allocated resource R91 code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R101 code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. Thus, in the resource items R91 R101 and displays each code is a two-dimensional orthogonal code W 2 . At this point in the same groups of resource items other levels #1, #2 and #4 transmission is also displayed each code is a two-dimensional orthogonal codes W 0 , W-1, W 3 . Accordingly, in groups of resource items R91 and R101 can be implemented orthogonalization between levels transfer with other levels of #1, #2 and #4 assists.
In groups of resource items R92 R102 and displays each code is a two-dimensional orthogonal code W 2 , cyclically out on one code. At this point in the same groups of resource items other levels #1, #2 and #4 transfer displays the corresponding codes are two-dimensional orthogonal codes W 0 , W-1, W 3 , shifted cyclically one code. Accordingly, the elements of resources R92, R102 orthogonalization between levels transfer with other levels of #1, #2, #4 transmission is also implemented in the direction of the axis of frequencies.
In addition, the allocated resource R102 code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (1) is shown on the next element of the resource. In the allocated resource R103 code (-1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource. In the allocated resource R104 code (1) is displayed on the first element of the resource in the direction of the time axis, and the code (-1) is displayed on the next element of the resource.
Accordingly, the code (1, -1, -1, 1) is displayed on the group consisting of the first items of resources in the direction of transfer of the resources allocated to R101 on R104 and code (1, 1, -1, -1) is displayed on the group subsequent resource items. That is, in the resource items in the same podkate resources with R101 on R104 each code is a two-dimensional orthogonal code W 2 appears as shifted to one code to the first elements in the direction of the time axis. Thus, when each code is a two-dimensional orthogonal code W 2 rotated by one code in the direction of the axis of frequencies, each code is a two-dimensional orthogonal code W 2 also rotated by one code in the direction of the time axis.
At this point in the same resource items other levels #1, #2 and #4 transmission codes corresponding two-dimensional orthogonal codes W 0 , W-1, W 3 cycles are shifted by one code and displayed. Accordingly, in the allocated resources with R101 on R104 orthogonalization between levels transfer with other levels of #1, #2, #4 transmission is also implemented in the direction of the time axis. As described above, this is orthogonal to the scheme orthogonalization reference signal demodulation at the levels of transmission from #1 to #4 is implemented in two dimensions in the direction of the time axis and the axis of frequencies. In addition, because orthogonalization between levels of transmission is implemented in a wide range of exciting four allocated capacity, maximum power orthogonal schemes is more casual than in the structure, in which orthogonalization between levels of transmission is implemented through the change of the two-dimensional orthogonal codes in the direction of the display. Accordingly, prevents the increase of the peak power.
Thus, when a two-dimensional orthogonal codes shifted cyclically and displayed orthogonalization between levels from #1 to #4 transfer can be implemented in two dimensions in the direction of the time axis and the axis of the frequency and nature of peak power can be random.
As described above, each of the above options for the implementation of a set consisting of two codes (1) and two codes (-1)appears on the resource items, located in the directions of the axes of time and frequency. Thus, the orthogonalization of the reference signal demodulation between levels of transmission from #1 to #4 can be implemented in two dimensions in the direction of the time axis and the axis of frequencies.
In addition, the above description is based on the example of the reference signal demodulation as the downward reference signal. However, the present invention can be used for other reference signal, for example the reference signal status information channel (CSI-RS, Channel State Information-Reference Signal) to measure the quality indicator channel (CQI) and choice of indicator matrix preliminary coding (PMI). In this case the scheme multiplexing reference signal status information channel is used multiplexing code division (CDM).
In the following description in the modified example of this option exercise assumes that the present invention is used for reference signal status information of the channel as the downward reference signal. This modified example differs from the above described case for only the fact that in the modified example orthogonalized reference signal status information channel, as in the above embodiment orthogonalized reference signal demodulation. Below are described in detail only the specified difference.
Figure 10(a) and 10(b) shows the General scheme illustrating one example of the structure of the downward reference signal proposed in the present invention. Figure 10(a) two of the allocated capacity R31, R32 is located at equal distances from each other in the direction of the axis of frequencies within the same block of resources, and the resources allocated R41 and R42 are located on the same carrier, and that the resources allocated R31, R32, respectively, and away from them for a specified number of characters in the direction of the time axis. In addition, each allocated resource is expressed as [1 subcarriers x serial two characters]. In this case the value of each of the allocated capacity is not limited by this option can be configured flexibly like [two sub-x two consecutive characters].
Each allocated resource multiplexed reference signal status information channel four levels of transmission. The system multiplexing reference signal status information channel is a system multiplexing code division, and four reference signal quality information channel of different levels transmission, multiplexures in one allocated resource, orthogonal to each other. In addition, the reference signal status information channel in each allocated resource orthogonalized by multiplying by two-dimensional orthogonal code (W=[W 0 W 1 ]), shown in figure 10(b). This two-dimensional orthogonal code is the same orthogonal code that is used when orthogonalization reference signal demodulation. The reference signal demodulation, multiplexures in the allocated resources (R31, R42)are multiplexed with the first orthogonal code W 0 and the reference signal status information channel, multiplexures in the allocated resources (R32, R41)are multiplexed with the second orthogonal code W 1 .
Accordingly, the reference signal status information channel, multiplexures in the resources allocated, orthogonalized between allocated resources (R31, R32) and the allocated resources (R41, R42), which are adjacent in the direction of the axis of frequencies. In addition, the reference signal status information channel, multiplexures in the resources allocated, as well orthogonalized between allocated resources (R31, R41) and the allocated resources (R32, R42), which are adjacent in the time domain.
In addition, two-dimensional codes can be used for the orthogonalization of the reference signal status information channel for different users, as in the case of the reference signal demodulation. In this case, for example, the first two code first and second orthogonal codes W 0 W 1 are allocated to a user UE1, and the next two code allocated to the user UE2. With this provision the reference signal status information channel of transmission of user UE1 and reference signals of information on the state channel of transmission of user UE2, multiplexures in one allocated resource, orthogonality with each other. As described above, since the reference signal status information channel resources (R31, R42) orthogonalized using the first orthogonal code W 0 and the reference signal status information channel resources (R32, R41) orthogonalized using the second orthogonal code W 1 , you can achieve orthogonalization between users even in the allocated resources related to the direction of the axis of frequencies and the direction of the time axis.
In the modified example assumes that the same orthogonal codes that are used orthogonalization reference signal demodulation are orthogonalization reference signals of information on the state channel. However, the present invention is not limited. Two-dimensional orthogonal codes can be any of the codes provided that the reference signal status information channel can be orthogonality in the direction of the axis of frequencies, the direction of the time axis and between levels, and can be used by other orthogonal codes, non-orthogonal codes used in the orthogonalization of the reference signal demodulation.
Further, with reference to 11 describes the base radio 40 in accordance with the modified example. This figure 11 structural elements that have the same functions that the structural elements of a base station 20 in accordance with the above option implementation, are denoted by the same reference numbers of positions, and their description is omitted. Base radio 40 has many transmitting antennas #1 to #N, and the data being transmitted and descending reference signal (which contains the reference signal status information channel) at each level of transmission is transmitted through a specified multiple transmit antennas at the same time. At the same time to simplify the description assumes that there are eight transmitting antennas. That is, the maximum number of levels of transmission is eight.
Base radio 40 in accordance with the modified example contains a module 21 of formation of transmitted data, intended for formation of the transmitted data, the module 41 forming an orthogonal sequence reference signal status information channel for building orthogonal reference signal status information channel multiplexer 42 intended for multiplexing of data transmitted and orthogonal reference signals of information on the state of the channel after the preliminary encoding module 43 code generation scrambling for building code scrambling, and module 44 scrambling, intended for realization of scrambling by multiplying orthogonal reference signal status information channel scrambling code. In a base station 40 formation of transmitted data, formation of orthogonal reference signals of information on the state channel, generating code scrambling and multiplexing of data transmitted and orthogonal reference signals of information on the state of the channel is carried out for each level of transmission.
Module 41 forming an orthogonal sequence reference signal status information channel forming an orthogonal reference signals of information on the state of the channel using a two-dimensional orthogonal code (W=[W 0 W 1 ]) in the same way as the module 22 forming an orthogonal sequence reference signal in the above embodiment. Accordingly, the subsequent description of the method of formation of orthogonal reference signal status information channel simplified. In addition, a parallel can work a maximum of eight modules 41 forming an orthogonal sequence reference signal status information channel in accordance with the maximum number of levels of transmission (equal to 8). Therefore, to differentiate between levels of transmission in this description to each level of transfer added identification number "#n".
Modules 41 forming an orthogonal sequence reference signal status information of the channel corresponding to the levels from #1 to #4 assists, form an orthogonal reference signal status information channel by multiplying sequences reference signal status information channel of the appropriate levels of transmission codes first orthogonal code W 0 in ascending order of identification numbers (from #1 to #4). As codes of the first orthogonal code W 0 by multiplying first uses the first code. As a result orthogonal reference signals of information on the state channel, orthogonal to each other at different levels from #1 to #4 assists. In addition, modules 41 forming an orthogonal sequence reference signal status information of the channel corresponding to the levels from #5 to #8 transfer, form an orthogonal reference signal status information channel by multiplying the reference signal status information channel of the appropriate levels of transmission codes second orthogonal code W 1 in order of increasing identification numbers (from #5 to #8). As codes of the second orthogonal code W 1 by multiplying first uses the first code. As a result, the reference signal status information channel, orthogonal to each other at different levels from #5 to #8 transmission.
In addition, the modified example shown in figure 10(a), a four-level reference signals of information on the state of the channel levels from #1 to #4 assists and four-level reference signals of information on the state of the channel levels from #5 to #8 transfer multiplexed on four levels separately. In addition, the resources allocated (R32, R41), multiplexed with orthogonal reference signal status information channel levels from #5 to #8 transmission, and the resources allocated (R31, R42), multiplexed with orthogonal reference signal status information channel levels from #1 to #4 assists, are located so that they are adjacent in the direction of the axis of frequencies and in the direction of the time axis. Accordingly, at each level from #1 to #4 transmission and levels from #5 to #8 transmission reference signals of information on the state channel, adjacent to each other in the direction of the axis of frequencies, orthogonal, and reference signals of information on the state channel, adjacent to each other in the direction of the time axis orthogonal to each other. Thus, the reference signal status information channel can also be orthogonality in the direction of the axis of frequencies, the direction of the time axis and between levels through two-dimensional orthogonal codes.
In this case the module 41 forming an orthogonal sequence reference signal status information channel according to the level of transfer terminal UE1 user uses the first two code from the first and second orthogonal codes W 0 , W 1 for the formation of orthogonal reference signals of information on the state channel. In addition, the module 41 forming an orthogonal sequence reference signal status information channel according to the level of transfer terminal UE2 user uses the following two code from the first and second orthogonal codes W 0 , W 1 for the formation of orthogonal reference signals of information on the state channel. Accordingly, orthogonal reference signals of information on the state of the channel levels #1, #2 transfer terminal UE1 user and orthogonal reference signals of information on the state of the channel levels #1, #2 transfer terminal UE2 user multiplexed in one of the allocated resources. In addition, orthogonal reference signals of information on the state of the channel levels, #3, #4 transfer terminal UE1 user and orthogonal reference signals of information on the state of the channel levels, #3, #4 transfer terminal UE2 user multiplexed in one of the allocated resources.
In addition, when muxing between users of the four-level reference signals of information on the state of the channel levels #1 and
#2 transfer terminal UE1 and UE2 user and a four-level reference signals of information on the state of the channel levels #3 and #4 transfer terminal UE1 and UE2 user are separated and are multiplexed in units of four levels. In addition, the resources allocated (R31, R42), which are allocated orthogonal reference signals of information on the state of the channel levels #1, #2 transfer terminal UE1, UE2 user, and the resources allocated (R32, R41), which are allocated orthogonal reference signals of information on the state of the channel levels, #3, #4 transfer terminal UE1, UE2 user, are located so that they are adjacent in the direction of the time axis and the direction of the axis of frequencies. Accordingly, at the levels of #1, #2 transmission and levels, #3, #4 transfer terminal UE1, UE2 user orthogonalization reference signals of information on the state channel, adjacent in the direction of the axis of frequencies, and orthogonalization reference signals of information on the state channel, adjacent in the direction of the time axis. Thus, when muxing between users is also provided orthogonalization on three axes: axis of frequencies, the time axis and between levels through two-dimensional orthogonal codes.
Module 43 code generation scrambling forms scrambling codes, used for assigning random nature of interference from peripheral cells. Module 44 scrambling multiply orthogonal reference signal status information channel scrambling codes in the same way as the module 24 scrambling described above option implementation. Accordingly, a detailed description of scrambling is here omitted. As for the method of scrambling, can be used for individual cells way of scrambling. When applying for individual cells scrambling scrambling code may be determined by the ID of the honeycomb connection (cell, which takes the channel PDCCH) or can be served from the honeycomb connection of signaling a higher level (broadcast of information etc).
At the following stage of the module 26 preliminary coding provides a multiplexer 42 for multiplexing of data transmitted and orthogonal reference signals of information on the state of the channel in such a way as to prevent overlapping in one unit of resources. This transferred data and orthogonal signals of information on the state channel multiplexed for each of the transmitting antenna.
Module 27 inverse fast Fourier transform (ABPP) performs the inverse fast Fourier transform of transmitted signals in the frequency domain, in which carriers displayed orthogonal reference signal status information channel (subcarrier signals). When the inverse fast Fourier transform signals with frequency components allocated for carriers, converts the signal sequence with transient components. Then the module 28 add a cyclic prefix adds a cyclic prefix, and the transmit power amplifier increases the output. After that, signals are sent from the transmitting antennas.
Module 47 measurement CQI relies on the information about the sequence reference signal status information channel, obtained by decoding channel PDCCH (or channel PDSCH) (set of information about orthogonal reference signal status information channel or information related to two-dimensional orthogonal codes W) to obtain a reference signal status information channel of the appropriate level of transmission, and measures the indicator CQI using reference signal status information channel.
Module 48 choice of indicator RM uses information about the sequence reference signal status information channel, obtained by decoding channel PDCCH (or channel PDSCH) (set of information about orthogonal reference signal status information channel or information related to two-dimensional orthogonal codes W) to obtain a reference signal status information channel of the appropriate level of transmission, and selects the indicator RM level of transfer using reference signal status information channel.
As described above, in accordance with the modified example for the reference signal status information channel is displayed in the resource block two-dimensional way, the reference signal status information channel, adjacent in the direction of the axis of frequencies at the same level of transmission can be orthogonality through orthogonal codes, and the reference signal status information channel is displayed in the same allocated resource, can be orthogonality at different levels of transmission. That is possible orthogonalization reference signal status information channel on three fronts, including the direction along the frequency axis, direction along the axis of time and between levels, through a simple two-dimensional orthogonal codes, making it possible to increase the number of levels of transmission and orthogonalization between users.
In the above description, the reference signal status information channel orthogonalized by multiplying sequences reference signal status information channel on the first and second orthogonal codes (W 0 , W-1 ), but the very two-dimensional orthogonal code W=[W 0 W 1 ] can be used as a sequence reference signal status information channel. In this case, the procedure multiplication sequence reference signal status information channel on the first and second orthogonal codes (W 0 , W-1 ) can be omitted. In addition, the above description is based on the assumption that the orthogonal codes W0, W1 used for sale two-dimensional orthogonal codes, but in the present invention, as shown in Fig(a), two-dimensional orthogonal code can be formed by multiplying orthogonal codes in the time domain and alternating shifts its direction multiplication (direction straight arrows on Fig(a)) in the frequency domain. This method also allows to form an orthogonal codes regardless of whether you have selected the time or frequency for the procedure reverse the expansion of the spectrum.
In addition, reference signals of information on the state channel can also be orthogonality by using the above orthogonal schemes shown in Fig-20.
This invention is not limited to the above options implementation and can be implemented in various modified forms without going beyond the boundaries of the present invention.
Industrial applicability
The present invention can be used for communication systems, including reference signal demodulation and reference signals of information on the state of the channel in descending reference signals.
This application is based on a patent application Japan №2009-149127, filed June 23, 2009, the patent application Japan №2009-231861, filed October 5, 2009, the patent application Japan №2009-252406, filed on November 2, 2009, and patent application Japan №2010-001417, filed January 6, 2010, the content of which is fully incorporated herein by reference.
1. Base radio, containing many transmitting antennas; module of formation of the reference signal for building orthogonal descending reference signals, while the orthogonal descending reference signals use the resources of the Radiocommunication allocated on two axes in the direction of the axis of frequencies and the direction of the axis of time and resources on the radio with the same frequency, allocated in the direction of the time axis, displayed orthogonal code for orthogonalization between levels of transmission; multiplexer intended for multiplexing of data transmitted and orthogonal descending reference signals; and transmitter, designed for transmission of multiple transmitted signals, received by means of multiplexing of data transmitted and orthogonal descending reference signal multiplexer, through transmitting antennas on the levels of transmission, and the direction display orthogonal codes displayed on the resources of the Radiocommunication for orthogonal descending reference signals, related in the direction of the time axis, changes on the back between the resources of the Radiocommunication, related in the direction of the axis of frequencies.
2. Mobile station that contains many receiving antennas; the highlight plugin that is used to select from the received signals at the transfer, at the same time taken by receiving antennas, orthogonal descending reference signals, and orthogonal descending reference signals use the resources of the Radiocommunication allocated on two axes in the direction of the axis of frequencies and the direction of the axis of time and resources on the radio with the same frequency, allocated in the direction of the time axis, displayed orthogonal code for orthogonalization between levels of transmission; assessment module channel, intended for realization of channel estimation of each level of transfer on the basis of orthogonal descending reference signals appropriate levels transfer, allocated by the module allocation; and module demodulation intended for demodulation of data transmitted for each level of transfer on the basis of the valuation channel of transmission through module, channel estimation, and the direction display orthogonal codes displayed on the resources of the Radiocommunication for orthogonal descending reference signals, related in the direction of the time axis, changes to reverse between resources radio, ensuite in the direction of the axis of frequencies.
3. The way of realization of radio communication, including: formation of orthogonal descending reference signals, while the orthogonal descending reference signals use the resources of the Radiocommunication allocated on two axes in the direction of the axis of frequencies and the direction of the axis of time and resources on the radio with the same frequency, allocated in the direction of the time axis, displayed orthogonal code for orthogonalization between levels of transmission; multiplexing of data transmitted and orthogonal descending reference signals on the same level in the transmission; and the transfer of the transferred signals received by the multiplexing of data transmitted and orthogonal descending reference signals, at the levels of transmission when the direction of the display orthogonal codes displayed on the resources of the Radiocommunication for orthogonal descending reference signals, related in the direction of the time axis, alter on the back between the resources of the Radiocommunication, related in the direction of the axis of frequencies.
4. The telecommunication system includes a base station, containing many transmitting antennas; module of formation of the reference signal for building orthogonal reference signals on the basis of the two-dimensional orthogonal code, with orthogonal reference signals orthogonality between downstream supporting signals, adjacent to each other on two axes in the direction of the axis of frequencies and the direction of the time axis at the same level of transmission, and orthogonality at different levels of transmission, assigned to a single resource radio; multiplexer intended for multiplexing of data transmitted and orthogonal reference signals on the same level in the transmission; and transmitter, designed for transmission of the signal being transmitted, received by multiplexing the data transferred and orthogonal reference signals, by transmitting antenna at the same time, levels of transmission; and the mobile station, containing many receiving antennas; the highlight plugin that is used to select from the received signals at the transfer, at the same time taken by receiving antennas, orthogonal descending reference signals; assessment module channel, intended for realization of channel estimation of each level of transfer on the basis of orthogonal descending reference signals appropriate levels transfer, allocated by the module allocation; and module demodulation, intended for demodulation of data transmitted for each level of transfer on the basis of the valuation channel of transmission through assessment module channel; the direction display orthogonal codes displayed on the resources of the Radiocommunication for orthogonal descending reference signals, related in the direction of the time axis, changes on the back between the resources of the Radiocommunication, related in the direction of the axis of frequencies.