Transmitting information using sequences with circular shift

FIELD: information technology.

SUBSTANCE: first and second sequences can be generated via circular shift a base sequence to a first and a second value, respectively. The base sequence can be a CAZAC (constant amplitude zero auto-correlation), PN (pseudorandom noise) sequence or some other sequence with good correlation properties. Circular shift of the first and second sequences can be defined based on a switching pattern. A first modulated sequence can be generated based on the first sequence and a first modulation symbol, and can then be sent over a first time interval. A second modulated sequence can be generated based on the second sequence and a second modulation symbol, and can then be sent over a second time interval. Each modulated sequence can be sent at K successive subcarriers using a localised frequency division multiplex (LFDM) scheme.

EFFECT: high throughput of the system with transmission of control information.

44 cl, 14 dwg

 

This application claims the priority of provisional application U.S. No. 60/884403 "Method and device for switching ACK for randomization of interference when passing upward in accordance with the scheme SC-FDMA", filed on 10 January 2007, the rights to which are transferred to the present applicant and which is incorporated herein by reference.

The level of technology

The technical field

The present disclosure relates to communications and, in particular, to a method for transmitting information in a wireless communications system.

The level of technology

Wireless communication systems are widely implemented to provide various communication services such as voice communication, video transmission, the transmission packet data, broadcast, messaging, etc. These wireless communication system may be a multiple access system capable of supporting communication for multiple users by sharing available system resources. Examples of such multiple access systems include a system of Multiple Access Code Division (Code Division Multiple Access, CDMA)systems, Multiple Access with time Division (Time Division Multiple Access, TDMA)systems, Multiple Access Frequency Division Frequency Division Multiple Access, FDMA)systems, Multiple Access Orthogonal Cha is totem Division (Orthogonal FDMA, OFDMA) and FDMA system with Single-Carrier (Single-Carrier FDMA SC-FDMA).

In the wireless communications system base station may transmit data to one or more User Equipment (User equipment, UE) on the downlink and receive control information from multiple UE for uplink communication. The term top-down communication line (or straight line) refers to the communication link from the base station to the UE, and the term the upward communication line (or reverse link) refers to the communication link from the UE to the base station. In order to improve system performance, it is desirable to transmit control information as effective as possible.

The invention

This document describes how to transfer information using sequence with a cyclic shift. Sequence with a cyclic shift can be obtained by cyclic-shifting the basic sequence in different amounts. The base sequence may be a sequence with Constant Amplitude and Zero Autocorrelation (Constant Amplitude Zero Auto Correlation, CAZAC), a pseudo-random sequence (pseudo-random number, PN) or some other sequence with good correlation properties. Information can be modulated in sequence with a cyclic shift and transmitted according to a certain method is odulele, such as Localized Multiplexing Frequency Division (Localized Frequency Division Multiplexing, LFDM).

In one embodiment, the first sequence can be generated by cyclic-shifting the basic sequence to the first value and the second sequence can be generated by cyclic-shifting the basic sequence for the second value. Cyclic shifts for the first and second sequences can be determined on the basis of template switching, which indicates the amount of cyclic shift in each time interval. Template switching can be determined based on the resources assigned for data transmission, and it can be specific for each cell. The first sequence can be used to exchange (send or receive) information in the first time interval. The second sequence can be used to exchange information during the second time interval. The first and second time intervals may correspond to different periods of transmission symbols, different slots, different podkatom etc.

In one embodiment, to transmit information of the first modulated sequence may be generated based on the first sequence and the first character of the modulation. The second modulated the selected can be generated based on the second sequence and the second symbol modulation. The first and the second modulated sequence may be transmitted in the first and second time intervals, respectively. Each modulated sequence may include K characters, and it can be transmitted over K as each other subcarriers, for example, using LFDM.

In one embodiment, to receive the first and second modulated sequence may be taken in the first and second time intervals, respectively. The first modulated sequence may be correlated with the first sequence to obtain the information transmitted in the first time interval. The second modulated sequence may be correlated with the second sequence to obtain the information transmitted in the second time interval.

Various aspects and features of the disclosure are described in more detail below.

Brief description of drawings

Figure 1 - illustration of a wireless communication system multiple access.

Figure 2 - illustration of transmission for downlink and uplink communication.

Figure 3 - illustration of a structure of transmission for downlink and uplink communication.

Figure 4 - illustration of the basic sequence and a sequence with a cyclic shift.

Figure 5 - illustration of a transmission inform the tion by using a sequence with a cyclic shift.

Figa and 6B is an illustration of the transmission of the ACK and/or CQI.

7 is a structural diagram of eNB and UE.

Fig - illustration processor data transfer and management, as well as the modulator.

Figure 9 - illustration of the demodulator and processor data reception and management.

Figure 10 - illustration of a process for sharing information.

11 is an illustration of a process for transmitting information.

Fig - illustration of the process for receiving information.

Fig - illustration of a device for the exchange of information.

Detailed description

Described herein, the methods can be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other. The terms "system" and "network" are used herein interchangeably. A CDMA system may implement this technology as a Universal Terrestrial Radio access Universal Terrestrial Radio Access UTRA), cdma2000, etc. UTRA includes standard Wideband CDMA (Wideband-CDMA, W-CDMA) and other variants of CDMA. cdma2000 covers standards IS-2000, IS-95 and is-856. A TDMA system may implement this technology as global System for Mobile Communications (Global System for Mobile Communications, GSM). An OFDMA system may implement this technology as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. UTRA, E-UTRA and GSM are part of the standard Universal Mobile Connections and (Universal Mobile Telecommunication System, UMTS). Long term Evolution (Long Term Evolution, LTE) 3GPP is a future release of UMTS that uses E-UTRA, where downlink OFDMA is applied, and on the uplink connection used SC-FDMA. Standards UTRA, E-UTRA, GSM, UMTS and LTE are described in documents of the Partnership Project 3rd generation (3rd Generation Partnership Project, 3GPP). The cdma2000 and UMB are described in documents of the Second Partnership Project 3rd generation (3rd Generation Partnership Project 2, 3GPP2). These various radio technologies and standards are well known. For clarity, certain aspects of these methods are described for LTE, and most of the following description uses terminology LTE.

Figure 1 is an illustration of a system 100 for wireless communication, multiple access, contains many Enhanced Node B (Evolved Node B, eNB) 110. eNB, as a rule, is a fixed station that communicates with many UE. On the eNB may also be referred to as Node B, base station, access point, etc. Each eNB 110 provides coverage due to a particular geographical area. The term "cell" can refer to the smallest coverage area of a certain eNB and/or an eNB subsystem serving this coverage area. Many UE 120 may be scattered throughout the system, and each UE may be stationary or mobile. On UE may also be referred to as mobile stations is, terminal, access terminal, a subscriber unit, a station, etc. UE may be a cellular telephone, Personal Digital assistant (Personal Digital Assistant, PDA), wireless modem, wireless device, handheld device, portable computer, bassology phone, etc. UE may communicate with the eNB by transmission on downlink and uplink communication. The terms "user" and "user equipment ("UE") are used herein interchangeably.

The system can support Hybrid Automatic retransmission (Hybrid Automatic Retransmission, the HARQ). For HARQ on the downlink eNB may perform the transfer for the package and then may perform one or more retransmissions as long as the packet is not correctly decoded by the receiving UE, or until it reaches the maximum number of retransmissions, or until it reaches some other terminating condition. The package can also be referred to as a transport block, the code word etc. HARQ can improve the reliability of the data.

Figure 2 illustrates the transmission on downlink performed by the node eNB, and transmitting uplink communication performed by the user equipment UE. The UE may periodically evaluate the quality of the channel downlink for eNB and passing the diamonds in the eNB Quality Indicator Channel (Channel Quality Indicator, CQI). eNB may use the CQI and/or other information to select the UE for data transmission on the downlink and to select the appropriate speed (e.g., modulation scheme and coding) for data transmission in the UE. eNB may process and transmit data to the UE when there is any data that you want to transfer, and when the available system resources. The UE may process the data transmission on downlink from the eNB and may send the ACK (Acknowledgement, ACK)if the data is decoded correctly or Otherwise Receive (Negative Acknowledgement, NACK), if the data are decoded with an error. eNB may re-transmit data if NACK is received, and may transmit new data if an ACK is received. The UE may also transmit data on the uplink communication in the eNB, when there is any data that you want to send, and when the UE resources are assigned to uplink communication.

In the following description, the terms "ACK" and "ACK information" typically refer to ACK and/or NACK. As shown in figure 2, in any given frame, the UE can transmit data and/or control information, or neither one nor the other. The control information may include ACK, CQI, etc. the Type and amount of control information to be transmitted may depend on various factors, such as whether for MIMO transmission, the number of packets that tre is : send, etc. For simplicity, the main part of the following description is focused on ACK and CQI.

LTE uses Multiplexing Orthogonal Frequency Division (Orthogonal Frequency Division Multiplexing, OFDM) on the downlink and Division Multiplexing Frequency on Single-Carrier (Single-Carrier Frequency Division Multiplexing, SC-FDM) for uplink communication. In the schemes OFDM and SC-FDM bandwidth of the system is divided into multiple (N) orthogonal subcarriers, which are also called tones, elements of the resolution, frequency, etc. of Each subcarriers may be modulated with data. In General, the modulation symbols transmitted in the frequency domain with the use of OFDM in time domain with the use of SC-FDM. In LTE the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (N) may depend on the bandwidth of the system. For example, N may be equal to 128, 256, 512, 1024 or 2048 for bandwidth 1,25, 2,5, 5, 10 or 20 MHz, respectively.

Figure 3 represents a variant of the structure 300 transmission, which can be used for downlink and uplink communication. Temporary transmission line can be divided into many podkatov. Podcat may be of fixed duration, for example, one millisecond (MS), and it can be divided into two slots. Each slot may include Phi is servandae or a variable number of periods of the transmission symbol.

For downlink in each slot may be available S resource blocks, and S may depend on the bandwidth of the system. Each resource block may contain V subcarriers (for example, V=12 subcarriers in one slot. The available resource blocks may be assigned to many UE for transmission on the downlink. In one embodiment, the UE may be assigned one or more pairs of resource blocks in a given potcake. Each pair of resource blocks contains V subcarriers in two slots of one podagra.

For the upward communication line N subcarriers can be divided into a data section and a control section. In one embodiment, the control section may be formed on the edge of the bandwidth of the system, as shown in figure 3. The control section may have a configurable size, which can be selected on the basis of the volume management information, which should be transferred to many UE for uplink communication. The data section may include all subcarriers, which are not included in the control section. According to the variant of figure 3, the data section includes adjacent subcarriers, and one UE can be assigned to all adjacent subcarriers in the data section.

In one embodiment, each pair of resource blocks in the downlink associated with the respective pair of resource blocks in the control section is s in uplink communication, as shown in figure 3. The size of a pair of resource blocks uplink communication can be the same size pair of resource blocks of the downlink. In one embodiment, the pair of resource blocks uplink communication includes V adjacent subcarriers in each slot one podagra. For data transmitted on the pair's resource blocks of the downlink in potcake t, ACK for data and/or other information may be transmitted over a corresponding pair of resource blocks uplink communication. Many pairs of resource blocks of the downlink can be mapped to the same pair of resource blocks uplink communication, as described below.

In one aspect, control information may be transmitted using sequences that are cyclically shifted by different values that can be determined on the basis of template switching. These sequences can be obtained by a cyclic shift of a base sequence having good correlation properties. As the base sequence can be used in different types of sequences. In one embodiment, as the base sequence can be used pseudo-random sequence. In yet another variant as the base sequence can be used to sequence alnost CAZAC. Some examples of CAZAC sequences include the sequence of the Frank sequence Zadoff-Chu, generalized impulsepay (Generalized Chirp-Like, GCL) sequence, etc. of the CAZAC Sequence can provide zero autocorrelation, which represents great value for the correlation CAZAC sequence with a zero offset and zero values for all other shifts. The property of zero autocorrelation is useful for accurate detection of the CAZAC sequence.

In one embodiment, the base sequence can be used to sequence Sadova-Chu, which is expressed as follows:

for k=0,..., K-1, Equation (1)

where k represents the index of the sampling sequence,

K represents the length of the sequence,

λ∈{0,..., K-1} is a basic sequence, and

xλ(k) is a sequence Sadova-Chu for the parameter λ.

The parameter λ of the basic sequence can be selected so that it was relatively simple with respect to the length K of the sequence, which may be denoted as (λ, K)=1. Different base sequences can be defined by different values of λ. For example, if K=12, then λ may be equal to 1, 5, 7 or 11, and through these h the four values of λ can be defined in four basic sequence. The base sequences have zero cross-correlation so that the correlation of the specified base sequence with any other base sequence is equal to zero (exactly) for all shifts.

In one embodiment, each cell can be assigned to one base sequence, and adjacent cells can be assigned to other base sequence. For clarity, most of the following descriptions are shown for one cell, and the base sequence for the cell can be represented as x(k). In one embodiment, the base sequence for a cell can be represented as a sequence Sadova-Chu, respectively, x(k)-xλ(k). In other embodiments, the base sequence for a cell can represent another type of sequence.

The basic sequence x(k) can cyclically shift as follows:

x(k,a)=x((k+a) mod K), for k=0,..., K-1, Equation (2)

where a represents the amount of cyclic shift,

x(k, a) denotes the sequence with a cyclic shift, and "mod" denotes the operation of returning the remainder of the integer division.

A cyclic shift a can have any value in the range from 0 to K-1, that is 0≤a≤K-1.

Figure 4 is an illustration of the basic sequence x(k) and the sequence x(k, a) with a cyclic DM the yoke. The basic sequence x(k) consists of K samples x(0)~x(K-1) index 0~K-1, respectively. The sequence x(k, a) with a cyclic shift consists of the same K samples x(0)~x(K-1), which cyclically shifted by a sample. Thus, the first K-a samples x(0)~x(K-a-1) are mapped to indexes a~K-1, respectively, and the latter a sample x(K-a)~x(K-1) are mapped to index 0~a-1, respectively. Latest a sample of the basic sequence x(k), thus, move to the beginning of the sequence x(k, a) with a cyclic shift.

The amount of cyclic shift may vary over time based on the template switching, which specifies how you want cyclically shift of the base sequence in each time interval. The time interval can be of any duration, in which we apply the specified cyclic shift. To switch character speed value of the cyclic shift may vary for each period of transmission of a symbol, and a in equation (2) may be a function of the transmission period of the symbol or character index. To switch the slot value of the cyclic shift may vary for each slot, and a can be a function of the index of the slot. In General, switching can be performed in a time interval of any duration, for example, within periodperiod symbol, many periods of the transmission symbol, slot, podagra etc. For clarity, the greater part of the following description are provided to switch the character speed, and a sequence with a cyclic shift can be expressed as follows:

x(k,ai(n))=x((k+ai(n)) mod K), for k=0,..., K-1, Equation (3)

where ai(n) represents the amount of cyclic shift for user i in period n transmission symbols, and

x(k,ai(n)) is a sequence with a shift to user i in period n character.

In one embodiment, the sequence with a cyclic shift can be modulated by information in the following ways:

yi(k,n)=si(n)×x(k,ai(n)), Equation (4)

where si(n) represents the symbol modulation, which must be transmitted by user i in period n transmission symbols, and yi(k,n) represents a modulated sequence for user i in period n character.

In one embodiment, shown in Equation (4), each sample sequence with a cyclic shift may be multiplied with the symbol si(n) modulation, which can be a real or complex value. For example, si(n) may represent a symbol modulation Binary Phase manipulation of Binary Phase Shift Keying, BPSK), Quadrature Phase-shift keying (a quadrature Phase Shift Keying, QPSK), Quadrature Amplitude Modulation (a quadrature Amplitude Modulation, QAM), etc.

Figure 5 is an illustration of one way of transmitting information by using a sequence with a cyclic shift. In this example, each slot includes 7 periods of transmission symbols, and one podcat includes 14 periods of transmission symbols with indexes 0~13. In each period n of the transmission symbol sequence x(k,ai(n)) with a cyclic shift can be obtained on the basis of cyclic shift ai(n) for this period, the character is transmitted, as shown in equation (3), and it can be modulated by the symbol si(n) modulation, as shown in equation (4), to obtain a modulated sequence yi(k,n)with K symbols. Referred to K symbols can be transmitted over K as each other subcarriers according to the scheme LFDM, which is one of the varieties of SC-FDM. Transfer to adjacent subcarriers may result in a lower ratio of the peak value to the average, which is desirable. Different sequence with a cyclic shift can be used in different periods of the transmission symbols, and they can be obtained by using different cyclic shifts of ai(n). Different symbols is s s i(n) modulation can be transmitted over a different sequence with a cyclic shift in different periods of the transmission symbol. K subcarriers for the first slot may differ from the K subcarriers for the second slot, for example, as shown in figure 3.

The different switching sequence with a cyclic shift can randomize the interference from other users in the adjacent cells. This randomization of interference of adjacent cells may be useful for control channels, such as channel ACK. The switching sequences can provide the only mechanism for interference randomization, if the sequence with a cyclic shift is not scribblenauts by scrambling sequences, specific cells.

In one embodiment, the base sequence can be determined M different cyclic shifts that are assigned indices of 0 through M-1. A cyclic shift of ai(n) for user i in period n transmission symbols may be selected from M possible cyclic shifts on the basis of template switching. In each period of transmission of a character different users total number up to M can simultaneously transmit data using M-sequence with a cyclic shift generated by M different cyclic shifts. Information from these polzovateley to be restored, since M sequence with a cyclic shift have zero cross-correlation (exactly).

In one embodiment, the template switch for user i can be a predefined template.

For example, according to a predefined template ai(n) may receive an increment at a fixed value of ν in each period of transmission of a symbol that can be expressed as ai(n)=(ai(n)+ν) mod M. In yet another embodiment, the template switch for user i can be a pseudo-random pattern, according to which for ai(n) in each period of transmission of a character can be selected pseudo-random value.

In one embodiment, the M different template switching can be determined on the basis of M different cyclic shifts of a base template switching, according to the following equation:

ai(n)=(a(n)+i) mod M, for

where a(n) is a basic template switching. The basic template switching can be a predefined pattern or a pseudo-random pattern, which can be known to all users. Each user can define their own template switching on the basis of its index i and the base template switching.

In another embodiment, M different template switching can be defined on the OS is the Finance template switching, special for each cell, according to the following equation:

ai(n)=hj((i+n) mod M), for a

where hj( ) is a template switch to cell j. Template switching, which are specific to each cell can represent a predefined pattern or a pseudo-random pattern, which can be known to all users in the cell. Each user can define their own template switching on the basis of its index i and template switching, special for each cell. Different cells may use different template switching, special for each cell, which can lead to randomization of interference of adjacent cells.

In the variants illustrated in equations (5) and (6), M different template switching can be defined for M different values of the index i. These M template switching can be orthogonal relative to each other, so that in any period character no two users will not use the same cyclic shift. M different template switching can be assigned to M different users to transmit information on the same resource block uplink connection.

In the variant with 3 S of pairs of resource blocks may be available for downlink in each potcake, and they can be assigned is isolately total to S. If users up to M can share a pair of resource blocks uplink communication, the number of pairs of resource blocks uplink communication management section can be specified as:

where L represents the number of pairs of resource blocks uplink communications segment management, and "" denotes a ceiling operator that returns the minimum integer that is not less than the argument.

Each pair of resource blocks of the downlink can be mapped to a corresponding pair of resource blocks uplink communication as follows:

s=l×M+m, Equation (8)

whererepresents the index for the pair of resource blocks of the downlink,

l=0,..., L-1 represents the index for the pair of resource blocks uplink communication, and

m=0,..., M-1 is an index for template switching in a pair of resource blocks uplink connection.

M different template switching may be available for each pair of resource blocks uplink communication, and in each period of transmission of a character can choose M different cyclic shift.

Each user can be assigned one pair of resource blocks of the downlink, and M users can simultaneously COI is lesofat one pair of resource blocks uplink communication. In a variant of Equation (8) the first group of M users can be assigned to the pair 0 resource blocks uplink communication, the second group of M users can be assigned to 1 pair of resource blocks uplink communication, etc. to Different groups of users can be assigned to different pairs of resource blocks uplink communication by Multiplexing Frequency Division Frequency Division Multiplexing, FDM). To M users in each group can use the same pair of resource blocks uplink communication by Multiplexing Code Division (Code Division Multiplexing, CDM). The user can be assigned to the pair's resource blocks of the downlink and the template m switch for the pair l resource blocks uplink communication, and the relationship between s and l and m can be in the form of Equation (8). More specifically, l can be defined as l=and m can be defined as m=s mod M, where "" denotes a floor operator that returns the maximum integer not greater than the argument. ai(n) may be equal to m in the assigned transmission period of the symbol.

Equation (8) illustrates only one version of the mapping S of pairs of resource blocks of the downlink L pairs of resource blocks of the uplink communication and the M template switching. Pairs of the resource blocks of the downlink, a pair of resource blocks uplink communication and template switching can be assigned to users in other ways. In General, the user can be assigned any number of pairs of resource blocks of the downlink, any number of pairs of resource blocks uplink communication and any number of template switching depending on various factors such as available resources, the user's requirements in terms of data, etc. for Example, the user may be assigned multiple pairs of resource blocks of the downlink, but only one template switching for one pair of resource blocks uplink connection.

As shown in figure 2, in a given potcake upward communication can only be transmitted ACK or only CQI or ACK and CQI. The user can be assigned a pair of resource blocks uplink communication and template switching for the transmission of ACK and/or CQI, for example, as described above. The user can transmit the ACK and/or CQI to a designated pair of resource blocks uplink communication in a variety of ways.

Figa is an illustration of a variant of the ACK transmission by using a sequence with a cyclic shift. In this embodiment, the ACK may contain 2 bits to confirm receipt of one or two packets. Mentioned 2 bits for the ACK can be to donovani thus, to get 16 bits of code that can be mapped to 8 characters QPSK with si(0) for si(7). Each modulation symbol may be transmitted through the sequence with a cyclic shift, which can be defined as xi(k,n)=x(k,ai(n))=x((k+ai(n)) mod K).

In the variant with figa the first two characters of si(0) and si(1) modulation may be transferred by means of two sequences xi(k,0) and xi(k,1) with a cyclic shift in periods 0 and 1 transmission symbol, respectively. The reference signals may be transmitted in periods 2, 3 and 4 of the transmission symbol. The following four characters si(2)~si(5) modulation can be passed through the four sequences xi(k,S)~xi(k,8) with a cyclic shift in the ages 5~8 transmission symbol, respectively. The reference signals may be transmitted in periods 9, 10 and 11 of the transmission symbol. The last two characters of si(6) and si(7) modulation may be transferred by means of two sequences xi(k,S) and xi(k,8) with a cyclic shift in periods 12 and 13 of the transmission symbol, respectively.

In one embodiment, the reference signal for each period of transmission of a character can be an unmodulated sequence with a cyclic shift for the period of the transmission symbol. In one embodiment, the reference signal is for periods of 2~4 transmission symbol can represent three sequences x i(k,2)~xi(k,4) with a cyclic shift, respectively, and the reference signals for periods 9~11 can be a three sequences xi(k,9)~xi(k,11) with a cyclic shift, respectively. The reference signals can also be generated otherwise.

Figv is an illustration of one way of transmitting CQI or ACK and CQI using sequence with a cyclic shift. CQI may contain (i) the base value of the CQI and the differential CQI value for many packages, or (ii) one or more CQI values for one or more packages. In one embodiment, the CQI may include 8 bits, and the ACK may contain 2 bits. If you pass only CQI, 8 bits for the CQI can be encoded by a block of code (20,8)to get 20 bits of code that can be mapped to 10 characters si(0)~si(9) QPSK. If the transmitted and ACK and CQI, 10 bits for the ACK and CQI can be encoded by a block of code (20, 10)to get 20 bits of code that can be mapped to 10 characters si(0)~si(9) QPSK. In this embodiment, the number of information bits varies depending on whether you passed only CQI, or both ACK and CQI, but the number of modulation symbols remains the same. Each modulation symbol may be transmitted through one sequence cyclically with the shift.

In the variant with figv the first character of si(0) modulation can be transferred through a single sequence xi(k,0) with a cyclic shift in period 0 character. The reference signal may be transmitted in the period of 1 character. The following three characters of si(1)~si(3) modulation can be transmitted through three sequences xi(k,2)~xi(k,4) with a cyclic shift in periods 2~4 transmission symbol, respectively. The reference signal may be transmitted in the period of 5 transmission symbol. The following two symbols si(4) and si(5) modulation may be transferred by means of two sequences xi(k,6) and xi(k,8) with a cyclic shift in periods 6 and 7 of the transmission symbol, respectively. The reference signal may be transmitted in the period of 8 transmission symbol. The following three characters of si(6)~si(8) modulation can be transmitted through three sequences xi(k,9)~xi(k,11) with a cyclic shift in periods 9~11 transmission symbol, respectively. The reference signal may be transmitted in the period of 12 transmission symbol. The last character of si(9) modulation can be transferred through a single sequence xi(k,13) with a cyclic shift in the period of 13 transmission symbol. The reference signal for each period of transmission of a character can be an unmodulated p is the sequence with a cyclic shift for the period of the transmission symbol. The reference signals for periods of 1, 5, 8 and 12 of the transmission symbols can represent four sequences xi(k,1), xi(k,5), xi(k,8) and xi(k,12) with a cyclic shift, respectively.

The modulated sequence only for ACK, or only for CQI or ACK and CQI may be transmitted at different power levels, for example, with different offsets relative to the level of the reference signal. The power levels can be selected to provide the desired reliability for the transmission of ACK and/or CQI.

Figa and 6B are illustrations of specific options send ACK and/or CQI in a pair of resource blocks uplink communication containing 14 periods of the transmission symbol. ACK and/or CQI may also be encoded and mapped to modulation symbols in a different way. The modulation symbols and the reference signal can also be transmitted in the transmission periods of the symbol, different from those shown in figa and 6B.

In General, information can be encoded and mapped to any number of modulation symbols, each modulation symbol may be transmitted using a sequence with a cyclic shift in the transmission period of the symbol. For clarity, a large part of the present description is provided for switching the character speed, and in different periods of the transmission symbol used different sequences with cyclic add the GOM. The switching sequence can also occur at lower speeds. In this case, the same sequence with a cyclic shift may be used in many periods of the transmission symbol, and the set of modulation symbols may be transmitted using the same sequence with a cyclic shift.

7 is a block diagram of a variant of eNB 110 and UE 120, which are examples of the many eNB and many UE with figure 1. In this embodiment, the UE 120 is equipped with T antennas 734a~734t, and the eNB 110 is equipped with R antennas 752a~752r, where T≥1 and R≥1.

At UE 120, the processor 720 of the data transmission and control can accept data flow from a source 712 of data to process (e.g., encode, interleave, scramble and perform character mapping) data flow and provide data symbols. The processor 720 may also receive control information from controller/processor 740, process control information, as described above, and to provide control characters, for example, modulated sequences. The control information may include ACK, CQI, etc. the Processor 720 may also generate and multiplexing symbols of the pilot signal with the data characters and control characters. The data symbol is a symbol for data, a control character CR is dstanley a symbol for control information, and the symbol of the pilot signal is a symbol for the pilot signal, and the symbol may represent a real or complex value. Data characters, control characters and/or symbols of the pilot signal may represent modulation symbols modulated according to a modulation scheme such as Phase shift Keying Phase-Shift Keying, PSK) or Quadrature Amplitude Modulation (a quadrature Amplitude Modulation, QAM). The pilot signal is data that is known a priori as eNB and UE.

The processor 730 MIMO transmission can handle (for example, to perform pre-coding symbols from processor 720 and provide T output streams of symbols in T modulators 732a~732t. The processor 730 MIMO transmission can be omitted, if UE 120 is equipped with one antenna. Each modulator 732 may process its output symbol (e.g., for SC-FDM), to obtain an output sequence of elementary signals. Each modulator 732 may, moreover, be processed (e.g., convert to analog form, amplify, filter, and transform with increasing frequency) its output a sequence of elementary signals and to generate a signal uplink communication. T signals ascending line of modulators 732a~732t can be transmitted from T antennas 734a~734t, respectively.

At eNB 110 antenna 752a~752r can the take the signals uplink communications from the UE 120 and/or other UE. Each antenna 752 may provide the received signal to a respective demodulator 754. Each demodulator 754 may process (e.g., filter, amplify, convert, with decreasing frequency, and digitize) its received signal to obtain samples, and it can further process the sample (e.g., for SC-FDM)to obtain demodulated symbols. The processor 760 reception MIMO transmission may perform MIMO detection on the demodulated symbols from all R demodulators 754a~754r and provide detected symbols. Processor 770 data reception and management can handle (e.g., demodulate, reverse alternation and decode) the detected symbols, provide decoded data to a receiver 772 data and provide decoded control information to a controller/processor 790. In General, the processing performed by the processors 760 and 770, complementary to the processing performed by the processor 730 and 720, respectively, 120.

eNB 110 may transmit data flow and/or control information on the downlink to UE 120. Data flow from a source 778 data and/or control information from controller/processor 790 may be processed by the processor 780 data transmission and control and further processed by processor 782 data MIMO-before the Chi, to obtain R output streams of characters. R modulators 754a~754r can handle R output streams of characters (e.g., for OFDM)to obtain R output streams of elementary signals, and may further process the output elementary streams of signals to obtain R signals downlink, which may be transmitted via the R antennas 752a~752r. At UE 120 signals uplink communication from the eNB 110 may be received by antennas 734a~734t, processed by demodulators 732a~732t and further processed by processor 736 reception MIMO transmission (if applicable) and the processor 738 data reception and management to restore the data flow and the control information transmitted to UE 120.

Controllers/processors 740 and 790 may control the operation of the UE 120 and eNB 110, respectively. Memory 742 and 792 may store data and program codes for UE 120 and eNB 110, respectively. The scheduler 794 may schedule the transmission of multiple UE for data transmission on the downlink and/or uplink communication and may assign resources to the scheduled UES.

Fig is an illustration of a structural schematic of one version of the processor 720 of the data transmission and control, as well as modulator 732a in UE 120 Fig.7. The processor 720 processor 820 transmission control can accept and process control information, for example, ACK and/or CQI, ka is shown in figa and 6B. The processor 820 can generate the sequence with a cyclic shift on the basis of template switching, assigned to UE 120 and may modulate these sequence with a cyclic shift by means of modulation symbols for control information to obtain a modulated sequence. The processor 822 data transmission can handle the data flow and provide data symbols. The processor 730 MIMO transmission may take, for multiplexing and spatial processing characters of the processors 820 and 822, and provide T output streams of symbols in T modulators.

Each modulator 732 can implement SC-FDM in its stream of output symbols. Inside the modulator 732a unit 832 of the Discrete Fourier Transform (Discrete Fourier Transform, DFT) can take Q output symbols in each transmission period of the symbol, where Q represents the number of subcarriers to be used for transmission. Q can be equal to K and to match the number of subcarriers in the assigned pair of resource blocks uplink communication when transmitting only the control information and data is not transmitted. Block 832 may perform a Q-point DFT for Q output symbols and provide Q symbols of the frequency domain. Block 834 spectral shaping can perform spectral shaping on Q symbols is Lam frequency domain and provide Q spectral formed characters. Block 836 mapping symbol to subcarrier may be mapped to the Q spectral shaped symbol Q of subcarriers used for transmission, and to map zero symbols to the rest of subcarriers. Block 838 Inverse Discrete Fourier Transform (Inverse DFT, IDFT) can perform N-point IDFT on the N mapped symbols for the N subcarriers, and to provide N elementary signals in the time domain for useful parts. Generator 840 cyclic prefix can copy the last C of the elementary signals useful parts and add these C elementary signals in the beginning of the useful portion to form an SC-FDM symbol that contains N+C elementary signals. SC-FDM symbol may be transmitted in one transmission period of the symbol, which can be equal to the periods of transmission of N+C elementary signals.

Figure 9 is an illustration of a structural schematic of one version of the demodulator 754a and processor 770 data reception and management in eNB 110 7. In the demodulator 754a block 912 remove cyclic prefix can get N+C received samples in each period of transmission of a character, delete C received samples corresponding to the cyclic prefix and provide N received samples for useful parts. Block 914 DFT can perform N-point DFT on N received samples and to provide N received symbols for the N subcarriers. These N received symbol may contain data and control information from all UE, transmitting at eNB 110. The processing performed for the restoration control information from the UE 120, described below.

Block 916 reverse mapping symbol to subcarrier can provide Q received symbols from the Q subcarriers used by user equipment UE 120, and may discard the remaining received symbols. Block 918 scaling can scale Q of received symbols based on the spectral shaping performed by the user equipment UE 120. Block 920 IDFT can perform a Q-point IDFT on Q scaled symbols and Q provide demodulated symbols. The processor 760 reception MIMO transmission may perform MIMO detection on the demodulated symbols from all R demodulators a~754r to provide demodulated symbols for control information in the processor 930 admission control, and to provide demodulated symbols for the data in the processor 932 data reception. The processor 930 admission control can handle their demodulated symbols and provide decoded control information, for example, ACK and/or CQI. The processor 930 may correlate the demodulated symbols with the corresponding sequence with a cyclic shift, to compare the results of correlation with one or more threshold values and to obtain the decoded control information is the situation on the basis of the comparison results. The processor 932 data reception can handle their demodulated symbols and provide decoded data.

Figure 10 is an illustration of one version of a process 1000 for information exchange in a wireless communications system. Process 1000 may be performed by user equipment UE, the base station (e.g. eNB) or some other object. The first sequence can be generated by cyclic-shifting the basic sequence to the first value (step 1012). The second sequence can be generated by cyclic-shifting the basic sequence for the second value (step 1014). The base sequence may be a CAZAC sequence, a pseudo-random sequence or some other sequence with good correlation properties. Cyclic shifts for the first and second sequences can be determined on the basis of template switching. Template switching can be determined based on the resources assigned for data transmission, and it can be specific for each cell.

The first sequence can be used to exchange (send or receive) information in the first time interval (step 1016). The second sequence can be used for the exchange of information is her second time interval, which is a cyclic shift of the first sequence (step 1018). The third sequence can be used for the reference signal in the third time interval, which represents another cyclic shift of the first sequence. The first or second sequence can also be used for the reference signal. The first and second time intervals may correspond to different periods of the transmission symbol, different slots many periods of the transmission symbol, different podkatom etc.

11 is an illustration of a process 1100 performed by a transmitter, for example, UE, for the transfer of information. The process 1100 is one of the steps 1016 and 1018 with figure 10. The first and second modulation symbols may be generated based on the ACK, CQI and/or other information (step 1112). The first modulated sequence may be generated based on the first sequence and the first modulation symbol (step 1114). The second modulated sequence may be generated based on the second sequence and the second modulation symbol (step 1116). For stage 1114 each of the K samples for the first sequence may be multiplied with the first modulation symbol to obtain a corresponding one character of K symbols to the first modulated after which outlinesthe. Similar processing may be performed for the second modulated sequence.

The first modulated sequence may be transmitted in the first time interval, for example, by passing K characters for the first modulated sequence on K as each other subcarriers in the first time interval (step 1118). The second modulated sequence may be transmitted in the second time interval, for example, by passing K symbols for the second modulated sequence on K as each other subcarriers in the second time interval (step 1120).

Fig is an illustration of a process 1200 performed by a receiver, for example, eNB, for receiving information. The process 1200 is another variant of the steps 1016 and 1018 with figure 10. The first modulated sequence may be adopted (for example, K next to each other subcarriers in the first time interval (step 1212). The second modulated sequence may be adopted (for example, K next to each other subcarriers) in the second time interval (step 1214). The first modulated sequence may be correlated with the first sequence to obtain the information transmitted in the first time interval (step 1216). The second modulated sequence can is t to be correlated with the second sequence, to receive information transmitted in the second time interval (step 1218).

eNB can assign M templates switch M user equipments UE, and M template switching is associated with M different cyclic shifts of the base sequence in each time interval. In each time interval eNB can receive the information transmitted at the same time M user equipments UE using M sequences with different cyclic shifts.

Fig is an illustration of a variant of the device 1300 to communicate in the wireless communications system. The device 1300 includes means for generating the first sequence by a cyclic shift of the base sequence on the first value (block 1012), the means for generating the second sequence by cyclic-shifting the basic sequence for the second value (block 1014), the means for using the first sequence for the exchange of information in the first time interval (block 1016) and the means for using the second sequence for the exchange of information during the second time interval, which is a cyclic shift of the first sequence (block 1018). Modules with Fig may contain processors, electronics devices, hardware devices, electronic components, logic, memory, and the like, or any combination of the above.

Specialists in the art it will be obvious that information and signals may be represented by any technology and fashion from a wide range of such. For example, data, instructions, commands, information, signals, bits, symbols, and elementary signals, which may be, mentioned in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or by any combination thereof.

Specialists in the art also will understand that the various illustrative logical blocks, modules, circuits, and steps of the algorithms described with reference to this disclosure, may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps above have been described in terms of their functionality. The way to implement such functions as hardware or software depends upon the particular application and design constraints imposed on the system as a whole. Specialists in the data is the first field of technology can implement the described functions in different ways for each particular application, but such implementation decisions should not be interpreted as beyond the scope of the present disclosure.

The various illustrative logical blocks, modules, and circuits described in reference to the present disclosure may be implemented or performed by a General purpose processor, a digital signal processor, a specialized chip, programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components or any combination designed to perform the functions described here. General-purpose processor may be a microprocessor, but the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, the combination of a digital signal processor and microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.

The stages of a method or algorithm described in reference to the present disclosure can be implemented directly in hardware through the software module, executable p is ocassion, or by combinations of these two options. A software module may be stored in RAM, flash memory, RAM, ROM, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROM, or any other known form of storage media. Illustrative data medium connected to the processor so that the processor can read information from the data medium and to record information on it. Alternatively, the data medium may be integrated with the processor. The processor and the storage medium can be in a specialized chip. A chip may be in the user terminal. Alternatively, the processor and the storage medium may be located in the user terminal as separate components.

In one or more embodiments described functions may be implemented in hardware, software, firmware or combinations thereof. When implemented in software, the functions may be stored on a machine-readable carrier and transmit it in the form of one or more instructions or code. Machine-readable media includes both computer storage media and transmission media, including an environment that facilitates transfer of a computer program from one place to another. Sredstwami.lechenie can be any available means, which can be accessed by computer or special purpose. As an example, but not limitation, such computer-readable media may include ROM, RAM, EEPROM, CD-ROMs CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code means in the form of instructions or data structures and which can be accessed by a computer or a special purpose or a General processor or special purpose. In addition, any connection is defined as a machine-readable medium. For example, if the software is transmitted from a website, server, or other remote source through a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line Digital Subscriber Line (DSL) or via wireless technologies such as infrared, radio and microwave communication, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave communications, included in the definition of medium. Discs used here in the meaning include CD-dis, the (CD) laser disc, optical disc, Digital Versatile Disc (Digital Versatile Disc, DVD), floppy disk and blu-ray discs, and floppy disks usually reproduce data magnetically, while discs reproduce data optically way through the lasers. Combinations of any of the above types are also included in the scope of the concept of "machine-readable medium".

The foregoing description of the disclosure shown to provide an opportunity for professionals in the art to implement or use the present disclosure. Specialists in the art will be apparent various modifications of the present disclosure, and described here, the key principles can be applied to other variants within the essence or scope of the present disclosure. Therefore, the present disclosure is not limited to the examples described here, and it should match the widest scope in accordance with the disclosed principles and new distinctive features.

1. The device for wireless communication with at least one processor configured to use the first sequence for exchanging the first information in the first time interval, and the first sequence is modulated on the basis of the first information to generate a first modulated sequence, and the first the I modulated sequence is transmitted in the first subset of the set of subcarriers and to use the second sequence for exchanging second information in the second time interval, the second sequence is a cyclic shift of the first sequence and modulated based on the second information to generate a second modulated sequence, and the second modulated sequence is transmitted in the second subset of the set of subcarriers; and a memory connected with the at least one processor.

2. The device according to claim 1, in which the at least one processor configured to generate the first sequence by a cyclic shift of the base sequence on the first value and to generate the second sequence by a cyclic shift of a base sequence at a second value, different from the first value.

3. The device according to claim 2, in which the base sequence is a sequence with constant amplitude and zero autocorrelation (CAZAC).

4. The device according to claim 1, in which the at least one processor configured to generate a first modulated sequence based on the first sequence and the first modulation symbol to the first information, to generate a second modulated sequence based on the second follower of the spine and the second modulation symbol to the second information, to transmit the first modulated sequence in the first time interval and to transmit the second modulated sequence in the second time interval.

5. The device according to claim 4, in which the at least one processor configured to transmit To the characters for the first modulated sequence on consecutive subcarriers in the first time interval and to transmit To the characters for the second modulated sequence on consecutive subcarriers in a second time interval.

6. The device according to claim 4, in which the at least one processor configured to multiply each of the K samples for the first sequence with the first modulation symbol to obtain a corresponding one of the characters for the first modulated sequence, and multiply each of the K samples of the second sequence with the second modulation symbol to obtain a corresponding one of the characters for the second modulated sequence.

7. The device according to claim 4, in which the at least one processor configured to generate first and second modulation symbols based only on the information receiving acknowledgement (ACK), or only the information of the indicator of channel quality (CQI), or information such as ACK and CQI.

8. Elimination of the ETS according to claim 1, in which the at least one processor configured to receive the first modulated sequence in the first time interval, to receive the second modulated sequence in the second time interval, to correlate the first modulated sequence with the first sequence to obtain the first information transmitted in the first time interval, and to correlate the second modulated sequence with the second sequence to obtain second information transmitted in the second time interval.

9. The device according to claim 1, in which the at least one processor configured to receive information transmitted at the same time M user equipments (UE)using M sequences with different cyclic shifts in the first time interval, where M is equal to or greater than one, and M sequences contain the first sequence.

10. The device according to claim 1, in which the at least one processor configured to determine a cyclic shifts for the first and second sequences on the basis of template switching.

11. The device according to claim 10, in which the at least one processor configured to define a template switching based on resources assigned for transmission of the data.

12. The device according to claim 10, in which the template switching is specific for a cell, through which runs the exchange of the first and second information.

13. The device according to claim 1, in which the at least one processor configured to assign M templates switch M user equipments (UE), where M is equal to or greater than one, and M templates switch associated with M different cyclic shifts of the base sequence in each time interval.

14. The device according to claim 1, in which the first and second time intervals correspond to the first and second periods of the transmission symbol, respectively.

15. The device according to claim 1, in which the first and second time intervals correspond to the first and second slots, respectively, and each slot contains a number of periods of the transmission symbol.

16. The device according to claim 1, in which the at least one processor configured to use the third sequence for the reference signal in the third time interval, and the third sequence is another cyclic shift of the first sequence.

17. The device according to claim 1, in which the at least one processor configured to use the first or second sequence for the reference signal in the third time interval.

18. Device is istwo according to claim 1, and the second subset of the set of subcarriers different from the first subset of the multiple subcarriers.

19. The device according to claim 1, whereby the first and second subsets of the set of subcarriers include an equal number of subcarriers corresponding to a whole number of blocks of resources.

20. The device according to claim 1, in which the at least one processor configured to generate a first modulated sequence based on the first sequence and the first modulation symbol to the first information, to generate first character multiple access frequency division with single-carrier (SC-FDMA) using the first modulated sequence displayed in the first subset of the multiple subcarriers, and to generate a second modulated sequence based on the second sequence and the second modulation symbol to the second information, and to generate a second symbol SC-FDMA using the second modulated sequence, are displayed in the second subset of the multiple subcarriers.

21. The device according to claim 1, the second information is the same as the first information.

22. Method for wireless communication, comprising stages, which use the first sequence for exchanging the first information in the first time interval, and the first posledovatelno the ü is modulated based on the first information to generate a first modulated sequence, and the first modulated sequence is passed in the first subset of the set of subcarriers; and use the second sequence for exchanging second information in the second time interval, the second sequence is a cyclic shift of the first sequence and modulated based on the second information to generate a second modulated sequence, and the second modulated sequence is passed in the second subset of the multiple subcarriers.

23. The method according to item 22, further comprising stages which generate the first sequence by a cyclic shift of the base sequence on the first value; and generate the second sequence by a cyclic shift of a base sequence at a second value, different from the first value.

24. The method according to item 22, in which the step of using the first sequence for exchanging the first information to generate the first modulated sequence based on the first sequence and the first modulation symbol to the first information, and transmit the first modulated sequence in the first time interval, and the phase of the second sequence for exchanging second information to generate the second modulated sequence on the core is the so called second sequence and the second modulation symbol to the second information, and transmit the second modulated sequence in the second time interval.

25. The method according to paragraph 24, in which the step of transmitting the first modulated sequence is passed To the characters for the first modulated sequence on consecutive subcarriers in the first time interval, and the step of transmitting the second modulated sequence To transmit symbols for the second modulated sequence on consecutive subcarriers in a second time interval.

26. The method according to paragraph 24, optionally containing phase, which generate the first and second modulation symbols based only on the information receiving acknowledgement (ACK), or only the information of the indicator of channel quality (CQI), or on the basis of information of the ACK and CQI information.

27. The method according to item 22, in which the step of using the first sequence for a first exchange of information take the first modulated sequence in the first time interval and correlate the first modulated sequence with the first sequence to obtain the first information transmitted in the first time interval, and the phase of the second sequence for exchanging second information take a second modulated sequence in the second time interval and q is leraut second modulated sequence with the second sequence to obtain second information, transmitted in the second time interval.

28. The method according to item 22, optionally containing phase, which take the information transmitted at the same time M user equipments (UE) through M sequences with different cyclic shifts in the first time interval, where M is equal to or greater than one, and M sequences contain the first sequence.

29. The method according to item 22, and the second subset of the set of subcarriers different from the first subset of the multiple subcarriers.

30. The method according to item 22, and the first and second subsets of the set of subcarriers include an equal number of subcarriers corresponding to a whole number of blocks of resources.

31. The method according to item 22, in which the use of the first sequence for exchanging the first information contains the steps that generate the first modulated sequence based on the first sequence and the first modulation symbol to the first information, and generate the first character multiple access frequency division with single-carrier (SC-FDMA) using the first modulated sequence displayed in the first subset of the set of subcarriers and the second sequence for exchanging second information contains the steps that generate the second modulated sequence is lnost on the basis of the second sequence and the second modulation symbol to the second information, and generate a second symbol SC-FDMA using the second modulated sequence, are displayed in the second subset of the multiple subcarriers.

32. The method according to item 22, and the second information is the same as the first information.

33. The device for wireless communication, comprising
means for using the first sequence for exchanging the first information in the first time interval, and the first sequence is modulated on the basis of the first information to generate a first modulated sequence, and the first modulated sequence is transmitted in the first subset of the set of subcarriers; and means for using the second sequence for exchanging second information in the second time interval, the second sequence is a cyclic shift of the first sequence and modulated based on the second information to generate a second modulated sequence, and the second modulated sequence is transmitted in the second subset of the multiple subcarriers.

34. The device according to p additionally contains means for generating the first sequence by a cyclic shift of the base sequence on the first value; and means for generating the second sequence by cyclizes is on shifting the base sequence by a second value, different from the first value.

35. The device according to p, in which the means for using the first sequence for exchanging the first information includes means for generating a first modulated sequence based on the first sequence and the first modulation symbol to the first information, and a means for transmitting the first modulated sequence in the first time interval, and means for using the second sequence for exchanging second information includes means for generating a second modulated sequence based on the second sequence and the second modulation symbol to a second information and a means for transmitting the second modulated sequence in the second time interval.

36. The device according to p, in which the means for transmitting the first modulated sequence includes means for transmitting To the characters for the first modulated sequence on consecutive subcarriers in the first time interval, and means for transmitting the second modulated sequence includes means for transmitting To the characters for the second modulated sequence on consecutive subcarriers in a second time interval.

37. The device according to p, further containing a means for having enerali first and second modulation symbols based only on the information receiving acknowledgement (ACK), or only the information of the indicator of channel quality (CQI), or on the basis of information of the ACK and CQI information.

38. The device according to p, in which the means for using the first sequence for exchanging the first information includes means for receiving the first modulated sequence in the first time interval, and means to correlate the first modulated sequence with the first sequence to obtain the first information transmitted in the first time interval, and means for using the second sequence for exchanging second information includes means for receiving the second modulated sequence in the second time interval, and means to correlate the second modulated sequence with the second sequence to obtain second information transmitted in the second time interval.

39. The device according to p, optionally containing means for receiving information transmitted at the same time M user equipments (UE) through M sequences with different cyclic shifts in the first time interval, where M is equal to or greater than one, and M sequences contain the first sequence.

40. The device according to p, the second information is the same as the first information is.

41. Machine-readable media containing instructions that when executed by the machine result in execution of machine operations, which use the first sequence for exchanging the first information in the first time interval, and the first sequence is modulated on the basis of the first information to generate a first modulated sequence, and the first modulated sequence is transmitted in the first subset of the set of subcarriers; and use the second sequence for exchanging second information in the second time interval, the second sequence is a cyclic shift of the first sequence and modulated based on the second information to generate a second modulated sequence, and the second modulated sequence is transmitted in the second subset of the multiple subcarriers.

42. Machine-readable media according to paragraph 41, further containing instructions that when executed by the machine result in execution of machine operations, which generate the first sequence by a cyclic shift of the base sequence on the first value; and generate the second sequence by a cyclic shift of a base sequence at a second value, different from the first value.

43. Mash socitey media at paragraph 41, optionally containing instructions that when executed by the machine result in execution of machine operations, which generate the first modulated sequence based on the first sequence and the first modulation symbol to the first information; generating a second modulated sequence based on the second sequence and the second modulation symbol to the second information; transmit the first modulated sequence in the first time interval; and transmitting the second modulated sequence in the second time interval.

44. Machine-readable media according to paragraph 41, optionally containing commands that when executed by the machine result in execution of machine operations, which receive the first modulated sequence in the first time interval; receive a second modulated sequence in the second time interval; correlate the first modulated sequence with the first sequence to obtain the first information transmitted in the first time interval; and correlate the second modulated sequence with the second sequence to obtain a second information transmitted in the second time interval.



 

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12 cl, 10 dwg

FIELD: communications engineering.

SUBSTANCE: proposed 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.

EFFECT: minimized time for band selection access.

22 cl, 3 dwg, 4 tbl

FIELD: communications engineering.

SUBSTANCE: stationary 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.

EFFECT: provision for using outwardly accessible antenna affording transmission within line-of-sight range.

70 cl, 19 dwg

FIELD: electrical and radio communications; underwater, radio, radio-relaying, and meteorological communication lines.

SUBSTANCE: start-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.

EFFECT: reduced malfunction probability of proposed communication system.

1 cl, 3 dwg

FIELD: mobile telecommunication systems.

SUBSTANCE: device 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.

EFFECT: higher efficiency, higher reliability.

6 cl, 22 dwg

FIELD: engineering of devices and methods for receipt and synchronization in direct digital satellite broadcast system.

SUBSTANCE: satellite 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.

EFFECT: increased quality of radio-signal receipt.

8 cl, 12 dwg

FIELD: engineering of devices for generating series of preamble with low ratio of pike to average power in communications system with orthogonal multiplexing and frequency separation of channels.

SUBSTANCE: in 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.

EFFECT: increased efficiency.

6 cl, 10 dwg

FIELD: electric communications engineering, in particular, engineering of multichannel communication systems.

SUBSTANCE: system 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.

EFFECT: decreased frequency band due to decreased effective width of channel carriers spectrum.

6 dwg, 1 tbl

FIELD: engineering of communication systems, using multi-access layout based on orthogonal multiplexing circuit with frequency division.

SUBSTANCE: communication 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.

EFFECT: increased data transfer speed.

5 cl, 6 dwg

FIELD: electric radio engineering, possible use for increasing quality of electric communication, especially in multi-frequency wireless communication systems.

SUBSTANCE: method 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.

EFFECT: preservation of high channel capacity with simplified correction procedure.

2 cl, 12 dwg

FIELD: the invention refers to the field of radio technique and may be used for transmission of information with the aid of signals with orthogonal frequency multiplexing.

SUBSTANCE: the 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.

EFFECT: increases accuracy of signals.

6 dwg

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