Transmitter and receiver in cellular communications system

FIELD: information technology.

SUBSTANCE: in cellular communications system with multiple carriers, the second code of synchronisation (Walsh code or serial GCL code), mapped on the second synchronising channel is used as the signal for determination in which cell of base station the mobile station terminal device itself is located. Signal transmitted from base station to mobile station terminal device is mapped into radiocommunication frame which is two-dimensional in directions of time and frequency. The synchronising channel into which the first and the second synchronising channels are mapped is imbedded in multiple areas in radiocommunication frame. When certain series number of the second code for cell or cells group determination is mapped into radiocommunication frame, to the second synchronisation code phase slue or cyclic shift is applied where one radiocommunication frame comprises one cycle. On the receiving side, frame header timing data is determined through obtaining information relative to phase slue angle or amount of the second synchronisation code cyclic shift.

EFFECT: high synchronisation accuracy.

14 cl, 13 dwg

 

The LEVEL of TECHNOLOGY

The technical field to which the invention relates.

Described herein embodiments of refer to transmitter and receiver devices in the cellular system.

The level of technology

In the cellular system, the terminal device of the mobile station typically performs the search of the cell for connection with the line radio. Search cell is performed with the use of the sync channel (SCH)contained in the frame of the radio downlink. Sometimes in addition to the sync channel uses a fixed channel transmission of the pilot signal at a particular cell or a broadcast channel (BCH) (see non-patent document 1).

With reference figa, 1B and 2 explained the first known technology described in non-patent document 2.

According to the aforementioned prior art in the radio frame transmit multiple symbols SCH. For each character SCH generalized chirp-like sequence code (serial code GCL) is multiplexed in the direction of frequency.

Figa and figv illustrate the multiplexing SCH.

On figa on the vertical and horizontal axes set the direction of frequency and time, respectively, and presents the radio resource. Additionally, figa illustrates how SCH is transmitted using the radio resource. SCH placed in the backside of the Noi position in the direction of time. S0, S1, S2, S3... and SN-1indicate each character serial code GCL. Each character serial code GCL is transmitted in accordance with bronirovanie transfer SCH using one subcarrier. When the number of subcarriers is N, serial GCL code becomes a code of length N, composed of symbols from S0SN-1.

Serial number serial code GCL, multiplexed on each character SCH, change the direction of time. The modification pattern is a pattern having a good characteristic cross-correlation and autocorrelation (called hopping pattern code in non-patent document 2), and it indicates an identifier for identifying a cell or group of cells) and bronirovanie frame radio. In particular, if the pattern changes in time series numbers of the SCH symbol transmitted from a cell identifier g to identify the cell or group of cells is the following (Nsyncthe number of SCH symbols in a radio frame),

[Mathematical expression 1]

the serial code GCL, multiplexed on the i-th symbol of the SCH in the radio frame, can be expressed as follows.

[Mathematical expression 2]

... (1)

In the expression above, NGand are the length of the sequence GCL series code and symbol, respectively. In the case k=0 it indicates the first (0th) character of this serial code GCL. Similarly, k=1,..., and k=n specify the first character, ... and n-th symbol, respectively.

Figv illustrates the case where four SCH multiplexer time in one radio frame, the frequency and time specified on the vertical and horizontal axes. On FIGU serial code GCL ID g multiplexer as SCH. h(g)iis hopping pattern code (serial number), are used to generate sequential code GCL ID g. On FIGU multiplexer time four serial code GCL, which have the same identifier defined by a single cell or group of cells, and number series spasmodic template code is different.

Figure 2 illustrates a sample hopping pattern code.

ID g specifies which ordered row of this table is uneven pattern code. For example, when the identifier g is 0, the hopping pattern code lists {4, 5, 6, 7, and 8}. In this case, the length of the sequence hopping pattern code is 5. Therefore, in the exemplary embodiment described above, as each number series, h(0)0=4, h(0)1=5, h(0)2=6, h(0) 3=7 and h(0)4=8. Therefore, abrupt code template, illustrated in figure 2, can be used for multiplexing time-SCH five in one radio frame.

On the receiving side to the character SCH apply FFT on the basis of the detection bronirovania character and podagra pre-discovery process ID of a cell or group of cells)to convert the SCH symbols in the frequency domain. Of the signal in the frequency domain to extract the component of the subcarrier in which the multiplexed serial code GCL, and its differential demodulated serial code apply IDFT. Differential demodulation means calculating S(n)×S* (n+1)=exp{j2 π h(g)i(n+1)/NG} assuming that S(n) is the symbol of the n-th code. Accordingly, the value obtained by the differential demodulation, is the value obtained when turning 2 π h(g)i/NGinteger number of times. Therefore, if there is information about how many times made the turn, you can get the information about the h(g)iassuming that NGit is already known. In fact, it applies to all SCH symbols in a radio frame, and the output of IDFT stored in memory. Then to determine the hopping pattern code in the application is it soft decision metric is calculated for all templates cyclic shift hopping pattern code - candidate, and the spasmodic code template of cyclic shift that gets the maximum value is determined as the detected values of ID and bronirovania frame of radio cells (or cell). The metric calculation means adding the output values of the IDFT S(n)×S* (n+1)obtained by differential demodulation of all spasmodic code templates and all cyclical patterns, and determining that the greatest added value is the hopping pattern code that must be obtained. For example, in the exemplary embodiment presented above, the output values of the IDFT, the received frame communication with the 0-th to fourth, are stored as a function of n. Then, as the IDFT output value derived from the 0-th SCH is the value obtained when n=4. Similarly, as the output values of the IDFT of the first, second, third and fourth SCH are values obtained when n=5, n=6, n=7 and n=8 respectively, and the values are added and stored. Then hopping pattern code specified for n, rotated and, similarly, are obtained and stored new added values. Then the same calculation is also applied to intermittent code templates other identifiers, and their added values are stored. Then eventually get added meant is I jump code templates all identifiers, search values, the maximum of them, and get the ID and value of cyclic shift hopping pattern code, which provide a specified maximum value.

Another known technology described in non-patent document 3. The second known technology described in non-patent document 3, is explained with reference to figa and figv.

In this known technology in the radio frame transmit multiple symbols SCH. Orthogonal code to specify the ID of the group of cells and bronirovania radio frame (e.g., Walsh code) is multiplexed in the direction of frequency. In contrast to the known technology described earlier, the pattern of change of the number of series in the direction of time does not specify a group ID and cell bronirovanie frame radio, but the group ID and cell bronirovanie frame radio (and other information) directly indicates the series number.

The described method of multiplexing multiple orthogonal codes in the direction of the frequency to increase the number of codes secondary SCH (second channel synchronization). Figa illustrates that the Walsh code is multiplexed in the direction of the frequency SCH. In this case, each symbol of Wi(i=0 to N-1) is assigned to each subcarrier, and a code length equal to N. In accordance with the characteristics of the Walsh code exists t is like N types of Walsh codes of length N, therefore, as illustrated figv, ID multiplexes Walsh codes, g and f, of length M in the direction of frequency. In this case, it is assumed that 2M=n Then the number of codes that can be used for SCH, the number of subcarriers is equal to N, becomes MHM, as combined Walsh code of length M and Walsh code of length M. for Example, if M=4 and N=8, in the case figa, the number of Walsh codes used is 8 (N=8), while in the case of 3B, it becomes equal to 16 (M×M=16) and it increases.

On the receiving side performs FFT of SCH symbols on the result of detection bronirovania of podkatov and symbols that are performed before the detection process group ID of the cell, a process executes correlation channels SCH in the frequency domain and found group ID and cell bronirovanie cropping radio.

In the patent document 1 discloses the technology for the phase shift of the transmission of the downward transmission frame for each TCH and to transfer it to improve the accuracy of channel estimation.

Non-patent document 1: 3GPP TR25.814 V7.0.0

Non-patent document 2: 3GPP TSG - RAN WG1, R1-061117, "Comparison of One-SCH and Two-SCH schemes for EUTRA Cell Search ", ETRI

Non-patent document 3: 3GPP TSC - RAN WG1, R1-060780, "SCH Structure and Cell Search Method for E-UTRA Downlink", NTT DoCoMo, NEC

Patent document 1: patent publication Japan number H10-126331

In vysheupomyanutyh technologies as the series number serial code, multiplexity for each SCH in the frame of the radio is different, it is necessary to perform IDFT, etc. and the correlation process using the codes of all the series numbers for each accepted SCH during SCH detection on the receiving side and accordingly increases the amount of processing.

The invention

The present invention is to provide a transmitting and receiving device of a cellular communication system which has a capability of reducing the amount of processing when the process of discovery channel synchronization.

The transmitting device according to the present invention places the signal in the radio frame, where multiple channels are multiplexed synchronization in the time direction, and transmits the signal, and includes a transmission unit to display the code, the size of which corresponds to its position in the radio frame in which the multiplexed channel synchronization, which displays the code and applies modulation using one radio frame as one cycle per channel synchronization and transmission of the code.

The receiving device according to the present invention receives the signal, is placed in the radio frame in which the displayed code, the size of which corresponds to its position in the radio frame in which a mul is plexitube the synchronization channel to display the code and applied modulation using one radio frame as one cycle. The receiving device includes a block specifications code to determine the code that is displayed on the sync channel, and the power receiving bronirovania frame radio to get bronirovania the head of the radio frame relative to the position in the radio frame in which the multiplexed synchronization channel.

According to the present invention during discovery channel synchronization, since there is no need to perform the correlation process IDs of all series numbers may be reduced the amount of processing.

Objective and advantages of the invention should be realized and attained by the elements and combinations particularly specified in the claims.

It should be clear that both the foregoing General description and the following detailed description are illustrative and explanatory and do not limit the scope of the claimed invention.

BRIEF DESCRIPTION of DRAWINGS

Figa illustrates the multiplexing of channels SCH (No. 1).

Figv illustrates the multiplexing of channels SCH (No. 2).

Figure 2 illustrates a sample hopping pattern code.

Figa explains the second exemplary variant known technology (No. 1).

Figv explains the second option is known technologies (No. 2).

Figure 4 explains the first preferred implementation this is the future of invention (No. 1).

Figure 5 explains the first preferred implementation of the present invention (No. 2).

6 explains the first preferred implementation of the present invention (No. 3).

7 explains the second preferred implementation of the present invention (No. 1).

Fig explains the second preferred implementation of the present invention (No. 2).

Figure 9 explains the third preferred implementation of the present invention (No. 1).

Figure 9 explains the third preferred implementation of the present invention (No. 1).

Figure 10 explains the third preferred implementation of the present invention (No. 2).

11 explains a third preferred implementation of the present invention (No. 3).

Description of embodiments

In a preferred embodiment of the present invention, first, as a first solution, although the number Walsh code, which must be multiplexed on each character SCH in the radio frame, identical, the phase of each Walsh code is turned by a certain amount corresponding to its position in the radio frame. The rotation phase is completed in a cycle of one frame of the radio.

Alternatively, in the form of the second solution, although the number of consecutive code GCL, which the debtor is to be multiplexed on each character SCH in the radio frame, identical serial code GCL cyclically shift by a certain amount corresponding to its position in the radio frame. The cyclic shift is completed in a cycle of one frame of the radio.

Below will be explained preferred embodiments of the present invention. The next preferred option implementation expresses the sync bronirovania using the first channel synchronization and identification of the group of cells using the second channel synchronization and based on the three-step search cells using transmission channel pilot signal. However, the present invention is not limited to this. For example, the present invention is applicable even in the case of another exemplary variant of the method of synchronization of bronirovania (method correlation guard interval in the case of OFDM), or when the second sync channel specifies the identifier of the cell.

Below will be explained the first preferred implementation of the present invention with reference to Fig.4-6.

The first preferred implementation is the most basic preferred embodiment of the first solution. 4 is an exemplary device configuration of the base station. The data signals of the data transmission channel, the first sync channel, the second channel synchronization, for which implementation is twin rotation phase unit 10 handle rotation phase, multiplexer in block 11 of multiplexing channels and convert from serial to parallel in the processing block 12 serial-to-parallel conversion. After the data signal is converted into a parallel signal, it applies the inverse Fourier transform block IFFT processing to the signal in the time domain. Then the data signal added guard interval in block 14 insert a guard interval, and the data signal is passed through the processing unit 15 of the radio and the antenna 16.

The pilot channel signal is a reference signal for the modulation data channel. The first channel synchronization is a common signal between cells to synchronize bronirovania. The second channel synchronization is a Walsh code that specifies the identifier of the group of cells (or cell ID). Code Walsh code is used for code extension in W-CDMA and the like, and is orthogonal code having such a characteristic that the correlation between the codes that belong to different IDs equal to 0. Base station belonging to the group ID of the cell g uses g-th Walsh code W. the Phase of the second channel synchronization rotate in accordance with its position in the radio frame by block 10, the processing of turning the channel. More specifically, rotation f the PS Walsh code of the second channel synchronization multiplexed on the i-th (i=0, 1, 2, ..., Nsync-1) (Nsync- number of channels SCH in the frame of the radio) character SCH, exp{j2 π i/Nsync}. Respectively, is carried out one cycle of the rotation phase, or one cycle of the rotation phase becomes the length of one radio frame. In particular, the length becomes the following.

[ Mathematical expression 3]

... (2)

The multiplexing block 11 channels multiplexes the appropriate channels. Unit 12 handling serial-to-parallel conversion displays the sequence of the signals entered from block 11 multiplexing of the channels of subcarriers. Unit 13 processing IFFT converts the signal in the frequency domain to the time domain signal and generates a valid symbol. Unit 14 insert guard interval copy the last part of a valid symbol, and attaches to it the head part of a valid symbol. After applying to the signal processing of radio communication, such as the conversion frequency, etc. in the processing unit 15 of the radio signal transmitted from the antenna 16.

5 is a rough version of the structure of the radio frame. In an exemplary embodiment 5 of the transmission channel pilot signal and the sync channel is placed in the head and tail symbols podagra respectively. The first and second synchronization channel in cereno multiplexed on the frequency. 5 is only an exemplary variant of the method of multiplexing channel, and this method does not restrict the scope of the present invention. In relation to the display of the second channel synchronization can be considered in many ways. For example, mapping can be performed when the absolute phase assuming coherent detection using the first sync channel as a reference signal. As a variant, the display can also be performed by means of differential coding. In any case this method does not limit the present invention.

6 is an exemplary block configuration of the search processing cell in the mobile station.

In block 20 of the processing of the first stage performs the correlation process in the time domain between the reference signal of the first channel synchronization with a known pattern, which is stored in block 21 of the memory for storing the reference signals of the first channel synchronization, and the received signal by processing block 22 correlation, the average time through block 23 averaging in time and discover bronirovanie obtain the maximum correlation values as detected bronirovania podagra and found bronirovania by FFT unit 24 is detected bronirovania frames.

In block 25 of the processing of the second cascade is fixed guard interval in accordance with bronirovanie FFT, detected in block 20 of the processing of the first cascade through block 26 correct guard interval, and the signal is converted into a signal in the frequency domain through FFT process unit 27 of the FFT processing. Then the block 28 extraction of the second channel synchronization retrieves the second channel synchronization. In this case, since bronirovanie radio frames is unknown, the phase of the extracted second channel synchronization is also unknown. However, as Walsh code set value of the rotation phase, the specified side of the transmission, then the known magnitude of the rotation phase at the SCH symbol. The processing unit 29 rotates the phase of each received symbol SCH applies the rotation phase, the reverse applied on the side of the transmission and the block 39 averaging time-averages the result over time. In this case, although the magnitude of the rotation phase is set for the SCH on the side of the transmission that is different depending on its position in the radio frame of the SCH symbol is known that the value of a single rotation phase is 2π/N in accordance with Expression 2. Therefore, to reverse the rotation phase is used, this single value. Is its correlation with the Walsh code is a candidate that is stored in the block 32 memory for storing codes of the candidates, and in block 33 of the detection bronirovania radio frames of the second channel synchronization detection is by bronirovanie radio frame and the second channel synchronization by determining the maximum correlation values and the magnitude of the rotation phase for him. In particular, since the amount of rotation phase for correlation values is equal to 2π (i-1)/Nsyncthen the sequence of SCH symbol in the frame of the radio you can find out when calculating the value i indicating the sequence of SCH symbol from the head part in the radio frame. As the position of the i-th symbol of the SCH in the radio frame is fixed, the position of the head of the radio frame is known.

In block 35, the processing of the third stage unit 36 extract the transmission channel pilot signal, extracts a pilot signal from a subcarrier to which a multiplexed transmission channel pilot signal. Through block 38 processing the correlation is determined by the correlation between the extracted pilot signal scrambling code candidate, which is stored in block 37, a memory for storing codes of the scrambling candidates, and averaged by block 39 averaging over time. Then, the detection unit 40 scrambling code detects as detected scrambling code scrambling code candidate having the maximum correlation value relative to its time-averaged value.

Below will be explained a second preferred implementation of the present invention according to Fig.7 and Fig.

7 and Fig to the components identical to the components 4 and 6, applied identical reference position.

In the second preferred implementation receive when applying the first solution to a method for increasing the number of codes of the second channel synchronization that explains the non-patent document 3.

7 is an exemplary configuration of a base station. Configuration identical to the configuration of the base station in the first preferred embodiment, except that the second sync channel contains two codes (codes 1 and 2 of the second synchronization). Processing of the rotation phase is applied independently to the codes 1 and 2 of the second synchronization. In particular, each of the codes 1 and 2 of the second synchronization multiplexing on the i-th (i=0, 1, 2, ..., Nsync-1) (Nsync- number of SCH in the frame of the radio) SCH symbol can be expressed as follows.

[ Mathematical expression 4]

In the expression above, d (-0, 1, ..., Nsync-1) is the shift of the rotation phase code 2 second synchronization, the relative rotation phase code 1 second synchronization. When combining this shift with numbers series code 1 and 2 of the second synchronization codes of the second channel synchronization becomes M×M×Nsyncand may be increased in Nsynctimes relative to the number of codes in non-patent document 3. However, M is the length of the codes 1 and 2 of the second synchronization. Accordingly, blocks 10-1 and 10-2 handle rotation phase perform the rotation phase codes 1 and 2 of the second timing, respectively, and the multiplexing block 11 channels mult is flexerul them.

Fig is an exemplary block configuration of the search processing cell in the mobile station.

The processing block 20 of the first cascade and the block 35 processing of the third stage is identical to identical blocks of the first preferred variant implementation. Unit 25a processing of the second cascade block contains 50 separate code after averaging over time through block 30 averaging over time, and the processing unit detection bronirovania radio frame of the second channel synchronization is different from the processing of the first preferred variant implementation. The block 50 of the code division separates the two code 1 and 2 of the second synchronization multiplexed in the second channel synchronization. The processing block 31 correlation performs a correlation operation between each adopted by the second synchronization code and a Walsh code candidate. The block 33 is detected bronirovania radio frames of the second channel synchronization determines the number of each code of the second synchronization based on the maximum correlation values, determines the magnitude of the rotation phase for the value of the correlation code 1 second synchronization detects bronirovanie radio frame, detects the phase difference between the maximum correlation values of codes 1 and 2 of the second synchronization, and detects the shift of the rotation phase on the side of the transmission.

Below will be explained a third of the preferred implementation of the present invention according to figures 9-11.

In figures 9 and 11 to the components identical to the components 4 and 6, applied identical reference position.

The third preferred variant implementation is the preferred option for the second solution.

Figure 9 - example of a device configuration of the base station. For the second code synchronization using serial GCL code that specifies the identifier of the group of cells (or cell ID). Code GCL was explained in the section of the prior art. Code for a second synchronization cyclically shift in accordance with its position in the radio frame by block 10A processing cyclic shift. More specifically, the second channel synchronization, multiplexity on the i-th (i=0, 1, 2, ..., Nsync-1) (Nsync- number of channels SCH in the frame of the radio) SCH symbol in the radio frame, cyclically shift on the ID. Is provided to a cyclic shift was completed in one cycle of one frame of the radio. In particular, establishes the following dependency.

[ Mathematical expression 5]

... (3)

In the expression above, LS-SCHis the length of the second synchronization code.

However, although, as illustrated in Expression 3, LS-SCHexpressed as a product of integers, it is necessary that the length of the serial code GCL was a Prime number. After vetelino, LS-SCHand length LGCLserial code GCL used to code the second synchronization is not equal to (LGCLis not a Prime number in accordance with Expression 3). Consequently, it can be considered a way to trim GCL series code having a sequence length in the minimum Prime number less than LS-SCHor a way to fill 0 GCL series code having the maximum Prime number less than LS-SCH, how to reuse parts of the code, or similar. Although characteristics such as characteristic autocorrelation etc. serial code GCL, is improved when the length of the sequence is a Prime number, as described above, it has the characteristic sufficient for it to display on SCH and its use even when adjusting the length of the sequence. Since the detection of serial code GCL based on the IDFT has nothing to do with the fact that the length of the sequence is a Prime number, can also be considered using a serial code GCL (although it might not be specifically named by the serial code GCL, as the length of the sequence is not a Prime number), having a length equal to LS-SCH.

Additionally, when attaching the initial shift δ (=0, , ..., d-1) to cyclic shift of the initial shift can be combined with the system number GCL used to code the second synchronization, and can be increased to the number of codes that can be used as a second synchronization codes.

Figure 10 is a sample structure of a radio frame.

In an exemplary embodiment, figure 10 channels synchronization and transmission of the pilot signal is located in the head and tail symbols podagra respectively. The first and second synchronization channels are alternately multiplexed in frequency. Figure 10 is only one exemplary variant of the method of multiplexing channels and does not limit the present invention. In relation to the display of the second channel synchronization can also be taken many ways. For example, the second channel synchronization can be displayed also when the absolute phase assuming coherent detection using the first sync channel as a reference signal. Alternatively, it can be shown by differential encoding. In any case, this method does not limit the present invention.

As shown in figure 10, although the 0-th symbol SCH second channel synchronization are not cyclically shifted serial codes GCL (S0,S 1, ..., SL-2and SL-1), in the i-th symbol SCH uses the same serial codes GCL, once received cyclic shift on the id (SL-id, SL-id+1, ..., SL-id-2and SL-id-1).

11 is an exemplary block configuration of the search processing cell in the mobile station.

The processing block 20 of the first cascade and the block 35 processing of the third stage is identical to identical blocks of the first preferred variant implementation. In block 25b processing of the second cascade unit 26 removing protective intervals eliminates the guard interval in accordance with bronirovanie FFT detected by the processing block 20 of the first cascade and block 27 processing FFT converts the signal into a signal in the frequency domain through its FFT processing. Retrieves the system GCL displayed on the second channel synchronization. In this case, since bronirovanie radio frame is not known, then the unknown initial position adopted system GCL (SCH of any order in the frame of the radio serial code displayed GCL). However, the known value of a single cyclic shift of the SCH symbol. Therefore, in block 29A of the cyclic shift processing on the receiving side for each received symbol SCH applies a cyclic shift, reverse single cyclic shift applied on the side of the transmission, and financial p the tat is averaged over time. Block 55 differential demodulation 55 performs differential demodulation accepted system GCL. The differential demodulation perform the process expressed by the following expression.

[ Mathematical expression 6]

In the expression above, R(n) indicates the nth symbol in the received system GCL. Block 56 processing applies IDFT IDFT processing to the output of the differential demodulation. The result of the IDFT processing becomes as follows.

[Mathematical expression 7]

Block 57 detection of peaks IDFT output determines the kmaxat which output power |φ(k)|2block 56 IDFT processing is maximum, as the detected number system GCL. The detection principle of this system number GCL identical clarified in known technology. Block 59 processing correlation of cyclic shift reads the reference signal s(n-d) system GCL for the detected number of GCL from the block 60 memory for storing the reference signal system GCL and determines the correlation of cyclic shift d=0~LGCL-1 with the adopted system of GCL.

[Mathematical expression 8]

The block 60 of the peak detection output correlation of cyclic shift detects and performs a circular shift of dmaxwhere |Ψ(d)|2becomes mA is maximum. Since dmaxindicates the amount of cyclic shift of the received serial code GCL, it indicates SCH of any order in the frame of the radio serial code displayed GCL. Since the time difference between the head part of the frame of the radio and the SCH symbol is known in advance, upon receiving the information about the dmaxyou can get information about bronirovania radio frames.

When known bronirovanii frames Radiocommunication known position of the head part of the frame of the radio. Therefore, it can be receiving data.

All exemplary embodiments and the conventional terminology presented here are intended to facilitate the understanding, to facilitate understanding of the invention and the concepts proposed by the author of the present invention for the development of the art and should be considered as not limiting the invention to such, in particular, presents exemplary embodiments and conditions, the order of such approximate variants in the description is not related to the indication of higher or lower priority such variants within the present invention. Despite the fact that above have been described in detail embodiments of the present invention, it should be understood that the invention can be made various changes, substitutions and modifications not in the walking beyond the nature and scope of the present invention.

1. The transmitting device to the host signal in the radio frame in which a multiplexed set of synchronization channel in the direction of time, and for signal transmission, and the said device contains
the transmission unit to display codes that are cyclically shifted by some value of cyclic shifts, using one radio frame as one cycle, at least one of the synchronization channel and to transmit codes.

2. The transmitting device according to claim 1, in which
each code is cyclically shifted by a specified amount of cyclic shift according to the position of each of the codes in the frame of the radio.

3. The transmitting device according to claim 1, in which
each of the codes represents another sequence generated by shifting the given code.

4. The transmitting device according to claim 1, in which
each of the codes is a combination of a code sequence which is different.

5. The transmitting device according to claim 1, in which
each of the codes represents another sequence formed by the same processing unit.

6. The transmitting device according to any one of claims 1 to 5, in which
each of the codes used to identify a cell or group of cells in the cellular system.

7. A receiving unit for receiving the signal placed the frame in the radio frame, where multiple channels are multiplexed synchronization in the time direction, and the said device comprises:
a reception unit for receiving codes that are cyclically shifted by some value of cyclic shifts, using one radio frame as one cycle, and displayed, at least one of the synchronization channel.

8. The receiving device according to claim 7, in which
each code is cyclically shifted by a specified amount of cyclic shift according to the position of each of the codes in the frame of the radio.

9. The receiving device according to claim 7, in which
each of the codes represents another sequence generated by shifting the given code.

10. The receiving device according to claim 7, in which
each of the codes is a combination of a code sequence which is different.

11. The receiving device according to claim 7, in which
each of the codes represents another sequence formed by the same processing unit.

12. The receiving device according to any one of claims 7 to 11, additionally comprising:
the unit receiving bronirovania radio frames to obtain bronirovania the head of the radio frame based on the received code.

13. The receiving device according to any one of claims 7 to 11, additionally comprising:
unit code definition for the definition of the Oia code using signal displayed on the received sync channel, and copy the code.

14. The receiving device according to any one of claims 7 to 11, in which each of the codes used to identify a cell or group of cells in the cellular system.



 

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2 cl, 7 dwg

FIELD: information technologies.

SUBSTANCE: method to assign a sequence and a device to assign a sequence are used in a system, where multiple different Zadoff-Chu sequences or GCL sequences are assigned to one cell, at the same time a number of arithmetic operations and extent of correlation circuit integration at a receiving end may be reduced. According to these method and device, at ST201 a counter (a) and a number (p) of current assignments of a sequence are initialised, and at ST202 it is identified whether the number (p) of current sequence assignments matches the number (K) of assignments to one cell. At ST203 it is identified whether the number (K) of assignments to one cell is odd or even. If K is even, at ST204-ST206, numbers of sequences (r=a and r=N-a), which are currently not assigned, are combined and then assigned. If K is odd, at ST207-ST212, for those sequences, to which a pair may not be selected, one of sequence numbers (r=a and r=N-a) is assigned, which are currently not assigned.

EFFECT: reduced volume of calculations.

8 cl, 17 dwg

FIELD: information technology.

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

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

44 cl, 14 dwg

FIELD: information technology.

SUBSTANCE: method of transmitting control signal involves steps for multiplexing a plurality of 1-bit control signals within a given time-frequency domain via code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein the plurality of the 1-bit control signals includes a plurality of 1-bit control signals for a specific transmitting side.

EFFECT: high efficiency and reliability of multiplexing.

10 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a mobile station having: a module for correcting the transmission time interval which is configured to determine the transmission time interval in the mobile station - base station direction in units of the length of transmission time intervals in the base station - mobile station direction, such that the transmission time interval in the mobile station - base station direction is longer than that in the base station - mobile station direction; a transmission module configured to transmit a signal in the mobile station - base station direction in a transmission time interval defined by the module for correcting the transmission interval.

EFFECT: increase in the information transmission unit element on the time axis or frequency axis depending on conditions of the communication environment, which enables to lower the frequency of introducing the control channel and increase data transmission efficiency.

2 cl, 11 dwg

FIELD: information technology.

SUBSTANCE: base station communicates with a mobile station using OFDM via a downlink. The base station includes a clock signal generating module which generates an additional clock channel, a multiplication module which multiplies the scrambling code with the additional clock channel, and a transmitting module which transmits the additional clock channel which has been multiplied with the scrambling code. Cell-unique information is detected using the additional clock channel.

EFFECT: faster cell search.

17 cl, 13 dwg

FIELD: information technology.

SUBSTANCE: transmitting device has a frequency scheduling unit which is configured to allocate each user with either frequency blocks, which are serial carrier frequency blocks obtained by dividing the frequency band of the system, or distributed frequency blocks which are carrier frequency blocks which are discretely distributed in the frequency band of the system; and a conversion unit which is configured to associate transmitted data to frequency blocks or distributed frequency blocks in accordance with the allocation result. The frequency scheduling unit is configured to allocate distributed frequency blocks using frequency blocks as structural units and allocating sub-blocks obtained by dividing corresponding distributed frequency blocks.

EFFECT: high transmission capacity which enables the system to support localised and distributed data transmission.

23 cl, 41 dwg

FIELD: communications engineering.

SUBSTANCE: proposed band selection method for mobile orthogonal frequency division multiple access communication system includes following steps to classify procedures of band selection between sending end and receiving ends with respect to original band selection process, passband width selection process, and periodic band selection process: determination of source band selection code (SC)number for source band selection process; SC number to request passband width for passband width request selection process and periodic SC number for periodic band selection process; determination of periodic SC deferment value in compliance with periodic SC number, and transmission of source SCs, passband width request SC, periodic SCs, and periodic SC deferment values on receiving ends.

EFFECT: minimized time for band selection access.

22 cl, 3 dwg, 4 tbl

FIELD: communications engineering.

SUBSTANCE: stationary wireless access system has, as a rule, user's room equipment unit connected through Ethernet interface to personal computer or to local network and base station unit connected through Ethernet interface to network. User's room equipment unit as such is easily installed by user while base station unit is usually mounted on mast at distance of 1 to 5 miles (1/6 to 8 km) from user's room equipment unit. Both the latter and base station unit usually incorporate integrated transceiver/data switch that provides for radio-frequency communications in the range of 2.5 to 2.686 GHz. Multiplexing with orthogonal frequency division of signals is used during transmission between user's room equipment units and base station ones over ascending and descending lines.

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

70 cl, 19 dwg

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

SUBSTANCE: start-stop communication system that has on sending end signal shaping and transfer unit 1 and on receiving end, receiver 2, amplitude detector 3, low-pass filter 4, first comparator 6, memory device 7, shift register 8, first decoder 9, switch 10, synchronizing unit 11, pulse shaper 12, pulse burst shaper 13, binary counters 14, 17, signal retrieval and storage device 19, and threshold device 5 is provided in addition with newly introduced second comparator 15, RS flip-flop 16, and second decoder 18.

EFFECT: reduced malfunction probability of proposed communication system.

1 cl, 3 dwg

FIELD: mobile telecommunication systems.

SUBSTANCE: device for decreasing relation of pike power to average power signal, sent along N(=2r) sub-bearing lines in transmitting device, having encoders for block encoding of w input data, where r - real number > 2, and output of N code symbols, has: serial-parallel converter for transforming data flow to w-(r-2) parallel data flows, where w - length of information word, first coder for receipt of w/2 parallel data flows from w-(r-2) parallel data flows from serial/parallel converter, block encoding of w/2 parallel data flows and output of N/2 first code symbols, generator of input operators for generation of r-2 data flows of input operators, in accordance to w-(r-2) parallel data flows, and second coder for receiving parallel data flows from serial/parallel converter, which were not received at first coder and (r-2) data flows from input operators, block encoding of received data flows and output of N/2 second code symbols, while r-2 data flows of input operators provide for complementarity of N code symbols.

EFFECT: higher efficiency, higher reliability.

6 cl, 22 dwg

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

SUBSTANCE: satellite system uses modulation with temporal signals separation and single-frequency network of ground-based re-emitting stations, each of which introduces a delay to ground signal. Delay allows to provide for coincidence of time of receipt of early modulated signal in the center of ground broadcasting zone with time of receipt of appropriate late modulated signal, thus improving switching between ground and satellite signals in receiver. Delay also compensates processing delay, occurring during conversion of satellite modulated stream under direct visibility conditions to multi-frequency modulated stream for transmission of satellite modulated stream under direct visibility conditions to user receivers. Delay is also adjusted in accordance to distance difference between each ground-based re-emitting station and satellite and between each station and center of ground-based broadcasting zone. Adjustment as described above optimizes receipt of temporal signals separation modulated and multi-frequency modulated signals by means of synchronization in the center of single-frequency system of phase of multi-frequency modulated signals, re-emitted from re-emitting stations of single-frequency system.

EFFECT: increased quality of radio-signal receipt.

8 cl, 12 dwg

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

SUBSTANCE: in accordance to method, first series of preamble is generated, wherein odd data of input series of preamble are transformed to zero data, and even data of aforementioned series are transformed to nonzero data, first series of preamble is transmitted through one of two antennas, second preamble series is generated, wherein even data of input series of preamble are transformed to zero data, and odd data of aforementioned series are transformed to nonzero data, second series of preamble is transmitted through another antenna.

EFFECT: increased efficiency.

6 cl, 10 dwg

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

SUBSTANCE: system for transmitting discontinuous information contains at transmitting side information sources, multipliers, adder, clock generator, Walsh functions generator, 2n keys (where 2n - number of outputs of Walsh functions generator) and frequency splitter, two elements of one-sided conductivity and 2n additional multipliers, and on receiving side - clock generator, Walsh functions generator, multipliers, integrators, information receivers, 2n keys and frequency splitter, two elements of one-sided conductivity and 2n additional multipliers. As a new addition, on transmitting side two one-sided conductivity elements are inserted and 2n additional multipliers, and on receiving side - two one-sided conductivity elements and 2n additional multipliers.

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

6 dwg, 1 tbl

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

SUBSTANCE: communication system divides whole range of frequencies onto a set of sub-frequency ranges. Receiver of information about quality of channels receives information about quality of channels for each one of a set of frame cells, occupied during first time span by a set of frequency-time cells, occupied by second time span and a given number of sub-frequency ranges, transferred via check communication channel from receiver. Module for sorting frame cells analyzes information about quality of check communication channels and sorts frame cells in accordance to information about quality of channels. Module for assigning sub-channels, if transfer data exist, transfers data through a frame cell with best channel quality among other frame cells.

EFFECT: increased data transfer speed.

5 cl, 6 dwg

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

SUBSTANCE: method for decreasing ratio of peak signal power to its average ratio PAPR in multi-frequency communication systems, in which information symbol is formed by a set of signals, each one of which is centered on one of multiple bearing frequencies, is characterized by the fact that in transmitter a set of bearing frequencies is divided on several sections - subsets of bearing frequencies, information symbol, PAPR value of which does not exceed required threshold PAPR0, is transferred via all carriers, information symbol, value PAPR of which exceeds required threshold PAPR0 is divided on several sub-symbol sections, while number of these sections equals number of sub-carrier subsets, each section of symbol is transferred same as full symbol, wherein data are only transferred on one group of carriers, while other carriers are not modulated, in receiver, arrival of incomplete symbol is identified by analysis of amplitudes of carrier signals, which are not modulated in case of symbol division. Multi-frequency communication system is characterized by construction of receiver and transmitter, adapted for execution of operations, included in proposed method.

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

2 cl, 12 dwg

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

SUBSTANCE: the technical result is in increasing accuracy of synchronization of signals with orthogonal frequency multiplexing and that in its turn provides reduction of error possibility at reception of these signals even in such complex propagation conditions as shot-wave range channels. For this in the receiving set of the known equipment two memory blocks, two commutators, a maximum choice selection block, a meter and a time intervals calculation block are introduced.

EFFECT: increases accuracy of signals.

6 dwg

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