Method and apparatus for processing primary and secondary synchronisation signals for wireless communication

FIELD: information technology.

SUBSTANCE: cell search is facilitated by user equipment (UE) in a wireless communication system. In one version, a primary synchronisation code (PSC) sequence may be generated based on a Frank sequence and a constant amplitude sequence which is repeated multiple times. In another version, a set of PSC sequences may be generated based on complementary sequences having good aperiodic correlation properties and efficient implementations. In another version, PSC sequences A+B and B+A may be formed based on Golay complementary sequences A and B, there "+" denotes concatenation. In yet another version, a set of secondary synchronisation code (SSC) sequences may be generated based on a set of base sequences and different modulation symbols of a modulation scheme. Each base sequence may be modulated by each of M possible modulation symbols for the modulation scheme to obtain M different SSC sequences.

EFFECT: shorter cell search time in a wireless communication system.

38 cl, 21 dwg

 

The present application claims the priority of provisional patent application U.S. No. 60/828,055, entitled "Method and apparatus for the P-SCH and S-SCH sequences for E-UTRA", filed October 3, 2007, assigned to the assignee of the present application and incorporated herein by reference.

The technical field

The present disclosure relates in General to communications, and more particularly to a method of synchronization for wireless communication.

The level of technology

Wireless communication systems are widely used to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc., These wireless systems can be multiple access systems capable of supporting multiple users by sharing available system resources. Examples of such multiple access systems include a system of multiple access code division (CDMA)systems, multiple access with time division (TDMA)systems, multiple access frequency division (FDMA)systems, orthogonal FDMA (OFDMA) and FDMA system with single-carrier (SC-FDMA).

The wireless communications system may include any number of base stations that can support communication for any number of units uses the custom equipment (UE). UE (e.g., cell phone) may be within the coverage area of the communication none, one, or multiple base stations at any given moment. UE could only be included or could lose the bond coating and, thus, may not know which base station can be received. The UE may perform a search of the cell to detect the base station and to receive information temporal characteristics (bronirovania) and other information for the detected base stations.

Each base station may transmit the synchronization signals to help UE to search the cell. In General, the synchronization signal can be any signal that allows the receiver to detect the transmitter and to obtain timing and/or other information. The synchronization signals are waste and should be transmitted as efficiently as possible. In addition, the synchronization signals should allow the UE to search for cells quickly and efficiently.

The invention

Describes how to enable search of the cell by the UE in the wireless communication system. In one aspect, the sequence of the primary synchronization code (PSC) can be generated based on the Frank sequence and a sequence of constant amplitude, which is repeated mnogokrat is O. The Frank sequence can provide a good indicator for frequency offset and channel estimation. A sequence of constant amplitude can provide a good indicator of partial correlation. A sequence of constant amplitude may be based on a Golay sequence, M-sequence pseudo-random (PN) sequence, etc. In one embodiment, the repeat sequence is a constant amplitude of length N2can be obtained by repeating N times the sequence of constant amplitude length N. the PSC Sequence of length N2can be generated based on the Frank sequence of length N2and repeat the sequence of constant amplitude of length N2.

In another aspect, the set of PSC sequences can be generated on the basis of complementary sequences with good aperiodic correlation properties and effective implementation. In one embodiment, the PSC sequence A+B and B+A can be formed on the basis of complementary Golay sequences A and B, where "+" denotes concatenation. The detected PSC sequences A+B and B+A can be effectively done with a lot less arithmetic operations than for other types of PSC sequences.

In yet another aspect, the set of sequences secondary to the Yes synchronization (SSC) can be generated on the basis of a set of basic sequences and different characters modulation for the modulation scheme. The base sequence can be a sequence CAZAC (constant amplitude zero autocorrelation), PN-sequences, complementary sequences, etc. Each base sequence can be modulated by each of the M possible symbols modulation for the modulation scheme to obtain M different sequences SSC. The UE may obtain an estimate of the channel based on the detected PSC, and can perform coherent detection with channel estimation to determine the modulation symbol sent in the base sequence.

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

Brief description of drawings

Figure 1 - wireless communication system.

Figure 2 shows as an example the transfer of PSC and SSC.

Figure 3 - correlator Golay complementary sequences.

4 is a block diagram of a node B and UE.

5 is a block diagram CPU data transmission (TX) node Century

Figa and 6B is a block diagram of the two signal generators PSC.

Figs - block diagram of the signal generator SSC.

7 is a block diagram of processor synchronization in UE.

Fig-19 - processes and devices for generating signals PSC and SSC node B and to detect signals PSC and SSC by UE.

Detailed description

The methods described herein can be used for various wireless communication systems, such as DMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement such wireless communication technology as a Universal terrestrial radio access (UTRA), cdma2000, etc. UTRA includes wideband CDMA (W-CDMA) and LCR (Low speed basic assumptions). Technology cdma2000 includes standards IS-2000, IS-95 and is-856. A TDMA system may implement such wireless communication technology such as global system for mobile communications (GSM). An OFDMA system may implement such wireless communication technology, such as E-UTRA (Evolved UTRA), UMB (ultra-speed mobile technology), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc UTRA, E-UTRA and GSM are part of the Universal Mobile Telecommunications System (UMTS). 3GPP LTE (Long-term development of the 3GPP standard) is the planned release of UMTS that uses E-UTRA, use OFDMA in the descending line and SC-FDMA in uplink. UTRA, E-UTRA, GSM, UMTS and LTE are described in documents from an organization 3GPP (the"partnership Project third generation"). cdma2000 and UMB are described in documents from an organization 3GPP2 ("Project 2 third generation partnership"). These various radio technologies and standards known in the art.

Figure 1 shows a wireless communication system 100 with multiple nodes 110. The node B may be a fixed station used for communicating with the UE, and may also abominates is as an enhanced node B (eNB), base station, access point, etc. Each node B 110 provides a bond coating to a specific geographical area. Full coverage of each node B 100 may be divided into a number (e.g., three) smaller areas. In 3GPP, the term "cell" can refer to the smallest coverage area of a node B and/or subsystem of the node B serving this coverage area. In other systems, the term "sector" can refer to the smallest coverage area and/or subsystem serving this coverage area. For clarity in the following description uses the 3GPP concept of cells.

UE 120 may be dispersed throughout the system. UE may be stationary or mobile and may also be referred to as a mobile station, terminal, access terminal, a subscriber unit, a station, etc. UE may be a cellular phone, a personal digital assistant (PDA), wireless modem, wireless device, portable device, a laptop computer, a wireless telephone, etc. UE may communicate with one or more nodes through transmission downstream and upward. The transmission of information down the line (or straight line) refers to the communication line from the node to the UE, and the ascending line (or reverse link) refers to the communication line from the UE to the node C. figure 1 is a solid line with double arrows indicates the relationship between the evil B and UE. Dashed line with a single arrow indicates a UE receiving a signal of the descending line from the node B. the UE may search for cell based on signals from the descending line sent by the nodes Century

In the system 100 nodes 110 may periodically transmit synchronization signals to allow the UE 120 to detect the nodes In and get information such as the temporal characteristics (bronirovanie), frequency shift, the identifier (ID) of a cell, etc. sync Signals can be generated and transmitted in different ways. In one embodiment, which is described in detail below, each node B periodically transmits a signal PSC and signal SSC. The signal PSC can be generated based on the PSC sequence and sent to the primary sync channel (P-SCH). Signal SSC can be generated based on the SSC sequence and sent to the secondary sync channel (S-SCH). The PSC and SSC can also be referred to by other names, such as primary and secondary synchronization sequence.

Figure 2 shows as an example the transfer of PSC and SSC in accordance with one scheme. Schedule time for downward transmission line may be divided into blocks radiokatu. Each radiocat may have a predetermined duration, for example 10 milliseconds (MS). In the diagram shown in figure 2, the PSC is sent near the beginning and behold the single radicata, while SSC is sent immediately before the PSC. In General, the PSC may be sent with any frequency, for example, any number of times in each radiokate. SSC can also be sent with any frequency, which may be the same or different from the frequency of sending the PSC. SSC may be sent next to the PSC (e.g., or immediately before or after the PSC) to estimate the channel from the PSC, could be used for coherent detection of SSC, as described below.

In one scheme, all cells may share the same sequence PSC to allow the UE to detect these cells. Different cells can transmit different sequences of SSC to allow the UE to identify these cells and, possibly, to obtain additional information from cells. The number of SSC sequences may depend on the number of supported identifiers (IDS) of cells and/or other information sent to the SSC.

The UE may perform a search of a cell (for example, when the power is turned on) using two-stage detection process. In one scheme, two-step detection process may include:

1. Phase detection PSC -

a. Discover a cell based on the PSC, the transferred cells

b. Receive timing characteristics symbol and possibly temporal characteristics for each detected cell, and

c. To assess the frequency shift and the click channel for each detected cell; and

2. Phase detection SSC -

a. Identify each detected cell based on SSC passed by the cell, and

b. To obtain the temporal characteristics of the frame, if not provided with a phase detection PSC.

The UE may also receive other information (for example, cyclic prefix, the information transmitting antenna, and so on), based on the PSC and SSC.

Search cell can be relatively complex and may consume significant power from the battery for a portable device. For the detection phase PSC timing characteristics symbol/frame can be unknown, so that the UE may correlate the received signal with a locally generated sequence PSC under different hypotheses temporal characteristics (or time offset), to detect the PSC sequence transmitted by the cell. For the detection phase SSC timing characteristics symbol/frame can be known from the detection phase of the PSC, but there may be many hypotheses SSC (e.g., cell ID) for verification. The UE may correlate the received signal with different sequences of candidate SSC to discover the SSC sequence transmitted by the cell. The sequence of the PSC and SSC can be developed to reduce the complexity of the detection of PSC and SSC by UE.

Low complexity and a high effect is you want to make detection is desirable for the PSC, and for SSC. To improve the efficiency of detection of SSC, the UE may perform coherent detection of SSC for each detected cell based on the channel estimation obtained from the PSC for the cell. The PSC may, therefore, be designed to have good autocorrelation properties, to provide good characteristics for frequency offset and channel estimation and should have a low complexity detection.

The CAZAC sequence can be used for the PSC. Some sample CAZAC sequence includes a sequence of Frank Chu sequence, a generalized chirp-like sequence (GCL), etc. the CAZAC Sequence can provide zero autocorrelation, which has great significance for correlation of the CAZAC sequence with itself at zero offset and zero values for all shifts. The property of zero autocorrelation is advantageous in order to accurately estimate the channel response and to reduce the search time temporal characteristics. However, the GCL sequence and Chu have ambiguity between the time shift and frequency shift, which means that the error bronirovania in the receiver causes a corresponding linear change of phase in the time domain or the equivalent frequency shift in the frequency domain. Thus, the efficiency evaluation of the frequency shift may be degraded, since h is would be known, determined whether the detected frequency offset in the receiver error frequency or error bronirovania in the receiver. The sequence Frank decreased efficiency of partial correlation. Partial correlation refers to the correlation of a received signal with a portion of the sequence instead of the whole sequence. Partial correlation can provide increased detection efficiency at full correlation (which is the correlation over the entire sequence), when a large frequency shift is present in the receiver. Partial correlation can be performed by a suitable length of time may be determined based on the maximum expected frequency offset in the receiver. However, the peak of the autocorrelation sequence Frank may be wide for partial correlation. For good performance, the PSC should provide a good ability to channel estimation without potential problems in the estimation of the frequency shift and no problems with partial correlation.

In one aspect, the PSC sequence may be generated based on the Frank sequence and a sequence of constant amplitude, which is repeated many times. The Frank sequence can provide high efficiency for frequency offset and channel estimation. A sequence of constant amplitude can provide is Ekiti high efficiency at partial correlation.

The Frank sequence f(n) can be expressed as:

where N and p can be any positive integer relatively Prime to each other, and N2- length sequence Frank.

In equation (1) p - index sequence for the sequence Frank. Different sequences of Frank can be generated with different values of R.

A sequence of constant amplitude can be any sequence having a constant amplitude and a good autocorrelation properties. For example, a sequence of constant amplitude can be based on Golay sequences, Golay complementary sequences, M-sequences of maximal length PN sequences, etc. Golay Sequences and Golay complementary sequences of different lengths can be generated by a method known in the art. M-sequence is a PN sequence of maximum length 2L1 and is generated based on the primitive polynomial, where L may be any integer value. A sequence of constant amplitude, length 2Lcan be obtained from the M-sequence of length 2L- 1 adding +1 or -1 to M-sequences so that the number of "+1" is equal to the number of "-1". In General, the length of the serial is a major constant amplitude can be any integer divisor of N 2so the length of the sequence Frank was integral multiple of the length of a sequence of constant amplitude.

In one scheme, a sequence of constant amplitude of length N repeated N times to obtain a repeating sequence of constant amplitude of length N2as follows:

where ci(n) is the i-th copy of the sequence is a constant amplitude, for i = 0,..., N-1,

C0(n) = c1(n) =... = ci(n) =... = cN-1(n), and

c(n) - a repeating sequence of constant amplitude of length N2.

The PSC sequence can then be generated as follows:

p(n) = f(n)·c(n), for n=0,..., N2-1, (3)

where p(n) is the PSC sequence of length N2.

In one illustrative diagram of the PSC sequence of length 64 may be generated by multiplying the Frank sequence of length 64 to a repeating sequence of constant amplitude, length 64. A repeating sequence of constant amplitude can be obtained by repetition of Golay complementary sequences of length 8 {1, 1, 1, -1, 1, 1, -1, 1} eight times.

The work of the Frank sequence of length N2and repeating sequence of constant amplitude (e.g., generated by N repetitions of a sequence of constant amplitude of length N with a good the property autocorrelation) can improve partial correlation and effectiveness of the Association of energy. A repeating sequence of constant amplitude can suppress the interference of multipath propagation, which can enhance the efficiency of partial correlation. After offset correction temporal characteristics and frequency accurate estimate of the channel (due to the properties of CAZAC sequences Frank) can be obtained by removing the PSC sequence, as described below.

In another aspect, the number of PSC sequences can be generated on the basis of complementary sequences with good aperiodic correlation properties and effective implementation. A pair of complementary sequences A and B can be expressed as:

A=[a0a1... aN-1] and (4)

In=[b0b1... bN-1],

where anand bnare the n-th element of complementary sequences A and B, respectively.

The aperiodic autocorrelation function RA(k) for sequences A and aperiodic autocorrelation function RB(k) for the sequence B can be expressed as:

For complementary sequences A and B the sum of their aperiodic correlation functions are zero for all positions except position at zero delay, as follows:

The PSC sequence can Generalova the change on the basis of different types of complementary sequences, such as Golay complementary sequences (GCS), hierarchical Golay complementary sequences, etc. Golay Complementary sequences have good aperiodic correlation properties, as shown in equations (5) and (6). Furthermore, for binary complementary Golay sequences of length N, the correlator GCS can be efficiently implemented using only 2log2(N) complex additions, as described below.

Golay complementary sequences of different lengths can be generated in different ways. Direct method of design and construction for the generation of the various pairs of complementary Golay sequences of any length N is described Marcel J.E. Golay article "Complementary Series", IRE Trans. Inform. Theory, IT-7:82-87, 1961. N different pairs of complementary Golay sequences of length N can be obtained by multiplying the pair of complementary Golay sequences of length N on an N×N Hadamard matrix.

The PSC sequence can be generated on the basis of complementary sequences A and B in various ways. In one scheme, the pair of sequences PSC PSC1and PSC2length 2N can be generated as follows:

PSC1= A + B, and (7)

PSC2= B + A.

In the scheme shown in equation (7), PSC1is generated by concatenating the complementary sequence And the complementary follower of the awn B, and PSC2is generated by the concatenation of complementary sequences with complementary sequence A. for Example, the PSC sequence of length 64 may be generated by the concatenation of complementary sequences A and B of length 32.

In another scheme, a pair of PSC sequences of length N can be generated as follows:

PSC1= A, and (8)

PSC2= B.

In the scheme shown in equation (8), the PSC sequence of length 64 can be generated on the basis of complementary sequences A and B of length 64. The use of longer complementary sequences A and B for the PSC can reduce the complexity of the detection. Longer complementary sequences of length 64 may also have a lower level of side lobe than the complementary sequences of length 32, used for the scheme according to equation (7).

Other PSC sequence can also be generated, for example, the PSC1=A+A and PSC2=B+B. In any case for PSC sequences generated on the basis of complementary Golay sequences A and B, the correlator GCS can be efficiently implemented using properties of complementary Golay sequences.

Figure 3 shows a diagram of the correlator GCS 300 that can be used to perform a sliding correlation discomplementary Golay sequences A and B. The correlator GCS 300 includes S sections, where S = log2(N) and N is the length of complementary Golay sequences. For example, S=5 sections can be used for correlation of complementary Golay sequences of length N = 32.

The first section takes the input samples r(n). Each subsequent section s, for s=2,..., S, takes the results of partial correlation as-1(n) and bs-1(n) from the previous section and provides the results of the partial correlation as(n) and bs(n) to the next section. The last section S provides the results of correlation And(n) and B(n) of complementary Golay sequences A and B, respectively.

Each section includes a delay unit 322, the multiplier 324 and adders 326 and 328. For a section s of the delay unit 322 receives as-1(n) from the preceding section s-l and provides a delay of Dssamples. The multiplier 324 accepts bs-1(n) from the preceding section s-l and multiplies bs-1(n) the weight Ws. The adder 326 sums the outputs of the delay block 322 and the multiplier 324 and provides as(n) in the following section. The adder 328 subtracts the output of multiplier 324 from the output of the delay block 322 and provides bs(n) in the following section.

After an initial delay of N-1 elementary assumptions of the last section S provides one pair of correlation results And(n) and B(n) for each input SEL the RCTs r(n). The adder 326 in the last section S provides the correlation result is A(n) for the correlation of the N most recent input samples with complementary Golay sequence A. the Adder 328 in the last section S provides the correlation result is B(n) for the correlation of the N most recent input samples with complementary Golay sequence B.

Delay from the D1to DSand a weight of W1to WSfor S partitions can be defined on the basis of certain complementary Golay sequences A and B, have been selected for use. In one delay circuit from the D1to DSfor S sections may be such that D1=N/2 for the first section and Ds=Ds-1/2 for each subsequent section. Weight W1to WSfor S sections may be such that Ws∈ {+1,-1} for binary complementary Golay sequences. Various delays from the D1to DSand a weight of W1to WScan be used for different pairs of complementary Golay sequences A and B.

The output section includes a delay blocks 332 and 334 and the adders 336 and 338. The delay blocks 332 and 334 delay correlation results A(n) and B(n) respectively by N sampling periods. The adder 336 summarizes the correlation result is A(n) from the adder 326 with the delayed correlation result In(n-N) c of the delay unit 334 and provides the final is the correlation result for the PSC 1=A+B. the Adder 338 summarizes the result of the correlation In(n) from the adder 328 with the delayed correlation result And(n-N) c of the delay unit 332 and provides the final correlation result for the PSC2=B+A.

For circuit corresponding to equation (7), the correlator GCS 300 may perform correlation for each half of the PSC, to get the results of partial correlation And(n) and B(n) for this half of the PSC. Because the weights from W1to WSequal to +1 or -1, the complexity of the correlation is determined by the number of complex additions/deduct Commission. For each half of the PSC with N = 32, the correlator GCS 300 may perform correlation for both complementary sequences A and B with only 2log2(32)=10 complex additions. Two of the partial correlation A(n) and B(n) can be obtained for the second half of the PSC for this hypothesis n bronirovania. Two of the partial correlation And(n-N) and B(n-N) can be obtained for the first half of the PSC for the same hypothesis bronirovania in the preceding period n-N sample and stored in the delay blocks 332 and 334. Another summation can then be performed by the adder 336 to combine two of the partial correlation A(n) and B(n-N), to obtain the final correlation result for the PSC1=A+B. Another summation can be performed by the adder 338 to combine two of the corre is acii B(n) and A(n-N), to obtain the final correlation result for the PSC2=B+A.

For the circuit shown in equation (7), the partial correlation can be performed for each half of the PSC, to counteract the large frequency shift in the receiver. The difficulty to obtain a rough bronirovania can be reduced using the results of partial correlation. For each hypothesis bronirovania the results of the partial correlations are defined for sequences A+0 and 0+B and can be used to eliminate many candidates. For example, if the results of the partial correlation is below the threshold, then the full correlation for sequences A+B and A+B can be omitted. The same detection methods can also be used for the scheme A+A and B+B.

The results of the partial correlations for each half of the PSC are complex values and can be used to estimate the frequency shift. The phase shift θ(n) can be estimated on the basis of the results of partial correlation as follows:

where "*" denotes complex conjugation. Equation (9a) can be used if you find A+B, and equation (9b) can be used if there is B+A.

Evaluation of the frequency shift can be obtained based on the evaluation of the phase shift as follows:

where TGCS- the duration of complementary Golay sequences in seconds.

The complexity of the detection of PSC sequences A+B and B+A are essentially the same. One of the information bits can be transmitted by passing A+B or B+A. for Example, A+B can be transmitted to transmit the bit value '1'and B+A can be transmitted to transmit the bit value '0'. The information bits may indicate one of two possible lengths of the cyclic prefix or may transmit other information. With two summirovaniye can be tested both hypotheses A+B and B+A, and the information bits can be recovered from the successful hypothesis. If the PSC is transmitted repeatedly in radiokate, it can be transmitted more than one information bit by passing various combinations of PSC sequences in one radiokate.

For sequence diagrams PSC A and B, corresponding to equation (8), one information bit can be transferred by transferring A or B. for Example, the PSC can be transmitted twice in one radiokate, And followed B can be transmitted to transmit the bit value '1'and B followed by A can be transmitted to transmit the bit value '0'. One information bit may also be included for the scheme with PSC=C+A at the PSC passed once or twice in one frame.

It can be shown that N·log2(N)! various pairs to elementarnykh Golay sequences of length N can be generated for a given N. If one pair of complementary Golay sequences is used for all cells, then this pair of GCS may be selected to have (i) low side lobe in aperiodic autocorrelations, or low RA(k) and RB(k) for k=1,..., N-1, (ii) low cross-correlation between two complementary Golay sequences and (iii) low variation in the frequency response to provide a good indicator of channel estimation.

Many pairs of complementary Golay sequences can also be used to generate a larger number of PSC sequences. For example, two pairs of complementary Golay sequences (A1In1) and (A2B2) can be used to generate four sequences PSC, PSC1up PSC4as follows:

With four sequences PSC cells in the system can be divided into four groups 1-4, with each cell belongs to only one group. Groups 1-4 can be associated with a PSC1-PSC4respectively. Cells in each group may use the PSC sequence for that group. The complexity of the detection can be reduced by reusing the results of partial correlation, to obtain the final result of the ATA correlation for different PSC. For example, the partial correlation of A1(n) for Golay complementary sequences And1for the later half of the PSC1can be reused as a result of the partial correlation of A1(n-N) for Golay complementary sequences And1for the earlier half of the PSC3.

In General, cells can be divided into any number of groups, and a sufficient number of PSC sequences can be generated for these groups. Split cells into multiple groups may allow the UE to obtain a more accurate estimate of the channel, since the channel estimation obtained for this sequence, the PSC will experience interference from cells that use this PSC (instead of all cells, if only one PSC will be used by all cells).

The PSC sequence generated on the basis of complementary Golay sequences, may have much lower complexity detection than the PSC sequence generated on the basis of PN-sequences or complex sequences. For each hypothesis bronirovania full correlation for the PSC sequence of length 64 may be made (i) 12 complex additions for complementary Golay sequences, (ii) 63 complex additions to PN-sequence, or (iii) 64 complex multiplications and 63 of complex words is enemy for complex sequences.

For all PSC sequences described above, multiple PSC sequences can be transmitted in one radiokate unevenly and can be placed in radiokate. For example, one PSC sequence can be transmitted at the beginning or near the beginning of radicata duration of 10 milliseconds, and a second PSC sequence may be transferred after about 4.5 milliseconds from the beginning of radicata. In this case, the UE may perform a parallel search pattern and can search over all possible combinations of unevenly spaced templates and choose the best candidate for each hypothesis.

SSC can be used to transfer cell ID and/or other information. A large set of SSC sequences may be determined, and adjacent cells can be assigned a different sequence SSC that can be used to distinguish these cells. For example, a large set of orthogonal or pseudoorthogonal sequences can be used for SSC sequences. These orthogonal or pseudoorthogonal sequence can be generated based on a sequence of Chu or GCL with different indexes sequence PN sequence frequency domain, etc. Different time shifts can also be used to generate many pseud the orthogonal sequences. A set of orthogonal or pseudoorthogonal sequences should be selected on the basis of the correlation properties and complexity. In any case, regardless of the particular type of orthogonal or pseudoorthogonal sequences selected for use, the complexity of the detection may be high for a large set size as a complexity proportional to the number of sequences in the set. The complexity of the detection can be reduced by using a small set, but it may not provide a sufficient number of cell ID.

In yet another aspect of the phase modulated sequence may be used to obtain a larger set and/or to reduce the complexity of detection for SSC. A set of basic sequences can be generated based on the CAZAC sequence with different indexes, sequences, different PN sequences, different complementary sequences, etc. of the CAZAC Sequence may be a sequence of Chu, a Frank sequence, a GCL sequence, etc. Each base sequence can be modulated with different possible modulation symbols from the selected modulation scheme to obtain different possible sequences SSC. If you are using binary phase shift keying (BPSK), ka is the Mae of the base sequence can be modulated two possible symbols BPSK (for example, +1 and -1)to obtain two sequences of SSC. If you are using quadrature phase shift keying (QPSK), each base sequence can be modulated in four possible QPSK symbols (for example, 1+j, -1+j, 1-j and-1-j), to obtain four sequences SSC. The number of SSC sequences may thus be increased by M times, where M is the number of modulation symbols for the selected modulation scheme.

For the detection phase SSC, the UE may first to correlate the received signal with different base sequences. The complexity of the detection can be reduced to 1/M as the number of base sequences is equal to 1/M times the number of sequences SSC. Alternatively, a larger set of SSC sequences may be supported for this complexity detection. In any case, after the detection of specific base sequences of correlation with different base sequences, coherent detection can be performed for the detected base sequence for channel estimation obtained from the PSC to determine which of the M possible sequences SSC was sent. This coherent detection or identification on the basis of the modulated phase can be accomplished with minimal additional operations.

The set of Q Modulare the data phase of the SSC sequences may be indicators similar to the corresponding indicators of the set of Q orthogonal or pseudoorthogonal sequences. However, the complexity of detection can be reduced to 1/M (for example, for 1/4 or 1/2 QPSK to BPSK), or may be permitted in the M times more hypotheses. Higher order modulation (e.g., 8-PSK, 16-QAM, and so on) may also be used to further reduce the complexity of detection, or in addition to increase the number of SSC sequences.

Figure 4 shows the block diagram of the node B 110 and UE 120, which are one of the nodes and one of the UE of figure 1. In this scheme, the node B 110 is equipped with T antennas 424a - 424t, and UE 120 is equipped with R antennas 452a - 452r, where, in General, T≥ 1 and R≥ 1.

At node B 110, the processor 414 transmit (TX) data can receive data for one or more UE from the source data 412. The processor 414 TX data may be processed (e.g., format, encode and interleave) traffic data for each UE based on one or more coding schemes selected for that UE, to obtain the coded data. The processor 414 TX data can then be modulated (or display on the characters) the coded data for each UE based on one or more modulation schemes (e.g., BPSK, QSPK, PSK or QAM)selected for that UE, to obtain the modulation symbols.

TX MIMO processor 420 may multiplexing the modulation symbols for the sun the x UE with pilot symbols, using any multiplexing scheme. The pilot signal is typically a known data that is processed in a known manner and can be used by the receiver for channel estimation and other purposes. TX MIMO processor 420 may process (e.g., pre-encode) multiplexed modulation symbols and pilot symbols and provide T output streams of symbols to T transmitters (TMTR) 422 - 422:. In certain schemes, TX MIMO processor 420 may apply a weight beam forming pattern to the modulation symbols to the spatial control of these characters. Each transmitter 422 may process a respective output symbol, for example, for multiplexing orthogonal frequency division (OFDM)to obtain an output elementary stream parcels. Each transmitter 422 may further process (e.g., convert to analog form, amplify, filter, and transform with increasing frequency) output elementary stream parcels to receive the signal of the descending line. T signals descending line from the transmitter 422 - 422 : can be transmitted via the T antennas 424a - 424t, respectively.

At UE 120 antenna 452a - 452r can receive signals descending line from node B 110 and to provide the received signals to a receiver (RCVR) 454a - 454r, respectively. Each PR is amnic 454 can be converted (for example, to filter, amplify, convert, with decreasing frequency and converted into digital form) corresponding to the received signal to obtain input samples and may further process the input samples (e.g., for OFDM) to obtain received symbols. MIMO detector 460 may receive and process the received symbols from all R receivers 454a - 454r based on the method of processing MIMO receiver to obtain detected symbols, which are estimates of the modulation symbols transmitted by the node B 110. The processor 462 received (RX) data can then be processed (e.g., demodulate, to perform a reversed alternation and decode) the detected symbols and provide decoded data for UE 120 to the receiver 464 data. In General, processing 460 MIMO detector and processor 462 RX data complementary to the processing by TX MIMO processor 420 and the processor 414 TX data to the node B 110.

In the uplink, at UE 120, data traffic from a source 476 data and signaling may be processed by processor 478 TX data is further processed by a modulator 480, converted transmitters 454a - 454r and transmitted to the node B 110. At node B 110, the uplink signals from UE 120 may be received by antennas 424, be transformed by the receivers 422, demodulates the demodulator 440 and processed by the processor 442 RX data to receive traffic data and with whom ginalization, transmitted by UE 120.

Controllers/processors 430 and 470 may control the operation of the node B 110 and UE 120, respectively. The memory 432 and 472 may store data and program IDs for node B 110 and UE 120, respectively. The processor 474 synchronization can search cell based on the input samples, and to provide the detected nodes and their bronirovanie. The scheduler 434 may schedule the UE for transmission of the descending line and/or ascending line and can provide the resource assignments for the scheduled UE.

Figure 5 shows the block diagram of the processor TX 414 at node B 110. The processor 414 TX data generator 510 generates a signal PSC on the basis of one of the methods described herein. Generator 520 generates a signal SSC, as described below. The processor 530 data processes traffic data and provides modulation symbols for data. The processor 540 alarm processing alarm and provides modulation symbols for alarm. A combiner 550 receives and combines the outputs of the generators 510 and 520 and the processor 530 and 540 using multiplexing code division (CDM), multiplexing time division (TDM)multiplexing frequency division (FDM), OFDM and/or some other multiplexing scheme. For example, the signals PSC and SSC can be sent on the assigned set of subcarriers in the assigned period symb is La.

On figa shows the block diagram of the generator a signal PSC, which is one option generator 510 signal PSC in figure 5. In the generator a signal PSC generator 610 generates the Frank sequence of length N2for example, as shown in equation (1). Generator 612 generates a sequence of constant amplitude, which may be a segment of a Golay sequence, a PN sequence, etc. Block 614 repeat repeats a sequence of constant amplitude repeatedly and provides a repeating sequence of constant amplitude of length N2. The multiplier 616 multiplies the Frank sequence in a repeating sequence of constant amplitude element and provides the PSC sequence.

Generator 618 signal generates a signal PSC, based on the PSC sequence. In one embodiment, for processing in the time domain, the generator 618 may interpolate the PSC sequence of length N2to get the signal PSC time domain length K that can be sent in K periods elementary parcels. In one embodiment, for processing in the frequency domain, the generator 618 may display N2samples PSC sequence on the N2serial (or evenly spaced) subcarriers to display zero values on the remaining subcarriers and execute education is Noah discrete Fourier transform (IDFT) on the resulting values, to get the signal PSC time domain length K. for processing the time domain, and for processing the frequency domain oscillator signal 618 may append a cyclic prefix of length L, where L can be chosen based on the expected increase in the delay in the system. L may be a constant value or a configurable value. The generator signal 618 may also generate a signal PSC another way.

Figv shows a block diagram of the oscillator signal 510b PSC, which is another option generator 510 signal PSC in figure 5. In the generator signal 510b PSC generator 620 generates a Golay complementary sequences A and B of length n Block 622 may concatenate complementary sequences A and B as A+B, B+A, A+A or B+B. Alternatively, block 622 may simply provide one of the complementary sequences A and B. the signal Generator 624 generates a signal PSC based on the PSC sequence, as described above for figa.

On figs shows the block diagram of the generator 520 signal SSC for 5. ID cell, and/or other information can be provided to the generator 630 and the selector 632. Generator 630 may select or generate a base sequence based on the received information, and the selector 632 can choose the symbol modulation based on the received information. The base sequence may be a sequence is almostly CAZAC, PN sequence, a Golay sequence, etc. and can be selected from a number of base sequences that are available for use. The multiplier 634 multiplies each element of the base sequence on the integrated value for the selected symbol modulation and provides the SSC sequence. Generator 636 signal generates a signal SSC based on the SSC sequence, for example, by using the processing time domain or processing the frequency domain described above for figa.

Fig.7 shows the block diagram of the processor 474 synchronization UE 120 in figure 4. The processor 474 synchronization includes the PSC detector 710 and the SSC detector 730. The PSC detector 710 may detect each of the possible sequences of PSC in each hypothesis bronirovania, for example each sampling period. For clarity, the following describes the detection of PSC for one PSC sequence for one hypothesis of bronirovania (for example, the current period n of the sample). The buffer 708 receives samples and stores the input samples and provides a corresponding input sample to the detector PSC 710 and the SSC detector 730.

In the PSC detector 710 partial correlator PSC 712 performs a partial correlation on the input samples with sequence segments PSC and provides the results of the partial correlation for segments of the PSC to evaluate hypotheses bronirovania. For the sequence PC, generated based on the Frank sequence and a repeated sequence of constant amplitude, the partial correlation for one segment PSC length N can be obtained (i) by multiplying the N input samples into N elements of the segment of the PSC and (ii) coherent accumulation of N results of the multiplication. Coherent accumulation refers to the accumulation of complex values, while non-coherent accumulation refers to the accumulation of amplitude or power. Partial correlation may also be performed on segments PSC other lengths that are integer multiples of N, for example N2/2. For PSC sequence generated on the basis of complementary Golay sequences, partial correlator PSC 712 can be implemented with the correlator GCS 300 in figure 3 and can provide correlation results for the two halves of the PSC sequence to evaluate hypotheses bronirovania. The adder 714 decoherence accumulates the results of the partial correlations for all segments of the PSC and provides the final correlation result for hypothesis bronirovania. A peak detector 716 determines whether the PSC sequence found for hypotheses bronirovania, for example, comparing the final correlation result with a threshold. If the PSC is detected, the detector 716 generates a characteristic of the detected PSC and its bronirovanie characters./p>

If the PSC sequence is found, the block 718 may estimate the frequency shift on the basis of the results of partial correlation of block 712, for example, as shown in equations (9) and (10). Unit 722 receives the input selection for the detected PSC and removes the estimated frequency shift of these samples. The DFT block 724 converts the adjusted sample rate from block 722 and provides the symbols of the frequency domain. Estimator 726 channel deletes the detected PSC sequence of symbols from the frequency domain and provides the gain of the channel for different subcarriers.

The SSC detector 730 detects SSC whenever the detected PSC. In the SSC detector 730 blocks 732 and 734 process input samples for a potential SSC like blocks 722 and 724, respectively. Coherent detector 736 performs coherent detection of frequency domain symbols at block 734 with reinforced channels with block 726 and provides detected symbols. The correlator 738 base sequence correlates the detected symbols with each of the base sequences of the candidate (after DFT) and provides a correlation result for each of the basic sequence. The detector 740 base sequence receives the correlation results for all base sequence candidate and determines whether the detected kind of the base sequence. The EU and the base sequence was detected, the unit 742 determines which symbol modulation was sent to the base sequence. Block 744 then determines what sequence SSC was adopted, based on the detected base sequence and the detected symbol modulation, and provides the ID of the cell that corresponds to this sequence SSC. Block 744 may also provide the detected bronirovanie frame.

7 shows a specific circuit of the detector PSC 710 and SSC detector 730. Detection of PSC and SSC detection can also be performed in other ways. For example, to detect SSC block 738 may correlate the detected symbols with each of the possible phase modulated base sequence, and block 742 may be omitted. The channel estimation and coherent detection can be performed in the frequency domain (as shown in Fig.7) or in the time domain.

On Fig shows a variant of a process 800 for generating a signal PSC. Process 800 may be performed by a node B, or some other transmitter. The node B may receive the PSC sequence generated based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude (block 812). A sequence of constant amplitude may be based on a Golay sequence,M-sequence, PN-sequence, etc. In one embodiment, the repeating sequence of constant amplitude of length N2can be obtained by repeating N times the sequence of constant amplitude length N. the PSC Sequence of length N2can be generated based on the Frank sequence of length N2and repeating sequence of constant amplitude of length N2.

The node B may generate the signal PSC based on the PSC sequence (block 814). The signal PSC can be generated by interpolation of the sequence of the PSC and the addition of cyclic prefix. Alternatively, the signal PSC can be generated by mapping the elements of the PSC sequence to a set of subcarriers, the display of zero values on the remaining subcarriers, the transformation of the displayed elements and zero values to obtain a sequence of time domain samples, and the addition of cyclic prefix to the sequence of samples in the time domain.

Fig.9 shows the diagram of a device 900 for generating a signal PSC. The device 900 includes a means for receiving PSC sequence generated based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude (module 912), and means the La signal generation PSC based on the PSC sequence (module 914).

Figure 10 shows a diagram of a process 1000 for detecting signal PSC. Process 1000 may be performed by UE or some other receiver. The UE may receive the PSC sequence generated based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude (block 1012). The UE may correlate the received signal with the PSC sequence to detect cell (block 1014). To block 1014 UE may perform a partial correlation of a received signal with many segments of the PSC sequence, with each segment covering at least one repetition of a sequence of constant amplitude. UE can decoherence accumulate the results of partial correlation for many segments of the PSC sequence to get the full correlation. The UE may then detect the PSC sequence in the received signal based on the result of the full correlation.

The UE may receive the first and second results of the partial correlations for the first and second parts (e.g., half) of the PSC sequence and can assess the frequency shift on the basis of these results, partial correlation. The UE may obtain an estimate of the channel based on a received signal and the sequence of the PSC (block 1016). UE can detect PEFC is the SSC sequence in a received signal, based on the evaluation of the channel (block 1018).

11 shows a diagram of an apparatus 1100 for detecting signal PSC. The device 1100 includes means for receiving the PSC sequence generated based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude (module 1112), means for correlating the received signal with the PSC sequence for detection of cells (module 1114), means for obtaining a channel estimation based on the received signal and the sequence of the PSC (module 1116) and means for detecting the SSC sequence in a received signal, based on the evaluation of the channel (module 1118).

On Fig shows a diagram of a process 1200 for generating a signal PSC. Process 1200 may be performed by a node B, or some other transmitter. The node B may receive the PSC sequence from multiple PSC sequences generated based on at least one pair of complementary sequences, for example of complementary Golay sequences (block 1212). At least one pair of complementary sequences may include complementary sequences A and B, and the set of all sequences PSC may include the first PSC sequence A+B and the second series is here PSC B+A.

The node B may generate the signal PSC based on the PSC sequence (block 1214). The node B may generate a sequence of samples in the time domain or the time domain and the frequency domain, based on the PSC sequence. The node B may then generate a signal PSC, adding a cyclic prefix to the sequence of samples in the time domain.

On Fig shows a diagram of an apparatus 1300 for generating a signal PSC. The device 1300 includes means for receiving a sequence of PSC from multiple PSC sequences generated based on at least one pair of complementary sequences (module 1312), and means for generating a signal PSC based on the PSC sequence (module 1314).

On Fig shows a diagram of a process 1400 for detecting signal PSC. The process 1400 may be performed UE or some other receiver. The UE may receive the PSC sequence from multiple PSC sequences generated based on at least one pair of complementary sequences (block 1412). The UE may correlate the received signal with the PSC sequence to detect cell (block 1414). At least one pair of complementary sequences may include complementary sequences A and B, and the set of all sequences PSC may include SEB is the first PSC sequence A+B and a second PSC sequence B+A. The UE may receive the first and second correlation results for correlations of the first part of a received signal with complementary sequences A and B, respectively. The UE may receive the third and fourth correlation results for correlations of the second part of the received signal with complementary sequences A and B, respectively. The UE may detect the first and second PSC sequence in a received signal based on the first, second, third and fourth correlation results.

The UE may obtain an estimate of the frequency shift based on the first and the fourth results of correlation or the first and second correlation results. The UE may obtain an estimate of the channel based on a received signal and the sequence of the PSC (block 1416). The UE may then detect the SSC sequence in a received signal, based on the evaluation of the channel (block 1418).

On Fig shows a diagram of the device 1500 to detect the signal PSC. The device 1500 includes means for receiving a sequence of PSC from multiple PSC sequences generated based on at least one pair of complementary sequences (module 1512), means for correlating the received signal with the PSC sequence for detection of cells (module 1514), means for obtaining a channel estimation based on a received signal and placentas is the activities of the PSC (module 1516), and means for detecting the SSC sequence in a received signal, based on the evaluation of the channel (module 1518).

On Fig shows a diagram of a process 1600 for generating signals SSC and PSC. The process 1600 may be performed by a node B, or some other transmitter. The node B may generate the signal PSC based on the PSC sequence (block 1612). The node B may receive the SSC sequence generated based on the base sequence and symbol modulation from a modulation scheme (block 1614). The SSC sequence can be generated by multiplying each element of the base sequence on the integrated value for the symbol modulation. The base sequence and the modulation symbol can be selected based on the cell ID and/or other information.

The node B may generate a signal SSC, based on the SSC sequence, for example, in the time domain or the frequency domain, as described above (block 1616). The node B may transmit a signal SSC after the signal PSC (block 1618).

On Fig shows a diagram of an apparatus 1700 for generating signals SSC and PSC. The device 1700 includes means for generating a signal PSC, based on the PSC sequence (module 1712), means for receiving the SSC sequence generated based on the base sequence and symbol modulation from a modulation scheme (module 1714), means for generating signal is La SSC, based on the SSC sequence (module 1716), and means to transmit a signal SSC after the signal PSC (module 1718).

On Fig shows a diagram of a process 1800 for detecting signals SSC and PSC. The process 1800 may be performed by UE or some other receiver. UE can detect the PSC sequence transmitted by the cell (block 1812). The UE may correlate the received signal with a set of base sequences to detect the base sequence transmitted by the cell (block 1814). UE can detect the modulation symbol transmitted in the detected base sequence (block 1816). The UE may then detect the SSC sequence transmitted by the cell based on the detected base sequence and the detected symbol modulation (block 1818).

The UE may obtain an estimate of the channel based on the detected PSC sequence, and can detect the symbol modulation based on channel estimation. In one embodiment, the blocks 1814 and 1816 UE may receive the gain channel for multiple subcarriers based on the detected PSC sequence, to evaluate the frequency shift based on the detected PSC sequence, remove the estimated frequency shift of the input samples to obtain the adjusted sample rate, convert the adjusted sample rate to get the character frequencies of the Oh region, to perform coherent detection of frequency domain symbols with reinforced channels to obtain detected symbols, and to detect the base sequence and the symbol modulation based on the detected symbols, as described above for 7. The UE may determine the cell ID and/or other information based on the detected base sequence and the detected symbol modulation (block 1820).

On Fig shows a diagram of the device 1900 to detect signals PSC and SSC. The device 1900 includes means for detecting the PSC sequence transmitted by the cell (module 1912), means for correlating the received signal with a set of base sequences to detect the base sequence transmitted by the cell (module 1914), means for detecting the modulation symbol transmitted in the detected base sequence (module 1916), means for detecting the SSC sequence transmitted by the cell based on the detected base sequence and the detected symbol modulation module (1918), and means for determining the cell ID and/or other information based on the detected base sequence and the detected symbol modulation module (1920).

Modules figure 9, 11, 13, 15, 17 and 19 may include processors, electronic devices, hardware among the STV, electronic components, logical circuits, memories, or combinations specified.

Specialists in the art should understand that information and signals may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and code elements that can be referred to in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination of these means.

Specialists in the art should understand that the various illustrative logical blocks, modules, circuits, and steps of the algorithms described in connection with open options for implementation, can be implemented by electronic hardware, computer software, or a combination of these means. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps described above in terms of their functionality. Then, if implemented features such as hardware or software depends on the specific application and limitations in the project is the formation, imposed on the system as a whole. Specialist in the art can implement the required functionality in different ways for each particular application, but such solutions should not be interpreted as causing a departure from the scope of the present invention.

The various illustrative logical blocks, modules, and circuits described in connection with open options for implementation may be implemented or performed using a generic processor, digital signal processor (DSP), a specialized integrated circuit (ASIC), programmable gate array (FPGA) or other programmable logic device, discrete logic or transistor logic, discrete hardware components, or any combination designed to perform the functions described herein. Universal processor may be a microprocessor, but in an alternative embodiment, the processor may be a conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example as a combination of a DSP and a microprocessor, a variety of microprocessors, one or more microprocessor in conjunction with a DSP core, or any other such configuration.

This is torture method or algorithm, described in connection with open options for implementation, can be implemented directly in the hardware, the software, executable by the processor, or a combination of both of these funds. A software module may reside in random access memory device (RAM), flash memory, permanent memory (ROM), electronically programmable ROM (EPROM), electronically-erasable programmable ROM (EEPROM), registers, hard disk, removable disk, ROM, CD-ROM (CD-ROM) or any other storage media known in the art. See, for example, the recording medium associated with the processor so that the processor can read information from the recording medium and to record information on the recording medium. Alternatively, the recording medium may be embedded in the processor. The processor and the storage medium may reside on the ASIC. ASIC may be located in the user terminal. In an alternative embodiment, the processor and the storage medium may be discrete components in a user terminal.

In one or more exemplary embodiments, the functions described may be implemented in hardware, software, programmable hardware, or any combination specified. When implemented in software to provide the research Institute, functions can be stored or transmitted as one or more instructions or code on a computer readable medium. Machine-readable media includes both computer storage media and communications media including any medium that facilitates transfer of a computer program from one place to another. The storage media can be any available media that can access a universal computer or a dedicated computer. As an example, but not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electronically-erasable programmable ROM (EEPROM), a ROM on the CD-ROM (CD-ROM), or other storage on optical disk, magnetic disk, or other magnetic storage devices, or any other media that can be used to carry or store desired program code means in the form of instructions or data structures and which can access a specialized or General-purpose computer or a specialized or General-purpose processor. In addition, any connection is properly defined as a machine-readable medium (media). For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber-opt the existing cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium). The term "disk"as is used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disk (DVD), floppy disk and blu-ray drive and some disks (disks usually reproduce data magnetically, while other disks (discs) reproduce data optically with lasers. A combination of the above should also be included within the scope of computer-readable media.

The previous description of the disclosed embodiments is intended to provide an opportunity for professionals in the art to implement or use the present invention. Various modifications of these embodiments of the invention will be obvious to a person skilled in the art, and total disclosed principles can be applied to other variants of implementation without deviating from the essence or scope of the invention. Thus, the present invention is not intended to limit the disclosed variants of implementation, and should fit the ' wide scope, compatible with open principles and new features.

1. The device for synchronization signals when performing wireless communication, comprising:
at least one processor is configured to receive the sequence of the primary synchronization code (PSC)based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude, and shape the signal PSC based on the PSC sequence; and
a storage device that is connected to at least one processor.

2. The device according to claim 1, in which the at least one processor is configured to receive a repeating sequence of constant amplitude of length N2by repeating N times the sequence is a constant amplitude of length N, where N is an integer value, and generate the PSC sequence of length N2based on the Frank sequence of length N2and repeating sequence of constant amplitude of length N2.

3. The device according to claim 1, in which a sequence of constant amplitude based on at least one Golay sequence, M-sequence and a pseudorandom (PN) sequence.

4. The device according to claim 1, in which at least one is rocessor executed with the option to generate a signal PSC by interpolating sequence PSC and attaching a cyclic prefix.

5. The device according to claim 1, in which the at least one processor is configured to display the elements of the PSC sequence to a set of subcarriers to display zero values for subcarriers without the displayed elements to convert the displayed elements and zero values to obtain a sequence of samples in the time domain, and to generate a signal PSC attaching a cyclic prefix to the sequence of samples in the time domain.

6. The method of synchronization signals when performing wireless communication, comprising stages, which are:
get the sequence of the primary synchronization code (PSC)based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude, and
form the signal PSC based on the PSC sequence.

7. The method according to claim 6, in which the step of obtaining the sequence of the PSC includes the steps are:
get a repeating sequence of constant amplitude of length N2by repeating N times the sequence of constant amplitude, where N is an integer value, and
form the PSC sequence of length N2based on the Frank sequence of length N2and repeating sequence of constant amplitude length is s N 2.

8. The method according to claim 6, in which the phase of the signal PSC contains the stages on which:
form a sequence of samples of the time domain based on the PSC sequence and
appending a cyclic prefix to the sequence of samples in the time domain for signal PSC.

9. The device for synchronization signals when performing wireless communication, comprising:
means for receiving a sequence of the primary synchronization code (PSC)based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude, and
means for processing the signals of the PSC based on the PSC sequence.

10. The device according to claim 9, in which the means for obtaining the sequence of the PSC contains:
means for receiving a repeating sequence of constant amplitude of length N2by repeating N times the sequence is a constant amplitude of length N, where N is an integer value, and
the means for forming the PSC sequence of length N2based on the Frank sequence of length N2and repeating sequence of constant amplitude of length N2.

11. The device according to claim 9, in which the means for forming a signal PSC contains:
the tool is La formation sequence of time domain samples based on the PSC sequence and
means for appending a cyclic prefix to the sequence of samples in the time domain for signal PSC.

12. Machine-readable media containing instructions that when executed by a computer cause the computer to perform operations, including:
obtaining the sequence of the primary synchronization code (PSC)based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude, and signal processing PSC based on the PSC sequence.

13. A machine-readable medium of clause 12, further containing instructions that when executed by a computer cause the computer to perform operations, including:
getting a repeating sequence of constant amplitude of length N2by repeating N times the sequence is a constant amplitude of length N, where N is an integer value, and
the formation of the PSC sequence of length N2based on the Frank sequence of length N2and repeating sequence of constant amplitude of length N2.

14. A machine-readable medium of clause 12, further containing instructions that when executed by a computer causes the computer to perform operations, including:
form is of the sequence of samples in the time domain based on the PSC sequence and
attaching a cyclic prefix to the sequence of samples in the time domain for signal PSC.

15. The device for synchronization signals when performing wireless communication, comprising:
at least one processor is configured to receive the sequence of the primary synchronization code (PSC)based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of a sequence of constant amplitude, and to correlate the received signal with the PSC sequence for detection of cells; and
a storage device that is connected to at least one processor.

16. The device according to item 15, in which the at least one processor is configured to receive a repeating sequence of constant amplitude of length N2by repeating N times the sequence is a constant amplitude of length N, where N is an integer value, to generate the PSC sequence of length N based on the Frank sequence of length N2and repeating sequence of constant amplitude of length N2and to perform a partial correlation of a received signal with many segments of the PSC sequence, each segment comprises at least one repetition of posledovatelno and constant amplitude.

17. The device according to clause 16, in which the at least one processor configured to implement a non-coherent accumulation results of partial correlation for many segments of the PSC sequence to get the full correlation, and discover the PSC sequence in a received signal on the basis of the full correlation.

18. The device according to item 15, in which the at least one processor is configured to receive the first result of the partial correlation for the first part of the PSC sequence to obtain a second result of the partial correlation for the second part of the PSC sequence and to estimate the frequency shift based on the first and second results of partial correlation.

19. The device according to item 15, in which the at least one processor is configured to obtain an estimate of the channel based on the received signal and the sequence of the PSC and to detect the sequence of secondary synchronization code (SSC) in a received signal based on the channel estimation.

20. The method of synchronization signals when performing wireless communication, comprising stages, which are:
get the sequence of the primary synchronization code (PSC)based on the Frank sequence and a repeated sequence of constant amplitude, obtained by multiple repetition of p is coherence constant amplitude; and
correlate the received signal with the PSC sequence for detection of cells.

21. The method according to claim 20, further comprising stages, which are:
assess the frequency shift based on the first and second results of the partial correlations for the first and second parts of the PSC sequence.

22. The method according to claim 20, further comprising stages, which are:
get an estimate of the channel based on the received signal and the sequence of the PSC; and
find a sequence of secondary synchronization code (SSC) in a received signal based on the channel estimation.

23. The device for synchronization signals when performing wireless communication, comprising:
at least one processor is configured to receive the sequence of the primary synchronization code (PSC) from multiple PSC sequences generated based on at least one pair of complementary sequences, and to generate a signal PSC based on the PSC sequence; and
a storage device that is connected to at least one processor.

24. The device according to item 23, in which at least one pair of complementary sequence contains complementary sequences a and b, and the set of all sequences PSC contains the first PSC sequence a+b, formed by the concatenation of complemen the ary sequence And a complementary sequence, and the second PSC sequence B+A, formed by the concatenation of complementary sequences with complementary sequence A.

25. The device according to item 23, in which at least one pair of complementary sequence contains complementary sequences a and b, and the set of all sequences PSC contains the first sequence PSC formed with complementary sequences a and the second PSC sequence generated by using complementary sequences Century

26. The device according to item 23, in which at least one pair of complementary sequences contains Golay complementary sequences.

27. The device according to item 23, in which the at least one processor is configured to generate a sequence of samples of the time domain based on the PSC sequence and to generate a signal PSC attaching a cyclic prefix to the sequence of samples in the time domain.

28. The method of synchronization signals when performing wireless communication, comprising stages, which are:
get the sequence of the primary synchronization code (PSC) from multiple PSC sequences generated based on at least one pair of complementary sequences; and
form the signal PSC n is a sequence of PSC.

29. The method according to p, in which at least one pair of complementary sequence contains complementary sequences a and b, and the set of all sequences PSC contains the first PSC sequence a+b, formed by concatenating the complementary sequence And a complementary sequence, and a second PSC sequence B+A, formed by the concatenation of complementary sequences with complementary sequence A.

30. The method according to p, in which the phase of the signal PSC contains the stages on which:
form a sequence of samples of the time domain based on the PSC sequence and
form the signal PSC attaching a cyclic prefix to the sequence of samples in the time domain.

31. The device for synchronization signals when performing wireless communication, comprising:
at least one processor is configured to receive the sequence of the primary synchronization code (PSC) from multiple PSC sequences generated based on at least one pair of complementary sequences, and to correlate the received signal with the PSC sequence for detection of cells; and
a storage device that is connected to at least one processor.

32. The device p is p, in which at least one pair of complementary sequence contains complementary sequences a and b, and at least one processor configured to obtain a first correlation result for the correlation of the first part of a received signal with a complementary sequence And obtain a second correlation result for the correlation of the second part of the received signal with a complementary sequence In and discover the PSC sequence in a received signal based on the first and second correlation results.

33. The device according to p, in which at least one pair of complementary sequence contains complementary sequences a and b, and the set of all sequences PSC contains the first PSC sequence A+b and a second PSC sequence In+And, moreover, at least one processor is configured to receive the first and second correlation results for correlations of the first part of a received signal with complementary sequences a and b, to receive the third and fourth correlation results for correlations of the second part of the received signal with complementary sequences a and b, and to detect the first and second PSC sequence in a received signal the basis of the first, second, third and fourth results to the relatii.

34. The device according to p, in which the at least one processor is configured to obtain an estimate of the frequency shift on the basis of the first and second correlation results.

35. The device according to p, in which the at least one processor is configured to obtain an estimate of the channel based on the received signal and the sequence of the PSC and to detect the sequence of secondary synchronization code (SSC) in a received signal based on the channel estimation.

36. The method of synchronization signals when performing wireless communication, comprising stages, which are:
get the sequence of the primary synchronization code (PSC) from multiple PSC sequences generated based on at least one pair of complementary sequences; and
correlate the received signal with the PSC sequence for detection of cells.

37. The method according to p, in which at least one pair of complementary sequence contains complementary sequences a and b, and the set of all sequences PSC include the first PSC sequence A+b and a second PSC sequence In a+A, and the phase correlation of the received signal with the PSC sequence includes the steps are:
receive the first and second correlation results for correlations of the first part of a received signal with included entername sequences a and b
receive the third and fourth correlation results for correlations of the second part of the received signal with complementary sequences a and b, and
find the first and the second PSC sequence in a received signal based on the first, second, third and fourth correlation results.

38. The method according to p, optionally containing phases in which:
get an estimate of the channel based on the received signal and the sequence of the PSC; and
find a sequence of secondary synchronization code (SSC) in a received signal based on the channel estimation.



 

Same patents:

FIELD: information technology.

SUBSTANCE: invention discloses a system and a method of transmitting data using communication equipment for information through call subdivision and monitoring using a mobile switching centre in a mobile communication network. The mobile switching centre checks registration of the called party in provider system (CPDS). If the called party is registered in the (CPDS), connection of the voice call is completed and is then switched to information call mode. An initial menu of the called party stored in the CPDS is sent to the terminal of the calling party. After the called party selects content from the initial menu, the menu is transmitted to the terminal of the calling party. In accordance with the request of the calling party, the information call is disconnected and the voice call is established.

EFFECT: providing a calling party with content in accordance with the request of the calling party.

9 cl, 11 dwg

FIELD: information technology.

SUBSTANCE: invention discloses a method and a device for providing fast and flexible connection. A plurality of pre-configured channels is set up in a communication channel. A pre-configured channel is pre-allocated for a first method of coordinating the communication session. From the remaining channels, a pre-configured channel is pre-allocated for a second method of coordinating the communication session. The rate of the first coordination method is different from the rate of the second coordination method. The pre-configured channel, remaining after allocating channels for the first and second coordination methods is allocated for a fixed working mode of the transmission medium, through which the first communication session coordination method is used for flexible set up of the communication session.

EFFECT: shorter connection time.

27 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a method of merging cellular and paging communication systems. A cellular communication user terminal includes a reception device for receiving messages at paging communication frequency and a device for displaying text paging message on the screen of the user terminal. When the called user terminal moves out the coverage area of cellular stations, it is switched to receiving paging messages. The calling user terminal sends a short message to the paging network so that the called user terminal receives the message, and after receiving the message, the called user terminal is switched to a mode for operating in a mobile network when it enters the coverage area of the mobile network.

EFFECT: widening zone for transmitting short messages from the mobile cellular communication user terminal to the size of the coverage area of paging communication.

10 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a method of merging cellular and paging communication systems. A cellular communication user terminal includes a reception device for receiving messages at paging communication frequency and a device for displaying text paging message on the screen of the user terminal. When the called user terminal moves out the coverage area of cellular stations, it is switched to receiving paging messages. The calling user terminal sends a short message to the paging network so that the called user terminal receives the message, and after receiving the message, the called user terminal is switched to a mode for operating in a mobile network when it enters the coverage area of the mobile network.

EFFECT: widening zone for transmitting short messages from the mobile cellular communication user terminal to the size of the coverage area of paging communication.

10 dwg

FIELD: information technology.

SUBSTANCE: first network is monitored in accordance with a first radio interface and a message is received from the second network through the fist radio interface, where the second network is associatively related to the second radio interface which is different from the first radio interface. The invention also employs different recording methods and associated methods for preserving the possibility of connection with both networks when the wireless communication device moves through different geographical coverage areas.

EFFECT: supporting a wireless communication device with several radio interface standards.

39 cl, 15 dwg

FIELD: information technology.

SUBSTANCE: invention provides a system and a method of providing information content (130) for a surface mobile ratio station using a cellular data transmission network (26). The method involves transmission of information content (130) of a surface mobile radio station through at least a network (24) of surface mobile radio stations or a cellular data transmission network (26). The method also involves encapsulation of the information content (130) of the surface mobile radio station using a packet switching protocol when transmitting information content of the surface mobile radio station through the cellular data transmission network (26).

EFFECT: improved procedure for connecting communication systems.

17 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: invention discloses a packet communication method in which a random access request is sent over a random access channel from a mobile station to a base station; at the base station, in response to reception of the random access request, communication resources for transmitting a packet access request in order to send a packet access request from the mobile station in order to request the beginning of packet transmission, are allocated from communication resources meant for common uplink channels; a response is sent from the base station to the mobile station over one of the following channels: common data uplink channel and common control uplink channel which corresponds to the random access channel, in order to report reception of a random access request and inform on the communication resource for transmitting the packet access request, the packet access request is sent from the mobile station using the same communication resource for transmitting the packet access request which was reported in the response.

EFFECT: shorter time before beginning packet transmission.

10 cl, 11 dwg

FIELD: information technology.

SUBSTANCE: invention discloses a peer-to-peer mobile information-communication network, a communication channel and a device which is an element of the said network. The network elements have a self-identification function. The network element identifier contains information on position of that element in coordinates on the location and time for determining these coordinates. Switching in the communication channel takes place in the direction from the position of one network element to another, based on the network identification information.

EFFECT: prevention of identification conflicts in the network.

15 cl, 1 dwg, 3 ex

FIELD: information technology.

SUBSTANCE: invention discloses a peer-to-peer mobile information-communication network, a communication channel and a device which is an element of the said network. The network elements have a self-identification function. The network element identifier contains information on position of that element in coordinates on the location and time for determining these coordinates. Switching in the communication channel takes place in the direction from the position of one network element to another, based on the network identification information.

EFFECT: prevention of identification conflicts in the network.

15 cl, 1 dwg, 3 ex

FIELD: information technology.

SUBSTANCE: invention discloses a peer-to-peer mobile information-communication network, a communication channel and a device which is an element of the said network. The network elements have a self-identification function. The network element identifier contains information on position of that element in coordinates on the location and time for determining these coordinates. Switching in the communication channel takes place in the direction from the position of one network element to another, based on the network identification information.

EFFECT: prevention of identification conflicts in the network.

15 cl, 1 dwg, 3 ex

FIELD: information technology.

SUBSTANCE: based on the method used in a wireless communication system (WiMAX), where in order to identify a transmitter with a receiver, the most probable successful radiated power (C) is calculated in order to provide faster identification of the transmitter by the receiver, a method is disclosed which, based on the calculated radiated power, the allowable maximum (D) and allowable minimum (E) radiated power is given. In that case, at the initial moment, radiated power (G) is controlled, which is less than the calculated radiated power (C) and higher than the given allowable minimum radiated power (E). The radiated power is then increased in form of steps (F) gradually until attaining given allowable maximum radiated power (D). Upon attaining the given allowable maximum radiated power (D), the radiated power is gradually increased in form of steps (F) from the given allowable minimum radiated power (E) to the given allowable maximum radiated power and further until the transmitter is identified or when no additional operations are performed.

EFFECT: high accuracy of identifying a transmitter.

10 cl, 1 dwg

FIELD: information technology.

SUBSTANCE: device has a transmission control unit, a reception control unit, a communication channel. The transmission control unit has a binary code generator on the transmitting point, a comparator circuit, an output register, a memory device, a transmission end decoder, an address counter, five OR elements, a binary pulse generator, a first clock pulse generator, two AND elements, two flip flops. The reception control unit has a binary code generator on the receiving point, an OR element, an address counter, a memory device for the receiving point, a reception end decoder, a former, an integrating circuit, a flip flop, an AND element and a clock pulse generator.

EFFECT: reduced load on the communication channel.

2 cl, 2 dwg

FIELD: information technology.

SUBSTANCE: in a mobile communication system, having a single control channel and several common channels and having a network which periodically sends control information over the control channel, the following takes place: periodic reception of the control channel; detection of a common channel identifier in the received control channel at a defined time; and reception of data over a separate common channel which is specified by control information which includes that detected identifier.

EFFECT: minimisation of data length generated during transmission and reception of data, and minimisation of consumption of the energy of the accumulator of the mobile terminal.

18 cl, 7 dwg

FIELD: information technology.

SUBSTANCE: in a mobile communication system, having a single control channel and several common channels and having a network which periodically sends control information over the control channel, the following takes place: periodic reception of the control channel; detection of a common channel identifier in the received control channel at a defined time; and reception of data over a separate common channel which is specified by control information which includes that detected identifier.

EFFECT: minimisation of data length generated during transmission and reception of data, and minimisation of consumption of the energy of the accumulator of the mobile terminal.

18 cl, 7 dwg

FIELD: electricity.

SUBSTANCE: variable inductance coil has inductance value that can be switched between two or more values. It includes multiple-loop primary inductance coil which is electromagnetically connected to pair of secondary inductance coils. The latter are connected to each other to form closed loop within the limits of which they have variable topology switched between series and parallel connections to change inductance value, which is provided with multiple-loop primary inductance coil.

EFFECT: enlarging control range.

21 cl, 15 dwg

FIELD: information technology.

SUBSTANCE: method involves the following steps: receiving a communication efficiency parametre; if the communication efficiency parametre is equal to a predetermined value or exceeds the predetermined value, the first transmitter-receiver pair and the second transmitter-receiver pair use a predefined communication standard during communication, where determination of the predefined communication standard is carried out on the first transmitter-receiver pair and the second transmitter-receiver pair, respectively. A predefined bit table and a gain table are provided on the first transmitter-receiver pair and the second transmitter-receiver pair, respectively. According to the described method, in case of high broad-band noise, fast switching to the predefined bit table and gain table can be provided using a simple message or "request-response" mechanism. Use of this method avoids the need to exchange bit tables and gain tables.

EFFECT: avoiding wastage of channel capacity.

17 cl, 7 dwg

FIELD: information technology.

SUBSTANCE: method involves the following steps: receiving a communication efficiency parametre; if the communication efficiency parametre is equal to a predetermined value or exceeds the predetermined value, the first transmitter-receiver pair and the second transmitter-receiver pair use a predefined communication standard during communication, where determination of the predefined communication standard is carried out on the first transmitter-receiver pair and the second transmitter-receiver pair, respectively. A predefined bit table and a gain table are provided on the first transmitter-receiver pair and the second transmitter-receiver pair, respectively. According to the described method, in case of high broad-band noise, fast switching to the predefined bit table and gain table can be provided using a simple message or "request-response" mechanism. Use of this method avoids the need to exchange bit tables and gain tables.

EFFECT: avoiding wastage of channel capacity.

17 cl, 7 dwg

FIELD: information technology.

SUBSTANCE: system provides for a combination use of open loop and closed loop PSD control algorithms. The open loop control is a function of path loss from the serving cell as well as the neighbouring cells. The closed loop control updates the end node transmit PSD by listening to the load indicators from the serving cell and at least one other neighbouring non-serving cell which generates the highest level of interference.

EFFECT: faster control using with multi-cell information and low inter-cell interference.

34 cl, 34 dwg, 5 tbl

FIELD: physics.

SUBSTANCE: power limiting value indicators can be analysed when scheduling mobile devices. Mobile devices with power limitations can be scheduled for internal subbands. Other mobile devices can use the remaining part of the allocated spectrum. Additionally, mobile devices can estimate and establish the power loss coefficient of the power amplifier based on subband scheduling.

EFFECT: noise attenuation and improved performance of mobile devices.

39 cl, 13 dwg

FIELD: information technology.

SUBSTANCE: low power transmission mode is provided in a mobile terminal. The method involves steps of transmitting an access request to a base station; receiving, in response to the access request, from the base station a request to transmit using a low power transmission mode; communicating with the base station using a reduced transmit power level. The request from the base station comprises a request to disable a base station search function. Invention can be applied in power sensitive environments, e.g. inside an airplane or a hospital.

EFFECT: possibility of using mobile telephones in power sensitive environments.

19 cl, 6 dwg

FIELD: radio engineering; construction of radio communication, radio navigation, and control systems using broadband signals.

SUBSTANCE: proposed device depends for its operation on comparison of read-out signal with two thresholds, probability of exceeding these thresholds being enhanced during search interval with the result that search is continued. This broadband signal search device has linear part 1, matched filter 2, clock generator 19, channel selection control unit 13, inverter 12, fourth adder 15, two detectors 8, 17, two threshold comparison units 9, 18, NOT gates 16, as well as AND gate 14. Matched filter has pre-filter 3, delay line 4, n attenuators, n phase shifters, and three adders 7, 10, 11.

EFFECT: enhanced noise immunity under structural noise impact.

1 cl, 3 dwg

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