Antenna port mapping method and device for demodulating reference signals

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in mobile communication systems. The method includes determining a transmission rank for downlink transmission to a user terminal; determining one or more reference signal antenna ports for said downlink transmission based on said transmission rank, wherein each port is defined by an group/code pair comprising a code division multiplexing group and orthogonal security code; mapping reference signal antenna ports to group/code pairs for each transmission rank such that the code division multiplexing group and code orthogonal security code are the same for a given antenna port for every transmission rank; and transmitting downlink check symbols through said reference signal antenna ports according to the transmission rank.

EFFECT: high reliability of transmitting information using antenna port mapping for demodulating reference signals.

16 cl, 1 tbl, 7 dwg

 

Background of the invention

The present invention relates, in General, to a reference signal demodulation (DM-RS) for communication systems LTE and LTE-advanced, and more particularly, to the configuration of the antenna ports for user-dependent DM-RS.

The project partnership in the field of communication systems of the 3rd generation (3GPP) is responsible for the standardization of systems UMTS (Universal mobile telecommunications service) and LTE (Long term development). LTE is a communication technology for implementing high-speed packet communication, which can achieve a high speed of data transmission on downlink and uplink, and this technology is thought of as the mobile communication system of the next generation in the context of a UMTS system. The work in 3GPP LTE is also referred to as E-UTRAN (Enhanced universal terrestrial access network). The first version of LTE, referred to as version-8 (Rel-8), can provide a peak speed of 100 Mbps, the delay network is equal, for example, 5 MS or less, a significant increase in spectral efficiency and network architecture designed to simplify network operations, reduce costs, etc. To maintain high speed data transmission in LTE provided the bandwidth of the system width up to 20 MHz. LTE is equally suitable for operation in different frequency bands and �can operate in FDD mode (full-duplex communication system with frequency division multiplexing), and in the TDD mode (full-duplex communication with time division channels). The modulation technique or the transmission scheme used in LTE, known as OFDM (multiplexing orthogonal frequency division).

For mobile communication systems of the next generation, such as IMT-advanced (Advanced international mobile communication) and/or LTE-advanced (LTE Advanced), which is an evolution of LTE, discusses the support band width up to 100 MHz. LTE-advanced can be considered as a future version of the LTE standard, and because it is an evolution of LTE, important backward compatibility, so you can deploy LTE-advanced in the spectrum that is already occupied by LTE. And in the base stations of LTE, and in the base stations of LTE-advanced, which is known as enhanced Node B (eNB or eNodeB) can be used antenna configuration with multiple inputs and multiple outputs (MIMO) and spatial multiplexing for the user's terminal high data transmission speeds. Another example based on MIMO system is a WiMAX system (standard global compatibility of broadband wireless access).

For the implementation of a coherent demodulation of physical channels downlink user terminals require estimates of the descending channel. �more specifically, in the case of OFDM transmission to the user terminal requires a comprehensive assessment of the channel of each subcarrier. One way to ensure the channel estimation in the case of OFDM transmission is introducing a known control characters in a frequency-time grid OFDM. In LTE these control characters collectively are referred to as reference signals downlink.

In LTE systems, there are two types of reference signals downlink: dependent cell reference signals downlink and user-dependent reference signals downlink. Dependent cell reference signals downlink transmitted in each potcake downlink and cover the entire bandwidth of the downlink cell. Dependent cell reference signals downlink may be used for channel estimation and coherent demodulation, except in the case of using spatial multiplexing. Depend on the user terminal, the reference signal used for channel estimation and demodulation of the shared channel downlink in the case of spatial multiplexing. User-dependent reference signals are transmitted in the resource blocks assigned to a specific user terminal for data transmission via owls�estno used channel downlink. Depend on the user terminal reference signals are subjected to the same pre-coding as the data signals transmitted to the user terminal. The present invention is applicable to depend on the user terminal reference signals downlink.

Fig.1 shows a portion of an illustrative time-frequency grid of 50 OFDM for LTE. Generally speaking, a frequency-time grid 50 OFDM is divided into millisecond podckaji. One podcat shown in Fig.1. Each podcat includes some number of OFDM symbols. For communications lines with normal cyclic prefix (CP), which is suitable for use in situations where it is not expected that the dispersion in multipath propagation will be very large, podcat contains fourteen OFDM symbols. Podcat contains twelve OFDM symbols if the extended cyclic prefix. In the frequency domain physical resources are divided into adjacent subcarriers are spaced 15 kHz. The number of subcarriers varies according to the allocated bandwidth of the system. The least element of the time-frequency grid of 50 OFDM is a resource element. The resource element contains one OFDM symbol in one subcarrier.

In order to plan the transmission on a shared channel downlink (DL-SCH) h�state-time resources are allocated in units called resource blocks (RB). Each resource block spans twelve subcarriers (which may be contiguous or distributed across the frequency spectrum) and one half podagra. The term "pair of resource blocks" refers to two consecutive resource blocks, occupying one millisecond podcat entirely.

Some resource elements within each podagra are reserved for transmission of reference signals downlink. Fig.1 shows one illustrative pattern of resource allocation for a reference signal downlink in order to support downstream transmission up to grade 4. Twenty-four resource element within podagra reserved for transmission of reference signals downlink. More specifically, the reference signals demodulation are carried in OFDM symbols 5, 6, 12 and 13 (i.e. in the sixth, seventh, thirteenth and fourteenth symbols) podagra OFDM. Resource elements for reference signal demodulation is distributed in the frequency domain.

Resource elements for reference signal demodulation divided into two groups of multiplexing with code division multiplexing (CDM), referred to here as CDM Group 1 and CDM Group 2. In LTE systems that support the transfer grades from 1 to 4, two CDM groups are used in combination with orthogonal protective codes (OCC) of length 2. �regonalnye protective codes apply to clusters of two control characters. Used here, the term "cluster" refers to the grouping of adjacent (in time domain) control symbols in the same subcarrier. In a variant implementation, shown in Fig.1, each of the subcarriers containing control characters demodulation, includes two clusters.

Fig.2 shows an illustrative allocation of the resource elements for spatial multiplexing, which supports the transfer grades of up to eight. It can be noted that the pattern of resource allocation is the same as the template, resource allocation, shown in Fig.1. To support higher transmission ranks is used OSS of length 4 instead of OSS of length 2. OSS of length 4 is applied on the two clusters of resource elements.

Can be defined using up to eight antenna ports to support up to 8 spatial levels. These 8 antenna ports can be mapped to two CDM groups, each of which uses four OCC. Thus, the antenna ports can be uniquely identified by two parameters, i.e. the index of the CDM group and OCC index, referred to here as the "index pair. Currently, the mapping between antenna ports and index pairs not defined in the LTE standard. Some mappings may be dependent on the grade that requires different about�of obrazenia ports were used for each rank of the transmission. The use of different mappings of ports for different transmission ranks imposes the burden on the user terminal needs to perform channel estimation in a different way when you change the rank of the transmission.

Disclosure of the invention

The present invention provides a unified, independent of the rank of the mapping between antenna ports and group pairs/code. Each antenna port is uniquely associated with one group multiplexing with code division multiplexing (CDM) and one orthogonal security code (OCC). The mapping between antenna ports and group pairs/code is selected so that, for a given antenna port, CDM group and OCC are the same for any rank of the transmission.

One illustrative variant implementation contains implemented by a base station a method of transmitting a reference signal demodulation in the user terminal. The method includes determining the grade of transmission for downlink transmission to the mentioned user terminal; determining one or more antenna ports of the reference signal for the downlink transmission based on the mentioned transfer grade, wherein each port is defined by a pair of group/code that contains the group of multiplexing with code division multiplexing and orthogonal security code; the mapping of antenna ports oporn�x signals on the pair/group code for each rank of the transmission, so the group of multiplexing with code division multiplexing and orthogonal security code are the same for any rank of the transfer; and the transfer of the mentioned control characters downlink through said antenna ports of the reference signals.

Another illustrative variant implementation of the invention contains a base station configured to implement the method described above.

Another illustrative variant implementation of the invention contains implemented by a user terminal, a method of receiving a reference signal, demodulation of the signals transmitted by the base station. Implemented user terminal the method includes determining the grade of transmission for downlink transmission to the mentioned user terminal; determining one or more antenna ports of the reference signal for the downlink transmission based on the mentioned transfer grade, wherein each port is defined by a pair of group/code that contains the group of multiplexing with code division multiplexing and orthogonal security code; the mapping of antenna ports of the reference signals on the pair/group code for each rank of the transmission, so that the group of multiplexing with code division multiplexing and orthogonal security code are the same for any rank of transmission; and reception mentioned control�of intelligent symbols downlink through said antenna ports of the reference signals in accordance with a transfer grade.

Another illustrative variant implementation of the invention includes a user terminal configured to implement the method described above.

A list of the drawings

Fig.1 is an illustration of allocation of the resource elements in the OFDM system for reference signal demodulation ranks to support the transmission of up to 4.

Fig.2 is an illustration of allocation of the resource elements in the OFDM system for reference signal demodulation ranks to support the transmission of up to 8.

Fig.3 is an illustrative image of a MIMO communication system.

Fig.4 - illustrative image processor transmitted signals for OFDM systems.

Fig.5 is an illustration of a display of code words into levels according to one illustrative embodiment of the for transmission ranks from 1 to 4.

Fig.6 is an illustration of an exemplary method of transmitting a reference signal demodulation.

Fig.7 is an illustration of a method of receiving a reference signal demodulation.

Detailed description of the invention

Fig.3 illustrates the system 10 wireless communication with multiple inputs and multiple outputs (MIMO), which includes the base station 12 (referred to as evolved Node In LTE) and the user terminal 14. The present invention will be described in the context of the LTE system, although the present invention is applicable to other types of communication systems. Basic�I station 12 includes a transmitter 100 for transmitting signals to the second station 14 through the communication channel 16, while the user terminal includes a receiver 200 for receiving signals transmitted by base station 12. Specialists in the art it should be clear that each of the base station 12 and user terminal 14 may include a transmitter 100 and a receiver 200 for bidirectional communication.

The information signal is injected into the transmitter 100 to the base station 12. The transmitter 100 includes a controller 110 for controlling the entire operation of the transmitter 100 and the processor 120 of the transmitted signals. The processor 120 of the transmitted signals performs encoding with error correction, displays the input bits to complex modulation symbols, and generates the transmitted signals for each transmitting antenna 130. After conversion with increasing frequency, filtering and amplification, the transmitter 100 transmits the transmitted signals from the respective transmitting antennas 130 via communication channel 16 to the user terminal 14.

The receiver 200 in the user terminal 14 demodulates and decodes signals received on each antenna 230. The receiver 200 includes a controller 210 for controlling the operation of the receiver 200 and the processor 220 of the received signals. The processor 220 demodulates the received signals and decodes the signals transmitted from the first station 12. The output signal from the receiver 200 includes an assessment of IP�one information signal. If no errors this assessment will be the same as the data signal entered in the transmitter 12.

In LTE systems can be used for spatial multiplexing when there are many antennas on the base station 12 and user terminal 14. Fig.4 illustrates the main functional components of the processor 120 of the transmitted signals for spatial multiplexing. The processor 120 of the transmitted signals includes a module 122 display on the levels, the module 124 preliminary coding (precoder) and modules 128 display on resources. The sequence of information symbols (data symbols or control characters) is entered in the module 122 to display the levels. The sequence of symbols is divided into one or two code words. Module display 122 displays on the levels code word forNLlevels depending on the grade of transmission. It should be noted that the number of levels is not necessarily equal to the number of antennas 130. Different code words in the typical case are shown on different levels; however, one codeword may be displayed on one or more levels. The number of levels corresponds to the selected transfer grade. After displaying the levels of the set ofNLcharacters (one character from each level) are linearly combined and displayed�conducted on NAantenna ports module 126 124 preliminary coding. The combining/displaying is described by a matrix of precoder size ofNA×NL.Module display 128 on resources shows the symbols to be transmitted on each antenna port 126, the resource elements designated by the scheduler WT (control access to the communication medium).

When the user terminal 14 is scheduled to receive downlink transmissions on the shared channel downlink (DL-SCH), the scheduler WT in transmitting station 12 allocates the user terminal 14 one or more pairs of resource blocks. As noted earlier, some resource elements in each resource block are reserved for a reference signal downlink. To support downlink transmission containing up to eight levels that depend on the user terminal reference signals downlink required for eight levels. According to the present invention, eight different antenna ports of the reference signals are defined to support the transmission with (up to) eight levels. Each antenna port is uniquely associated with one group multiplexing with code division multiplexing (CDM) and one orthogonal security code (OCC). OCC may contain, for example,Walsh code (Walsh) of length 2 or length-4, although other orthogonal codes may also be used. For the convenience of CDM groups may be identified through the index of the group having a value from 1 to 2, and OSS can be identified by the code index having a value from 1 to 4. The combination of the CDM group and OCC is mentioned here as a pair of group/code.

In the illustrative embodiment, the implementation has two CDM groups and 4 OCC. Thus, there are eight possible combinations CDM group and OCC code (2 groups × 4 OCC), so that may be supported by eight levels. The mapping between antenna ports and group pairs/code is designed so that it is not dependent on rank. More specifically, the mapping between antenna ports and group pairs/code is selected so that for a given antenna port CDM group and OCC are the same for any rank of the transmission.

Table 1 below and Fig.5 illustrates one possible mapping between antenna ports and group pairs/code according to one embodiment of the present invention.

Table 1
The mapping of antenna ports
The antenna portCDM groupOC
111
212
321
422
513
614
723
824

OCC are Walsh codes specified by a matrix of Walsh codes:

The mapping of antenna ports is shown in Table 1, selects CMD Group1 ports 1, 2, 5 and 6 and CMD group 2 ports 3, 4, 7 and 8. OCC1 allocated ports 1 and 3, OCC2 allocated ports 2 and 4, OCC3 allocated ports 5 and 7, and OCC4 allocated ports 6 and 8.

The above mapping of antenna ports is not dependent on rank, so that for a given antenna port will always be used the same CMD group and OSS, regardless of rank transmission. Moreover, the antenna ports associated with a specific�ethno CMD group possess the property of nesting. That is for the set of antenna ports associated with a given CMD group of antenna ports used for low-rank transfer, will be a subset of antenna ports used for higher rank transmission. Thus, the antenna ports associated with a CDM group 1, ports used to transfer grade 1, are a subset of the ports used to transfer grade 2, which are a subset of the ports used to transfer grade 5, which are a subset of the ports used to transfer grade 6. The same property of nesting refers to the antenna ports associated with the CDM group 2.

Another useful feature of the display of antenna ports, shown above, is that the OCC of length 4 on specific antenna ports are identical to the OCC of length 2. For example, to transfer grade 2 Walsh codes of length 4 on antenna ports 1 and 2 are the same as that of Walsh codes of length 2. In the case of single-user (SU) MIMO systems, this property provides the user terminal 14 the ability to use OSS codes of length 2 to perform channel estimation (CE). The use of OSS codes of length 2 for channel estimation allows the receiver 200 to perform the interpolation and, thus, provide more accurate estimates of the channels. Improved channel estimation is�tsya favorable for highly mobile user terminals 14. Thus, for transmission ranks 2, 4 and 5, the receiver can use Walsh codes of length 2 to perform channel estimation for the antenna ports 1 and 2, as shown in Fig.5. Similarly, for transmission ranks 3 and 4, the receiver can use Walsh codes of length 2 to perform channel estimation for the antenna ports 3 and 4. When more than two levels are multiplexed in one CDM group for channel estimation should be used OSS of length 4.

For multi-user (MU) MIMO systems user terminal 14 may not know whether planned in conjunction with other user terminals 14 at the same time, as, for example, in the case of using the transparent MU-MIMO. This lack of knowledge is forcing each user terminal 14 to use OSS of length 4 for channel estimation even for low grade that might slightly reduce efficiency, especially in the case of high speeds. To obtain the advantage associated with OSS of length 2, the authors propose to introduce a single-bit flag in the length of the OSS into control signals for the user terminal 14 more information about the details of the OSS that could therefore increase the efficiency in MU-MIMO. Therefore, this one-bit flag can also provide the proper dynamic switching of SU/MU.

Fig.6 illustrates an exemplary implemented by base station 12 STRs�about 150 transmission reference signal demodulation in the user terminal 14. When the user terminal 14 is scheduled to receive downlink transmissions on the shared channel downlink (DL-SCH), the base station 12 determines the rank of the transmission for downlink transmission to the user terminal 14 (step 152) and defines one or more antenna ports of the reference signals for downlink transmission based on the rank of the transmission (step 154). The processor 130 of the transmitted signals in the base station 12 is configured to display the antenna ports on specific CDM orthogonal group and the security code, so that these CDM the orthogonal group and the security code are the same for a given antenna port for every rank of the transmission. The processor 130 transmitted signals displays the reference signal demodulation on the antenna ports of the reference signal (step 156) in accordance with the transfer grade and transmits reference signals demodulation via the selected antenna ports (step 158).

Fig.7 illustrates an exemplary implemented by the user terminal 14 procedure 160 receiving a reference signal from the base station 12. User terminal 14 determines the rank of the transmission for downlink transmission to the user terminal (step 162), and selects one or more antenna ports of the reference signal based on the transfer grade (stage 164). The processor 230 of the received signals are configured to display the antenna port� on CDM group and CCA so these CDM group and OSS are the same for a given antenna port for every rank transmission (step 166). The processor 230 of the received signals receives reference signals through the selected antenna ports (step 168) and processes these signals.

The mapping of antenna ports is applicable both to single-user MIMO systems and multi-user MIMO systems. It also applies to DwPTS and the advanced CP as well as to multiple component carriers. The mapping of antenna ports may be used to reduce the effect of randomization of peak power.

Naturally, the present invention can be implemented in specific ways that differ from those described here, without departing from the scope and essential characteristics of the invention. Consequently, real options implementation should be considered in all respects as illustrative and non-limiting, and all changes covered by semantic content and equivalence of the appended claims, refers to subject defined by the scope of the invention.

1. Implemented by a base station a method of transmitting a reference signal demodulation in the user terminal, comprising stages on which:
specify the grade of transmission for downlink transmission to the user terminal;
Oprah�elaut one or more antenna ports of the reference signal for this downlink transmission based on the rank of the transmission, each port is defined by a pair of group/code that contains the group of multiplexing with code division multiplexing and orthogonal security code;
display of antenna ports of the reference signals on a pair of group/code, so that the group of multiplexing with code division multiplexing and orthogonal security code are the same for a given antenna port for every rank of the transfer; and
transmit control characters downlink through the antenna ports of the reference signals in accordance with a transfer grade.

2. A method according to claim 1, in which the mapping of antenna ports to group into pairs/code is further adapted so that within a given group multiplexing with code division of channels antenna ports associated with a low grade of transmission, will be a subset of antenna ports associated with a higher rank transmission.

3. A method according to claim 1, wherein the orthogonal protective orthogonal codes contain security codes of length 4, the mapping of antenna ports to group into pairs/code is further adapted so that the selected antenna ports of the orthogonal protective codes of length 4 can be decomposed into two orthogonal protective code of length 2 for channel estimation.

4. A method according to claim 3, additionally containing phase, which sends to the user terminal with�drove management to indicate whether to perform channel estimation using orthogonal protective codes of length 2 or length-4 to the antenna ports.

5. Implemented by a user terminal, a method of receiving a reference signal, demodulation of the signals transmitted by the base station, comprising stages on which:
specify the grade of transmission for downlink transmission to the user terminal;
determine one or more antenna ports of the reference signal for this downlink transmission based on the rank of the transmission, wherein each port is defined by a pair of group/code that contains the group of multiplexing with code division multiplexing and orthogonal security code;
display of antenna ports of the reference signals on a pair of group/code, so that the group of multiplexing with code division multiplexing and orthogonal security code are the same for a given antenna port for every rank of the transfer; and
accept control characters downlink through the antenna ports of the reference signals in accordance with a transfer grade.

6. A method according to claim 5, in which the mapping of antenna ports to group into pairs/code is further adapted so that within a given group multiplexing with code division of channels antenna ports associated with a low grade of transmission, will be a subset of antenna ports, associerade�tions with higher rank transmission.

7. A method according to claim 5, in which the orthogonal protective orthogonal codes contain security codes of length 4, the mapping of antenna ports to group into pairs/code is further adapted so that the selected antenna ports of the orthogonal protective codes of length 4 can be decomposed into two orthogonal protective code of length 2 for channel estimation.

8. A method according to claim 7, additionally comprising stages, which take from the base station control signal and perform channel estimation using orthogonal protective codes or length 2 or length-4 to the antenna ports, depending on the control signal.

9. Base station containing a processor of transmitted signals, and a transmission controller configured:
to determine the grade of transmission for downlink transmission to the user terminal;
determine one or more antenna ports of the reference signal for this downlink transmission based on the rank of the transmission, wherein each port is defined by a pair of group/code that contains the group of multiplexing with code division multiplexing and orthogonal security code;
to display the antenna ports of the reference signals on a pair of group/code, so that the group of multiplexing with code division multiplexing and orthogonal security code are the same for a given antenna port for every RAS�and transmission; and
to transmit control characters downlink through the antenna ports of the reference signals in accordance with a transfer grade.

10. The base station according to claim 9, further configured to display teleports the group into pairs/code so that within a given group multiplexing with code division of channels antenna ports associated with a low grade of transmission, will be a subset of antenna ports associated with a higher rank transmission.

11. The base station according to claim 9, in which the orthogonal protective orthogonal codes contain security codes of length 4, the mapping of antenna ports to group into pairs/code is further adapted so that the selected antenna ports of the orthogonal protective codes of length 4 can be decomposed into two orthogonal protective code of length 2 for channel estimation.

12. The base station according to claim 11, further configured to send to the user terminal the control signal to indicate whether to perform channel estimation using orthogonal protective codes of length 2 or length-4 to the antenna ports.

13. User terminal containing the processor the received signals and the receive controller configured:
to determine the grade of transmission for downlink transmission to the user terminal;
op�edalati one or more antenna ports of the reference signal for this downlink transmission based on the rank of the transmission, each port is defined by a pair of group/code that contains the group of multiplexing with code division multiplexing and orthogonal security code;
to display the antenna ports of the reference signals on a pair of group/code, so that the group of multiplexing with code division multiplexing and orthogonal security code are the same for a given antenna port for every rank of the transfer; and
to accept control characters downlink through the antenna ports of the reference signals in accordance with a transfer grade.

14. User terminal according to claim 13, further configured to display teleports the group into pairs/code so that within a given group multiplexing with code division of channels antenna ports associated with a low grade of transmission, will be a subset of antenna ports associated with a higher rank transmission.

15. User terminal according to claim 13, in which the orthogonal protective orthogonal codes contain security codes of length 4, the mapping of antenna ports to group into pairs/code is further adapted so that the selected antenna ports of the orthogonal protective codes of length 4 can be decomposed into two orthogonal protective code of length 2 for channel estimation.

16. User terminal according to claim 15, additionally configur�dedicated to receive from the base station control signal and perform channel estimation, using orthogonal protective codes or length 2 or length-4 to the antenna ports, depending on the control signal.



 

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FIELD: automatic adaptive high frequency packet radio communications.

SUBSTANCE: each high frequency ground station contains at least one additional high frequency receiver for "surface to surface" communication and at least one additional "surface to surface" demodulator of one-tone multi-positional phase-manipulated signal, output of which is connected to additional information input of high frequency controller of ground station, and input is connected to output of additional high frequency "surface to surface" receiver, information input of which is connected to common high frequency receiving antenna, while control input is connected to additional control output of high frequency controller of ground station.

EFFECT: prevented disconnection from "air to surface" data exchange system of technically operable high frequency ground stations which became inaccessible for ground communications sub-system for due to various reasons, and also provision of possible connection to high frequency "air to surface" data exchange system of high frequency ground stations, having no access to ground communication network due to absence of ground communication infrastructure at remote locations, where these high frequency ground stations are positioned.

2 cl, 12 dwg, 2 tbl

FIELD: radio engineering, in particular, signal transfer method (variants) and device for realization thereof (variants), possible use, for example, in cellular radio communication systems during transmission of information signal in direct communication channel from backbone station to mobile station.

SUBSTANCE: technical result is achieved due to correction of spectrum of copies of information signal being transferred, transferring copies of information signal from each adaptive antenna array in each effective transmission direction, estimating transfer functions of direction transmission channels on basis of pilot signals transferred from each antenna element, on basis of pilot signals for distributed transmission, sent from each adaptive antenna array in each one of effective transmission directions, and also combining two given estimates.

EFFECT: increased efficiency of transmission of information signal in direct communication channel, and, therefore, maximized quality of receipt of information signal at mobile station.

5 cl, 10 dwg

FIELD: wireless communication receivers-transmitters and, in particular, wireless communication receivers-transmitters which use a multi-beam antenna system.

SUBSTANCE: when controlling a multi-beam antenna system for a downstream line of wireless communications, generation of polar pattern and signaling of distribution during transmission in closed contour are combined, each beam signal is adjusted at transmitter on basis of check connection from wireless communication mobile station in such a way, that signals received by wireless communication mobile station may be coherently combined.

EFFECT: increased traffic capacity and productivity of the system, improved power consumption, cell coverage and communication line quality characteristics.

2 cl, 5 dwg

FIELD: method for estimating a channel in straight direction in radio communication systems.

SUBSTANCE: in accordance to the method, in straight direction, beam is created by a set of antennas, and at least one vector is created for beam generation, subject to application for connection of at least one base station to at least one mobile station, is defined by at least one client station and from at least one client station to at least one base station information is transmitted, which contains information about aforementioned at least one beam generation vector. In accordance to the invention, at least one base station transmits information about beam generation vector used for connection of at least one base station to at least one client station, to at least one client station, on basis of which at least one client station estimates the channel.

EFFECT: transmission of information about beam generation vector due to selection and transmission of pilot-signal series.

2 cl, 2 dwg

FIELD: physics, communications.

SUBSTANCE: invention concerns data transfer, particularly frequency-time-space block coding in a transmitter with three transmitting Tx antennae. Input symbol sequence is transferred by three Tx antennae according to permutation method via selected transmission matrix.

EFFECT: increased data transfer speed.

28 cl, 10 dwg

FIELD: physics; communications.

SUBSTANCE: present invention pertains to communication techniques. The transmitting object carries out spatial processing using control matrices, so that data transmission is held in a set of "effective" channels, formed on the real channel used for transmitting data, and control matrices, used for PRTS. Control matrices can be formed by sampling a base matrix, which can be a Walsh or Fourier matrix. Different combinations of scalars are then chosen, each combination of which consists of at least one scalar, of at least row of the base matrix. Each scalar can be a real or complex value. Different control matrices are formed by multiplying the base matrix by each of the different combinations of scalars. Control matrices are different transpositions of the base matrix.

EFFECT: generation and use of control matrices for pseudorandom transmission control (PRTS).

55 cl, 3 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: invention is related to device and method for beams shaping in telecommunication system of mobile communication CDMA with application of intellectual antennas technology, using specified device and method, multiple fixed beams are shaped in sector, and multiple fixed beams are used to shape traffic channel with narrow beams and common channel with sector beams in one and the same intellectual antenna system, and problem of phases discrepancy is solved in appropriate channels due to differences in time and temperature oscillations without application of complicated correcting technology. Since fixed beams in some area correlate and interact with each other, or considerably weaken due to correlative summation of space vectors of every fixed beam in process of common channels transfer in CDMA system with multiple antennas, then appropriate ratio is established between power of pilot channel and traffic channel in coverage area, and signal-noise ratio is increased for signals received by mobile communication station. As a result of addition of optical transceivers system between system of the main frequency band and system of radio frequency transceivers (TRX), the main frequency band system services more sectors. Radio frequency unit is located in close proximity to antennas, and consumed power is reduced accordingly.

EFFECT: increased throughput capacity and efficiency of CDMA system with multiple antennas.

15 cl, 6 dwg

FIELD: information technologies.

SUBSTANCE: separation of transmitting antennas with feedback is applied to special channel of downstream communications line, and separation of transmitting antennas without feedback is applied to control channel of downstream communications line in accordance with high-efficiency method of transmission over upstream communications line. The objective of present invention is to determine how the station with separation during transmission which implements advanced upstream communications line (EUL) should apply separation of transmitting antennas to level 1 confirmation information transmission channels (E-HICH), relative transmission rate channels (E-RGCH) and absolute transmission rate channels (E-AGCH).

EFFECT: providing communications system stability and reliability.

9 cl, 15 dwg

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