CN100558011C - Frame synchronization and the method and system of obtaining cell group information - Google Patents

Abstract

The invention discloses a kind of frame synchronization and obtain method, the another kind of frame synchronization of cell group information and obtain the method for cell group information, a kind of achieve frame synchronously and the cell group information system, the coding method in a kind of Cell searching, a kind of coding/decoding method, the coding/decoding method in the another kind of Cell searching and a kind of decoding device that is used for Cell searching that is used for the encoding device of Cell searching, a kind of Cell searching that obtain.The present invention encodes to comprising with the combination of the corresponding a plurality of elements of different SSC, obtains having the code word of different arrangement of elements orders, thereby has realized a plurality of SSC multiplexing in a S-SCH symbol; The recipient can obtain frame synchronization and cell group information according to the element value in arrangement of elements order and the element combinations, obtains diversity gain simultaneously, thereby has shortened the time of Cell searching and improved the feasibility of Cell searching.And technical scheme of the present invention has also improved may realize the cell set that detects and the number of sub-district in the cell search process.

Description

Frame synchronization and the method and system of obtaining cell group information

Technical field

The present invention relates to the Synchronous Detection in the mobile communication system, particularly frame synchronization and the method, achieve frame of obtaining cell group information are synchronously and the coding/decoding method of the system that obtains of cell group information, the coding method in the Cell searching, the encoding device that is used for Cell searching, Cell searching and be used for the decoding device of Cell searching.

Background technology

In mobile communication system, as the user terminal (User Equipment) of receiving side signal process by Cell searching, realize signalling with network side on time and frequency synchronously, obtain simultaneously the cell identity sign (Identity, ID).Fig. 1 is the schematic flow sheet of existing cell search process.As shown in Figure 1, cell search process generally includes following steps:

Step 101, (Primary-Synchronization Channel P-SCH) finishes timing synchronization and frequency offset estimating, thereby the time of having realized is gone up the synchronous and Frequency Synchronization of symbol level to utilize primary synchronization channel.

Step 102, (Secondary-Synchronization Channel S-SCH) finishes frame regularly synchronously, and obtains cell set ID by decoding from the S-SCH symbol to utilize secondary synchronization channel.

In some mobile communication system, for example (each radio frames the inside comprises a plurality of S-SCH symbols for Orthogonal FrequencyDivision Multiplexing, the OFDM) Long Term Evolution of technology (LTE) system based on OFDM.Therefore, in this step, be used for achieve frame synchronously and the S-SCH symbol that obtains cell set ID be a plurality of OFDM symbols, promptly utilize a plurality of S-SCH symbols to finish the detection of frame synchronization and cell group information.

Wherein, a plurality of S-SCH symbols that comprise in each radio frames are identical, but the particular content of a plurality of S-SCH symbols carry in the same radio frames may be different mutually.

Step 103, utilizing reference signal is the information that pilot tone comprises, and finally determines to finish Cell searching by sub-district ID.

Yet, in some cases, in the step 102 of above-mentioned flow process, can there be following problem:

With the LTE system is example, this system need carry out different system (Inter-RAT) with other mobile communication system (as gsm system) and switch, the real needs that Inter-RAT switches and implementation procedure are referring to " Siemens; " Interworking between LTE and GSM-Monitoring LTE fromGSM ", 3GPP Tdoc RAN1, R1-070081; Sorrento; Italy, 15-19 Jan., 2007. ".But the signal frame length in two systems may be different, therefore, just can't guarantee realize Inter-RAT switch after achieve frame synchronous.

For example, can (there be 2 S-SCH symbols in frame length in the LTE system for 10ms in each radio frames, be the 5ms that is spaced apart between per two S-SCH symbols), and the frame length of a frame is shorter in the gsm system, at this moment, according to the demand of mentioning in the preceding list of references need guarantee the LTE system must be in 5ms all processes of completing steps 102.And if in a radio frames, use two identical S-SCH symbols, just can't judge that at receiving terminal the S-SCH symbol in which 5ms is only real frame zero-time.

In this case, because the existing mode that adopts a plurality of S-SCH symbols to carry out the frame synchronization detection can not guarantee the realization that Inter-RAT switches, thereby feasible lower.And, adopting a plurality of S-SCH to carry out frame synchronization and obtain cell group information and need expend the long time, detection efficiency is not high, thereby makes Cell searching need expend the more time, and search efficiency is lower.

Summary of the invention

In view of this, a main purpose of the present invention is, a kind of frame synchronization is provided and obtains the method for cell group information, can shorten the time of Cell searching and improve the feasibility of Cell searching.

Another main purpose of the present invention is, another kind of frame synchronization is provided and obtains the method for cell group information, can shorten the time of Cell searching and improve the feasibility of Cell searching.

Another main purpose of the present invention is, provides a kind of achieve frame synchronously and the system that obtains of cell group information, can shorten the time of Cell searching and improve the feasibility of Cell searching.

Another main purpose of the present invention is, the coding method in a kind of Cell searching is provided, and can shorten the time of Cell searching and improve the feasibility of Cell searching.

Another main purpose of the present invention is, a kind of encoding device that is used for Cell searching is provided, and can shorten the time of Cell searching and improve the feasibility of Cell searching.

Also main purpose of the present invention is, the coding/decoding method in a kind of Cell searching is provided, and can shorten the time of Cell searching and improve the feasibility of Cell searching.

Another main purpose of the present invention is, the coding/decoding method in the another kind of Cell searching is provided, and can shorten the time of Cell searching and improve the feasibility of Cell searching.

Another main purpose of the present invention is, a kind of decoding device that is used for Cell searching is provided, and can shorten the time of Cell searching and improve the feasibility of Cell searching.

According to an above-mentioned main purpose, embodiment of the present invention provides a kind of frame synchronization and has obtained the method for cell group information, comprising:

Arrangement of elements rule according to setting in advance is provided with at least one set of code words, and each code word in every group comprises identical element but have different arrangement of elements orders, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Transmit leg is selected one group and is sent to the recipient from described at least one set of code words;

The recipient detects the code word that receives, and according to testing result and the described arrangement of elements rule that sets in advance, the code word that receives is continuously carried out diversity to be merged, code word after the diversity merging and at least one set of code words of described setting are compared, determine the actual value of element in the code word after diversity merges, obtain the information of frame synchronization information and cell set.

According to another above-mentioned main purpose, embodiment of the present invention provides another kind of frame synchronization and has obtained the method for cell group information, comprising:

Arrangement of elements rule according to setting in advance is provided with at least one set of code words, and each code word in every group comprises identical element but have different arrangement of elements orders, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Transmit leg is selected one group and is sent to the recipient from described at least one set of code words;

The recipient detects the code word that receives, and at least one set of code words of testing result and described setting is compared, and determines the actual value of testing result, obtains the information of frame synchronization information and cell set.

According to another above-mentioned main purpose, embodiment of the present invention provides the system that a kind of achieve frame is synchronous and cell group information obtains, and comprising: transmit leg and recipient, wherein,

Described transmit leg is used to store at least one set of code words, and each code word in every group comprises identical element but have different arrangement of elements orders, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality; From at least one set of code words of storage, select one group and send to described recipient;

Described recipient is used for storing at least one set of code words identical with described transmit leg and the arrangement of elements rule of described code word; The code word that receives is detected, and according to the arrangement of elements rule of testing result and storage, the code word that receives is continuously carried out diversity to be merged, code word after the diversity merging and at least one set of code words of storage are compared, determine the actual value of element in the code word after diversity merges, obtain the information of frame synchronization information and cell set.

According to another above-mentioned main purpose, embodiment of the present invention provides the coding method in a kind of Cell searching, comprising:

The element set that at least one includes a plurality of elements is set;

According to the arrangement of elements rule that sets in advance the element set of described setting is encoded, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders.

According to another above-mentioned main purpose, embodiment of the present invention provides a kind of encoding device that is used for Cell searching, comprising: element information unit and coding arithmetic element, wherein,

Described element information unit is used for the storage element queueing discipline and at least one includes the element set of a plurality of elements; Arrangement of elements rule and at least one element set of storage are offered described coding arithmetic element;

Described coding arithmetic element, be used for described at least one group element group being encoded according to the arrangement of elements rule that sets in advance, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders.

According to above-mentioned also main purpose, embodiment of the present invention provides the coding/decoding method in a kind of Cell searching, comprising:

According to the arrangement of elements rule that sets in advance at least one set of code words identical with transmit leg is set, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Comprise that with code word described setting the code word of identical element number detects to that receive, and according to testing result and set in advance the arrangement of elements rule, the code word that receives is continuously carried out diversity to be merged, code word after the diversity merging and at least one set of code words of setting are compared, determine the actual value of element in the code word after diversity merges, obtain the information of frame synchronization information and cell set.

According to another above-mentioned main purpose, embodiment of the present invention provides the coding/decoding method in the another kind of Cell searching, comprising:

According to the arrangement of elements rule that sets in advance at least one set of code words identical with transmit leg is set, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Comprise that with code word described setting the code word of identical element number detects to that receive, and at least one set of code words of testing result and setting is compared, determine the actual value of testing result, obtain the information of frame synchronization information and cell set.

According to another above-mentioned main purpose, embodiment of the present invention provides a kind of decoding device that is used for Cell searching, comprising: decoded information unit, diversity merge cells and decoding arithmetic element, wherein,

Described decoded information unit, be used for storing arrangement of elements rule and at least one set of code words identical with the code word transmit leg, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality; At least one set of code words of storage is offered the decoding arithmetic element; The arrangement of elements rule of storage is offered diversity merge cells and decoding arithmetic element;

Described diversity merge cells is used for comprising that with code word described storage the code word of equal number element detects to that receive, and according to the arrangement of elements rule that testing result and decoding information unit provide, the code word that receives is continuously carried out diversity merge; Code word after the diversity merging is offered the decoding arithmetic element;

Described decoding arithmetic element, at least one set of code words that code word after the diversity that is used for that the diversity merge cells is provided merges and decoded information unit provide compares, determine the actual value of element in the code word after diversity merges, according to the arrangement of elements rule of storage, obtain the information of frame synchronization information and cell set.

This shows that the technical scheme of embodiment of the present invention has following beneficial effect:

By to comprising (Secondary Synchronization Code with different SSC, secondary synchronization code or S-SCH sequence) combination of corresponding a plurality of elements encodes, obtain having identical element but the different code word that puts in order, thereby realized a plurality of SSC multiplexing in a S-SCH symbol; The recipient obtains frame synchronization and cell group information according to the element value in arrangement of elements order and the element combinations, obtains diversity gain simultaneously.Thereby the technical scheme of embodiment of the present invention has improved the efficient that frame synchronization and cell group information obtain, and the scheme that makes frame synchronization and cell group information obtain has higher feasibility, and then shortens the time of Cell searching and improved the feasibility of Cell searching.And the coding method that embodiment of the present invention provides has also improved and may realize the cell set that detects and the number of sub-district in the cell search process, has further improved the feasibility of Cell searching.

Description of drawings

Fig. 1 is the schematic flow sheet of existing cell search process.

Fig. 2 is the exemplary process diagram of coding method in the embodiment of the present invention.

Fig. 3 is the exemplary process diagram of coding/decoding method in the embodiment of the present invention.

The system construction drawing that Fig. 4 is synchronous for achieve frame in the embodiment of the present invention and cell group information obtains.

Fig. 5 is frame synchronization in the embodiment of the present invention and the method flow diagram that obtains cell group information.

Fig. 6 is the effect schematic diagram of cell search process in the embodiment of the present invention.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

The basic thought of embodiment of the present invention is: carry out frame synchronization and cell group information obtains in a S-SCH symbol with a plurality of SSC are multiplexing; Simultaneously, the mode that adopts diversity to merge makes and obtain diversity gain in frame synchronization and cell group information acquisition process.

Specifically, be provided with exactly M respectively with M the mutually different element that SSC is corresponding, it is element set { 1,2, ..., M}, a plurality of elements in M the element are multiplexing in a S-SCH symbol, and in a S-SCH symbol, transmit the SSC set of representative frame synchronizing information and cell group information by the mode that rearranges a plurality of elements.

Wherein, M is a positive integer; Each SSC is unique sequence, and promptly each SSC and other SSC are different; For multiplexing n S-SCH symbol (n=1 ..., N, wherein N is the quantity of S-SCH symbol in the radio frames) in a plurality of (K, K is the positive integer less than M) element, the code word that can be expressed as:

C(n)＝(c ₁(n)，c ₂(n)，...，c _K(n))，c ₁(n)∈{1，2，...，M}。

The set of element value and the putting in order of element that comprise in the above-mentioned code word are represented cell group information and frame synchronization information respectively.

The code word correspondence that comprises different elements is mutually different, i.e. the information of Du Te cell set, the information that cell set ID etc. can the unique identification cell set for example, value are g (the cell set ID of 1≤g≤G), corresponding and the interior code word C of n S-SCH symbol _g(n), C _g(n) can be expressed as:

$C_g\left(n\right)=(c_1^{\left(g\right)}\left(n\right),c_2^{\left(g\right)}\left(n\right),...,c_K^{\left(g\right)}\left(n\right)),$ $c_1^{\left(g\right)}\left(n\right)\∈\{\mathrm{1,2},...,M\},$

Promptly by element c ₁ ^(g)(n), c ₂ ^(g)(n) ..., c _K ^(g)(n) code word of Gou Chenging represents that value is the cell set ID of g.

Like this, the value of the element that the S-SCH symbol in radio frames can be by multiplexing portion is within it represented cell set ID, represents frame synchronization information in proper order by the arrangement of elements of multiplexing portion within it.

For G cell set ID, need G kind element combinations; For each cell set ID, promptly each element combinations needs N code word to distribute to N S-SCH symbol again.So, can getable code word always have N * G behind the coding.

Wherein, G and N are positive integer.

In when decoding, can the element of the code word inside that receives be detected, for example the character signal that receives is combined into line correlation calculating with all possible arrangement of elements.

In the present embodiment, identical element can appear in the relevant position that only needs to guarantee a plurality of code words (by a plurality of S-SCH symbols carry), can realize that diversity merges.Thereby can be with in a plurality of S-SCH symbols, promptly the correlation values of the identical element that obtains from a plurality of code words merges to improve the detection performance.Certainly, a code word can not be merely repeated in a plurality of S-SCH symbols in a radio frames,, frame synchronization can't be finished in order to avoid produce a plurality of frame synchronization points.

Realize in the present embodiment that the precondition that diversity merges comprises at least:

Code word C _g(n) (n＞1) is by code word C _g(1) element in rearranges acquisition; All code words are different, to guarantee to finish frame synchronization.And the structure that rearranges must be guaranteed: for all n, C _g(n) be different; On all N symbol, all transmit an identical element corresponding, merge, and/or the corresponding element of a plurality of and SSC transmits on different frequency locations, to guarantee the frequency diversity merging to guarantee time diversity with SSC.

Below, to achieve frame in the present embodiment synchronously and cell group information system, the frame synchronization obtained and the method for obtaining cell group information carry out the generality explanation.

Achieve frame system synchronous and that cell group information obtains comprises in the present embodiment: transmit leg and recipient.

Transmit leg, storage G set of code words, each group comprise that K element comprising in N code word and each code word is not identical entirely with K element in other set of code words, and the code word of N on the same group comprises identical element but arrangement of elements is in proper order different; From the G set of code words of storage, select one group and send to the recipient.

The recipient, the identical G set of code words and the arrangement of elements rule of code word in storage and the transmit leg; The code word that receives is detected, and, the continuous code word that receives is carried out diversity merge according to the arrangement of elements rule of testing result and storage; The code word after the diversity merging and the G set of code words of storage are compared, according to the actual value of element in the code word after the definite diversity merging of the arrangement of elements rule of storage, the information of acquisition frame synchronization information and cell set.

In the said system, the information of the corresponding cell set of each group in the G group code word, for example cell set ID; The corresponding SSC of each element that code word comprises in every group; The recipient decodes to the code word that receives, and has realized the diversity merging, makes when obtaining frame synchronization and obtaining cell group information, has also obtained diversity and has merged gain.

In the said system, being stored in transmit leg and recipient's N * G code word, is to obtain by the coding method in the present embodiment.

In the practical application, the recipient also can not carry out diversity and merge, but directly the G set of code words of testing result and storage is compared the information of acquisition frame synchronization information and cell set.But with respect to the mode that diversity merges, this scheme can't obtain diversity gain.

Fig. 2 is the exemplary process diagram of coding method in the embodiment of the present invention.As shown in Figure 2, the coding method in the present embodiment may further comprise the steps:

Step 201 is provided with G element set, comprises K element in each element set, and not identical entirely with element in other element set;

In this step, the element of the K in each code word is from setting in advance M (M＞K) select the individual mutually different element; The information of the corresponding cell set of each in G element set, for example information that cell set ID etc. can the unique identification cell set; The corresponding SSC of each element in M element, promptly the SSC according to M uniqueness is provided with M element;

Step 202 is encoded to G the element set that is provided with according to the arrangement of elements rule that sets in advance, and obtains the G set of code words, and each group comprises N code word, and the code word of N on the same group comprises identical element but the arrangement of elements order is different;

In this step, the code word of the N in every set of code words is respectively applied for N slot transmission in a radio frames, and N time slot can be the time slot of continuous time slot, equally spaced time slot or unequal interval; Arrangement of elements rule is for guaranteeing the arrangement of elements mutually different any regular in proper order in N the code word behind the coding.

After coding, N * G the code word that coding is obtained is arranged at transmit leg and recipient respectively.By the cell set ID of transmit leg, select a set of code words as sending to the recipient according to the business datum affiliated subdistrict of the current transmission of Traffic Channel; The recipient decodes to the code word that receives according to the code word and the arrangement of elements rule that obtain behind the coding of storing again, thereby achieve frame is synchronous and the detection of cell group information.

Fig. 3 is the exemplary process diagram of coding/decoding method in the embodiment of the present invention.As shown in Figure 3, the coding/decoding method in the present embodiment may further comprise the steps:

Step 301 is provided with the G set of code words identical with transmit leg, and each group comprises that K element comprising in N code word and each code word is not identical entirely with K element in other set of code words, and the code word of N on the same group comprises identical element but the arrangement of elements order is different;

Step 302 detects the code word that comprises K element that receives, and according to the arrangement of elements rule of testing result with the G set of code words that sets in advance, the continuous code word that receives is carried out diversity merge;

In this step, continuous code word is meant the code word in the continuous S-SCH symbol, i.e. the code word that the code word that receives several times continuously, rather than finger is received must be in time continuously; The arrangement of elements that sets in advance rule during with coding the arrangement of elements rule of use identical;

Step 303 compares code word after the diversity merging and N * G code word of setting, according to predefined arrangement of elements rule, determines the actual value of element in the code word after diversity merges, and obtains the information of frame synchronization information and cell set.

In this step, determine frame synchronization information in proper order according to the arrangement of elements of having determined actual value in predefined arrangement of elements rule and the code word; According to the actual value of the element that comprises in the code word, determine the information of cell set, for example the information that cell set ID etc. can the unique identification cell set.

In the practical application, in step 302～step 303, also can not carry out diversity and merge, but directly the G set of code words of testing result and setting be compared the information of acquisition frame synchronization information and cell set.But with respect to the mode that diversity merges, this scheme can't obtain diversity gain.

Below, frame synchronization detection system and method in the present embodiment are elaborated.

The system construction drawing that Fig. 4 is synchronous for achieve frame in the embodiment of the present invention and cell group information obtains.As shown in Figure 4, achieve frame system synchronous and that cell group information obtains comprises in the present embodiment: transmit leg and recipient.

Transmit leg comprises: code word memory cell, main control unit and signal transmitter unit.

Code word memory cell, the G set of code words that sets in advance of storage, each group comprise that K element comprising in N code word and each code word is not identical entirely with K element in other set of code words, and the code word of N on the same group comprises identical element but arrangement of elements is in proper order different; The G set of code words of storage is offered main control unit.

Main control unit according to the cell set ID of the business datum affiliated subdistrict of the current transmission of Traffic Channel, is selected one group and is offered the signal transmitter unit from the G set of code words of code word cell stores.

The signal transmitter unit will be mapped to from the code word of master control unit on the subcarrier of S-SCH and send to the recipient.

Specifically, the signal transmitter unit can be with from the element in the code word of master control unit, is mapped among the S-SCH on the continuous sub-carriers, so that the recipient obtains better effect when incoherent detection; Also can be mapped among the S-SCH on the equally spaced subcarrier, so that the recipient obtains better effect when coherent detection.

In the present embodiment, transmit leg can comprise one or more antenna, like this, the signal transmitter unit can pass through antenna, and employing time switched transmit diversity (Time switched transmitdiversity, TSTD) mode sends, and promptly the S-SCH symbol can use different antennas to launch transmission on different time-gap, but only uses a transmitting antenna on each time slot; Also can adopt frequency switched transmit diversity (Frequency switched transmit diversity, FSTD) mode sends, the different piece that is the S-SCH symbol uses different antennas to launch transmission, can use a plurality of antennas multiplexing on frequency on each time slot.

The recipient is the equipment with decoding function, comprising: decoded information unit, signal receiving unit, diversity merge cells, decoding arithmetic element.

Identical with transmit leg G element set and arrangement of elements rule are stored in the decoded information unit; G element set of storage offered the decoding arithmetic element; The arrangement of elements rule of storage is offered diversity merge cells and decoding arithmetic element.

Signal receiving unit receives the code word on the S-SCH subcarrier, and offers the diversity merge cells.

The diversity merge cells detects the code word from signal receiving unit, and according to the arrangement of elements rule that testing result and decoding information unit provide, the continuous code word that receives is carried out diversity merge; Code word after the diversity merging is offered the decoding arithmetic element.

The decoding arithmetic element, the code word after the diversity that the diversity merge cells is provided merges compares with G the element set that the decoded information unit provides, and determines the actual value of element in the code word after the diversity merging; According to the arrangement of elements rule and the code word of having determined the actual value of element of storage, obtain the information of frame synchronization information and cell set.

In the practical application, can also comprise encoding device in the said system, be used to generate the G set of code words, and offer transmit leg and recipient.Encoding device comprises: element information unit, coding arithmetic element and signal transmitter unit.

The element information unit, storage element queueing discipline and G element set that comprises K element, and the K that comprises in each an element set element is not identical entirely; The arrangement of elements rule and a described G element set of storage are offered described coding arithmetic element.

Wherein, the SSC of the corresponding uniqueness of each element.

Described coding arithmetic element, according to the arrangement of elements rule that the element information unit provides, described G the element set that the element information unit provides encoded, obtain the G set of code words, each group comprises N code word, and N on the same group comprises identical element but the arrangement of elements order is different; The described G set of code words that obtains is offered the code word memory cell of described transmit leg and recipient's decoded information unit.

Wherein, the information of the corresponding cell set of each in G element set, for example therefore cell set ID, is to select from G the element set that generates according to corresponding cell set ID.

In the frame synchronization detection system of present embodiment, transmit leg and recipient's built-in function unit is a preferable implementation, also can be by other the incompatible realization of functional unit group; Antenna can be a physical antenna, or by a fixing virtual-antenna obtaining of precoding vectors matrix (precoding vectors switched diversity); Encoding device also can be used as a functional unit of transmit leg and/or recipient inside.

More than, be the detailed description of and system that cell group information obtain synchronous to achieve frame in the present embodiment, below, frame synchronization in the present embodiment and the method for obtaining cell group information are elaborated.

Fig. 5 is frame synchronization in the embodiment of the present invention and the method flow diagram that obtains cell group information.As shown in Figure 5, the frame synchronization in the present embodiment may further comprise the steps with the method for obtaining cell group information:

Step 501 is provided with M mutually different element and arrangement of elements rule.

In this step, the M of a setting element corresponds respectively to M SSC.

In the present embodiment, the arrangement of elements rule can for:

c _i(n)=c _kAnd c (n+1), _k(n)=c _i(n+1) (1.1)

This arrangement of elements rule, be arrangement of elements rule 1, can guarantee that the diversity in the frame synchronization testing process merges, no matter what time-slot sequence n at this moment is, the recipient can merge the identical element in continuous two symbols, detects performance thereby improve.Above-mentioned formula (1.1) merged obtain c _i(n)=c _i(n+2), the repetition period of promptly representing code word is 2.Under the situation that adopts arrangement of elements rule 1 to encode, suppose when crack n+1 in office, a certain element c in this code word _k(n+1) be known in the position of previous time slot n, so when the recipient detects a certain complete code word of certain time slot, before and after can knowing by known arrangement of elements rule 1 in the time slot position of identical element carry out diversity and merge the frame head position that further can infer this radio frames with this.

In the present embodiment, the arrangement of elements rule can also be expressed as a permutation matrix, and promptly the arrangement of elements rule 2:

P ^N＝I

P ⁿ≠ I, 1≤n＜N and C (n+1) ^T=PC (n) ^T(1.2)

Wherein, T represents the transpose of a matrix conversion, and I is a unit matrix.

Arrangement of elements rule 2 also can be guaranteed the branch set in the frame synchronization testing process.Be that the recipient can be when detecting a certain complete code word of certain time slot, the position of identical element and carry out diversity and merge the frame head position that further can infer this radio frames with this in the time slot before and after can knowing by known arrangement of elements rule 2.

Step 502 according to M mutually different element, is provided with G element set that comprises K element, distinguishes corresponding G cell set ID, and the K in the K that comprises in each an element set element and other element set (K＜M) individual element is not identical entirely.

Step 503 is encoded to G element set according to the arrangement of elements rule that is provided with, and obtains N code word behind each element set coding, promptly obtains N * G code word altogether.N an on the same group code word comprises identical element but the arrangement of elements order is different.

In the present embodiment, can be after step 502, the arrangement of elements rule of setting in G element set being provided with and the step 501 is stored in transmit leg and recipient simultaneously, generate identical N * G code word by transmit leg simultaneously with the recipient; Also can after step 503, directly N * G the code word of obtaining be stored in transmit leg and recipient simultaneously.Like this, transmit leg can select a corresponding set of code words to send to the recipient according to different cell set ID; The recipient can be when detecting a certain complete code word of certain time slot, know the position of identical element in the time slot of front and back according to the arrangement of elements rule, and carry out diversity and merge, further can infer the frame head position of this radio frames with this, and N * G code word and the code word that receives carried out related operation, realize detecting.

In the above-mentioned steps 502～503,, must guarantee that the corresponding code word of transmitting must comprise identical element c for a specific cell set ID in a radio frames for the diversity merging of achieve frame synchronous detecting _i ^(g)(n).

Coding example 1: set M=32, promptly element set 1,2 ..., 32} (setting and 32 SSC), K=2 (from 32 SSC, choosing 2, multiplexing in a S-SCH symbol), N=2 (there are 2 S-SCH symbols in each radio frames).Owing to must guarantee that the element in the code word behind each element set and the coding all is unique, promptly mutually different, therefore, under the situation of K=2, all combinations (1 below can when element set is set, getting rid of, 1), (2,2), (3,3) ..., (32,32), remaining element combinations number is that (32 * 32-32)/2=496, promptly G=496 can finish the detection of 496 cell set ID and frame synchronization by a S-SCH symbol.The element set of supposing a specific cell set ID correspondence comprises 5 and 21, then utilizes the arrangement of elements rule that sets in advance that this element set is encoded.If adopt the arrangement of elements rule 1 of present embodiment, then cataloged procedure can for: the code word of setting first S-SCH symbol correspondence in the radio frames is C (1)=(21,5), rearranges this code word then, obtains C (2)=(5,21).Like this, any one comprises the corresponding specific cell set ID of 5 and 21 code word, and wherein frame synchronization (for example numbering n) can be decided by the order that receives in the detected code word 5 and 21.

Coding example 2: set M=16, promptly element set 1,2 ..., 16} (setting corresponding one by one), K=4 (from 16 SSC, choosing 4, multiplexing in a S-SCH symbol), N=2 (2 S-SCH symbols of each radio frames existence) with 16 SSC.Owing to must guarantee that the element in the code word behind each element set and the coding all is unique, promptly mutually different, therefore, under the situation of K=4, can getable element combinations number be 1820, be G=1820, can finish the detection of 1820 cell set ID and frame synchronization by a S-SCH symbol.The element set of supposing a specific cell set ID correspondence comprises 2,5,11,15, then utilizes the arrangement of elements rule that sets in advance that this element set is encoded.If adopt the arrangement of elements rule 2 of present embodiment, then cataloged procedure can for: suppose that we use the code word of setting first S-SCH symbol correspondence in the radio frames as C (1)=(11,2,15,5), rearrange this code word C (2) then ^T=PC (1) ^T, obtain C (2)=(15,5,11,2).

Wherein, $P=\left[\begin{array}{cccc}0& 0& 1& 0\\ 0& 0& 0& 1\\ 1& 0& 0& 0\\ 0& 1& 0& 0\end{array}\right]$

By above-mentioned coding example as seen, the code word of supposing first S-SCH symbol correspondence in the radio frames is C _g(1), when n＞1, code word C _g(n) can obtain according to different arrangements.First code word { 1≤g≤G: C in N code word _g(1) }, can set, for example maximize the minimum range between all code words by some specific design criterion.And above-mentioned coding example can be realized more cell set ID quantity, far away more than in the existing Cell searching desired 170, makes the technical scheme of present embodiment can realize the detection to more cell set and sub-district, has higher feasibility.

Wherein, the minimum range that maximizes between all code words is meant: make the code word C of each cell set ID correspondence _G1(1) each element in is with respect to the code word C of other cell set ID correspondence _Gi(1) each element of relevant position in, the difference maximization of actual value.

Promptly feasible as far as possible $\underset{k=\mathrm{1,1}\≤\mathrm{gi},\mathrm{gj}\≤G}{\overset{K}{\mathrm{\Σ}}}|c_k^{\left(\mathrm{gi}\right)}\left(1\right)-c_k^{\left(\mathrm{gj}\right)}\left(1\right)|$ The value maximum.

Like this, just can guarantee that the code word of different districts group ID correspondence has bigger difference on the actual value of element, even if code word is interfered in transmission course, the recipient also can be than being easier to and distinguishing exactly the different code words corresponding with different districts group ID.

Step 504, transmit leg are selected one group according to the cell set ID of the business datum affiliated subdistrict of the current transmission of Traffic Channel from the G set of code words that is provided with, and give the recipient by antenna transmission.

In this step, the corresponding a plurality of SSC of a plurality of elements in code word, these elements need be multiplexed on the S-SCH symbol and transmit.Be mapped to the different modes of subcarrier according to SSC, different arrangement modes can obtain frequency diversity in various degree, for example: with the element map of SSC correspondence in the S-SCH on the continuous sub-carriers, perhaps with the element map of SSC correspondence in the S-SCH uniformly-spaced on K the subcarrier.When carrying out incoherent detection, the mode that is mapped on the continuous subcarrier can obtain bigger beneficial effect; When carrying out coherent detection, the mode that is mapped to uniformly-spaced on K the subcarrier can obtain bigger beneficial effect.

In addition, with respect to the temporal frequency diversity, in the process of transmission, utilize whole S-SCH symbols or part S-SCH symbol on the different antennae, can also obtain antenna diversity, antenna in the present embodiment is meant: physical antenna or by a fixing virtual-antenna obtaining of precoding vectors matrix (precoding vectors switched diversity), the antenna diversity mode can comprise:

(Time switched transmit diversity, TSTD), promptly the S-SCH symbol is launched transmission to the time switched transmit diversity on can using with antenna on the different time-gap, but only uses a transmitting antenna on each time slot.

(Frequency switched transmit diversity, FSTD), promptly the different piece of S-SCH symbol uses different antennas to launch transmission to the frequency switched transmit diversity, can use a plurality of antennas multiplexing on frequency on each time slot.

For the coding example 1 in step 502～step 503, can use 2 transmitting antennas of TSTD, for example antenna 1 is used for all odd number time slots, and antenna 2 is used for all even number time slots; Also can use 2 transmitting antennas of FSTD, transmit a S-SCH symbol and can use 2 antennas simultaneously, but put the S-SCH symbol of a transmission part on each antenna, if there be S subcarrier in a S-SCH symbol, only using half subcarrier in this S-SCH symbol on each antenna is that S/2 subcarrier transmits.

Step 505, the recipient detects the code word that receives, and according to testing result and the described arrangement of elements rule that sets in advance, the continuous code word that receives is carried out diversity merge.

Wherein, continuous code word is meant: the code word in the continuous S-SCH symbol, rather than refer to two code words must be in time continuously.

After step 504, before this step, the recipient can obtain sign synchronization and Frequency Synchronization according to the operation in the step 101 in the existing Cell searching as shown in Figure 1.

Because transmit leg is reused the code word that an element set coding obtains in S-SCH, be that the code word that transmit leg sends is: ..., C (1) ..., C (N), C (1), C (2) ..., C (N), ..., this has just guaranteed that the cycle that code word occurs and the repetition period of S-SCH symbol are that the frame length of radio frames is identical.This just makes the recipient can guarantee when not obtaining frame synchronization, receives all code words of a cell set ID correspondence in the repetition period of a S-SCH symbol, i.e. C (1)～C (N).

In this step, recipient's testing process can for: with all alternative sequence, i.e. N * the G of a She Zhiing code word, carry out correlation computations with the code word that receives, obtain comprising in i the code word that n time slot receive the correlation of the element k in certain code word (in the N * G of the setting code word).

Like this, can avoid because code word is interfered in transmission course, the element combinations in the code word that feasible final decoding obtains is not any one in G the element set that is provided with, thereby has avoided the recipient can't obtain the situation of cell set ID.

In this step, the detection mode of employing can be coherent detection, also can be incoherent detection.

The frequency-region signal of j the subcarrier that the recipient receives (element in promptly corresponding certain code word) is:

Y _j＝H _jX _j+N _j，

Wherein, H _jBe channel response, X _jBe the raw information symbol that sends (being the element in the code word that sends of transmit leg), N _jBe noise.

In the present embodiment, suppose that the code word size of transmission is P, the actual value of i code word can be expressed as:

$X_i\left(n\right)=(x_1^{\left(i\right)}\left(n\right),x_2^{\left(i\right)}\left(n\right),...,x_P^{\left(i\right)}\left(n\right)).$

And the recipient has been known the G set of code words of expression different districts group information and the queueing discipline of element, thus the signal that receives can be carried out correlation computations with all N * G code word successively, thus realize detecting.

When adopting coherent detection, element k is the correlation of i element at time slot n with respect to i sequence, can obtain by following process:

${\mathrm{\ρ}}_{\mathrm{ik}}\left(n\right)=\left|\underset{j=1}{\overset{P}{\mathrm{\Σ}}}{\tilde{Y}}_j{X}_j^{\left(i\right)}\right|,$

Wherein, ρ _Ik(n) be correlation as testing result; ${\tilde{Y}}_j=\frac{Y_j{\hat{H}}_j^{*}}{{\hat{H}}_j^{*}{\hat{H}}_j};$ Be H _jChannel estimation value, channel estimating is used to eliminate the influence of fading channel to the transmission data; 1≤i≤P, the code word size that P receives in one-period for the recipient.

When adopting incoherent detection, element k is the correlation of i element at time slot n with respect to i sequence, can obtain by following process:

${\mathrm{\ρ}}_{\mathrm{ik}}\left(n\right)=\left|\underset{j=1}{\overset{P}{\mathrm{\Σ}}}{Y}_j{X}_j^{\left(i\right)}\right|.$

Wherein, ρ _Ik(n) be correlation as testing result; 1≤i≤P, the code word size that P receives in one-period for the recipient.

By above-mentioned detection mode as seen, the recipient is with the code word that receives, carry out the correlation computations of the element of correspondence position respectively with all the N * G code word that is provided with, and the element correlation of all correspondence positions is added up, thereby obtained the code word that receives and the correlation of all N * G code word.

Based on above-mentioned detection mode, for the coding example 1 in step 502～step 503, according to arrangement of elements rule and testing result carry out the diversity merging process can for:

${\widetilde{\mathrm{\ρ}}}_{i1}\left(n\right)={\mathrm{\ρ}}_{i1}\left(n\right)+{\mathrm{\ρ}}_{i2}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i2}\left(n\right)={\mathrm{\ρ}}_{i2}\left(n\right)+{\mathrm{\ρ}}_{i1}(n-1)---\left(1.4\right)$

Based on above-mentioned detection mode, for the coding example 2 in step 502～step 503, according to arrangement of elements rule and testing result carry out the diversity merging process can for:

${\widetilde{\mathrm{\ρ}}}_{i1}\left(n\right)={\mathrm{\ρ}}_{i1}\left(n\right)+{\mathrm{\ρ}}_{i3}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i2}\left(n\right)={\mathrm{\ρ}}_{i2}\left(n\right)+{\mathrm{\ρ}}_{i4}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i3}\left(n\right)={\mathrm{\ρ}}_{i3}\left(n\right)+{\mathrm{\ρ}}_{i1}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i4}\left(n\right)={\mathrm{\ρ}}_{i4}\left(n\right)+{\mathrm{\ρ}}_{i2}(n-1)---\left(1.5\right)$

Wherein,

For diversity merges correlation matrix afterwards.

This diversity merges mode can also be expanded, for example in a radio frames, comprise when more S-SCH symbol, promptly more a plurality of S-SCH symbols can be used as correlation accumulative total, for the coding example 1 in step 502～step 503, this process can for:

${\widetilde{\mathrm{\ρ}}}_{i1}\left(n\right)={\mathrm{\ρ}}_{i1}\left(n\right)+{\widetilde{\mathrm{\ρ}}}_{i2}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i2}\left(n\right)={\mathrm{\ρ}}_{i2}\left(n\right)+{\widetilde{\mathrm{\ρ}}}_{i1}(n-1)---(1.6)$

For the coding example 2 in step 502～step 503, this process can for:

${\widetilde{\mathrm{\ρ}}}_{i1}\left(n\right)={\mathrm{\ρ}}_{i1}\left(n\right)+{\widetilde{\mathrm{\ρ}}}_{i3}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i2}\left(n\right)={\mathrm{\ρ}}_{i2}\left(n\right)+{\widetilde{\mathrm{\ρ}}}_{i4}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i3}\left(n\right)={\mathrm{\ρ}}_{i3}\left(n\right)+{\widetilde{\mathrm{\ρ}}}_{i1}(n-1)$

${\widetilde{\mathrm{\ρ}}}_{i4}\left(n\right)={\mathrm{\ρ}}_{i4}\left(n\right)+{\widetilde{\mathrm{\ρ}}}_{i2}(n-1)---(1.7)$

Step 506, the code word after the recipient merges diversity compares with all code words that set in advance, and determines the actual value of element in the code word after diversity merges.

This step can be the decode procedure of a maximum likelihood estimation, is expressed as:

$C^{*}\left(n\right)=\arg \underset{\left(c_i\right)\∈\mathrm{\Ω}}{\max }\underset{k=1}{\overset{K}{\mathrm{\Σ}}}{\widetilde{\mathrm{\ρ}}}_{c_{i}k}\left(n\right)---\left(1.8\right)$

Wherein, C ^*(n) for having determined the code word of the actual value of element; Comprised N * G code word in the set omega.

Like this, the code word of maximal correlation peak value correspondence can be defined as C ^*(n).

Step 507 according to predefined arrangement of elements rule and the code word of having determined the actual value of element, obtains the information of frame synchronization information and cell set.

In this step, according to C ^*(n) the element value in is determined cell group information, and cell set ID for example is according to C ^*(n) arrangement of elements in is determined frame synchronization information in proper order.

So far, this flow process finishes.

Fig. 6 is the frame synchronization detection method effect schematic diagram in the embodiment of the present invention.As shown in Figure 6, the frame synchronization detection scheme of present embodiment is used for Cell searching, and serve as that Ha Dema (Hadamard) sequence, M=32, K=2 through the modulation of Gray (Golay) complementary series, the Cell searching time when the signal to noise ratio (snr)=10dB are example with 170 cell set ID, SSC, cell search process after the diversity of employing present embodiment merges, with respect to adopt not that diversity merges scheme, obviously shortened time of Cell searching.

Execution mode is encoded to having comprised with the combination of the corresponding element of different SSC, obtains having the code word of different arrangement of elements orders, thereby has realized a plurality of SSC multiplexing in a S-SCH symbol; The recipient can obtain frame synchronization and cell group information according to arrangement of elements order and element combinations, obtains diversity gain simultaneously.Simultaneously, the technical scheme of above-mentioned execution mode has also further shortened the time of Cell searching, has improved the efficient and the feasibility of Cell searching.And the coding method that embodiment of the present invention provides has also improved and may realize the sub-district detected or the number of cell set in the cell search process, has further improved the feasibility of Cell searching.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.

Claims (37)

1, a kind of frame synchronization and obtain the method for cell group information is characterized in that, may further comprise the steps:

Arrangement of elements rule according to setting in advance is provided with at least one set of code words, and each code word in every group comprises identical element but have different arrangement of elements orders, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Transmit leg is selected one group and is sent to the recipient from described at least one set of code words;

The recipient detects the code word that receives, and according to testing result and the described arrangement of elements rule that sets in advance, the code word that receives is continuously carried out diversity to be merged, code word after the diversity merging and at least one set of code words of described setting are compared, determine the actual value of element in the code word after diversity merges, obtain the information of frame synchronization information and cell set.

2, frame synchronization as claimed in claim 1 and obtain the method for cell group information is characterized in that, describedly at least one set of code words is set is:

The element set that at least one includes a plurality of elements is set;

According to the arrangement of elements rule that sets in advance the element set of described setting is encoded, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders.

3, frame synchronization as claimed in claim 2 and obtain the method for cell group information, it is characterized in that, if the cell set number is G, described at least one element set that is provided with is: according to the number of cell set, set G the element set corresponding with the information of each cell set respectively; Wherein, G is a positive integer.

4, frame synchronization as claimed in claim 3 and obtain the method for cell group information is characterized in that the information of described cell set is cell set identify label ID.

5, frame synchronization as claimed in claim 2 and obtain the method for cell group information is characterized in that the respectively corresponding mutually different sequence of each element in the described element set.

6, as any described frame synchronization in the claim 3 to 5 with obtain the method for cell group information, it is characterized in that, if the code word number in every group is N, N is a positive integer, and N code word in described every set of code words is respectively applied for N slot transmission in a radio frames;

Describedly according to the arrangement of elements rule that sets in advance G the element set that is provided with is encoded to: the code word of n+1 slot transmission of N time slot rearranges acquisition by the code word of n slot transmission according to the arrangement of elements rule;

Wherein, n is more than or equal to 1 and less than the positive integer of N.

7, frame synchronization as claimed in claim 6 and obtain the method for cell group information, it is characterized in that, described arrangement of elements rule is: k element in the code word of n slot transmission, identical with i element in the code word of n+1 slot transmission, and k element in the code word of i element in the code word of n slot transmission and n+1 slot transmission is identical;

I and k are more than or equal to 1 and smaller or equal to the positive integer of number of elements in each code word, i and k are different.

8, frame synchronization as claimed in claim 6 and obtain the method for cell group information, it is characterized in that, described arrangement of elements rule is: the product of the transposed matrix of the code word of n slot transmission and the arrangement that sets in advance is identical with the transposed matrix of the code word of n+1 slot transmission;

The Nth power of described permutation matrix is a unit matrix, and the n power of permutation matrix is not equal to unit matrix;

Wherein, n is more than or equal to 1 and less than the positive integer of N.

9, frame synchronization as claimed in claim 6 and obtain the method for cell group information is characterized in that described transmit leg sends to the recipient with code word and is: use different antennas to transmit at different time-gap, and same time slot only uses an antenna.

10, frame synchronization as claimed in claim 6 and obtain the method for cell group information is characterized in that described transmit leg sends to the recipient with code word and is: use different antennas to transmit respectively at a time slot.

11, as claim 9 or 10 described frame synchronization with obtain the method for cell group information, it is characterized in that a described antenna is: physical antenna or by the fixing virtual-antenna that obtains of precoding vectors matrix or precoding vectors switched diversity.

12, frame synchronization as claimed in claim 6 and obtain the method for cell group information, it is characterized in that, described recipient detects the code word that receives: the element in the code word that n time slot received, respectively with N * G the code word that is provided with in element carry out correlation computations, the described code word that obtains and the correlation of N * G code word, with the described correlation that obtains as testing result.

13, frame synchronization as claimed in claim 12 and obtain the method for cell group information, it is characterized in that, described according to testing result and the arrangement of elements rule that sets in advance, the continuous code word that receives is carried out diversity to be merged into: according to the arrangement of elements rule that sets in advance, the correlation that relevant position element in the code word of n slot transmission calculate is obtained, the correlation corresponding with the element of relevant position in the continuous code word of this code word merges.

14, frame synchronization as claimed in claim 12 and obtain the method for cell group information, it is characterized in that, described code word after diversity is merged and identical N * G the code word with transmit leg that sets in advance compare and are employing maximum likelihood mode, a highest pairing code word of numerical value in all correlations that merging is obtained is defined as the described code word that receives.

15, a kind of frame synchronization and obtain the method for cell group information is characterized in that, may further comprise the steps:

Arrangement of elements rule according to setting in advance is provided with at least one set of code words, and each code word in every group comprises identical element but have different arrangement of elements orders, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Transmit leg is selected one group and is sent to the recipient from described at least one set of code words;

The recipient detects the code word that receives, and at least one set of code words of testing result and described setting is compared, and determines the actual value of testing result, obtains the information of frame synchronization information and cell set.

16, the system that a kind of achieve frame is synchronous and cell information obtains is characterized in that, comprising: transmit leg and recipient, wherein,

Described transmit leg is used to store at least one set of code words, and each code word in every group comprises identical element but have different arrangement of elements orders, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality; From at least one set of code words of storage, select one group and send to described recipient;

Described recipient is used for storing at least one set of code words identical with described transmit leg and the arrangement of elements rule of described code word; The code word that receives is detected, and according to the arrangement of elements rule of testing result and storage, the code word that receives is continuously carried out diversity to be merged, code word after the diversity merging and at least one set of code words of storage are compared, determine the actual value of element in the code word after diversity merges, obtain the information of frame synchronization information and cell set.

17, system as claimed in claim 16 is characterized in that, described transmit leg comprises: code word memory cell, main control unit and signal transmitter unit, wherein,

Described code word memory cell, be used to store at least one set of code words of the storage that sets in advance, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality; At least one set of code words of storage is offered main control unit;

Described main control unit is used for selecting one group from least one set of code words of code word cell stores and offers the signal transmitter unit;

Described signal transmitter unit is used for the code word from the master control unit is sent to the recipient.

18, system as claimed in claim 17 is characterized in that, described transmit leg further comprises: more than an antenna;

Described signal transmitter unit is further used at each time slot by an antenna transmission, at different time-gap by different antenna transmission; Perhaps, a plurality of elements in the code word behind the described coding are sent by different antennae at each time slot.

19, system as claimed in claim 16 is characterized in that, described recipient comprises: decoded information unit, signal receiving unit, diversity merge cells and decoding arithmetic element, wherein,

Described decoded information unit is used for storing at least one set of code words identical with encoding device and arrangement of elements rule; At least one set of code words of storage is offered the decoding arithmetic element; The arrangement of elements rule of storage is offered diversity merge cells and decoding arithmetic element;

Described signal receiving unit is used to receive the code word on the secondary synchronization channel S-SCH subcarrier, and offers described diversity merge cells;

Described diversity merge cells is used for the code word that receives is detected, and according to the arrangement of elements rule that testing result and decoding information unit provide, the continuous code word that receives is carried out diversity merge; Code word after the diversity merging is offered the decoding arithmetic element;

Described decoding arithmetic element, at least one set of code words that code word after the diversity that is used for that the diversity merge cells is provided merges and decoded information unit provide compares, and determines the actual value of element in the code word after diversity merges; According to the arrangement of elements rule and the code word of having determined the actual value of element of storage, obtain the information of frame synchronization information and cell set.

20, system as claimed in claim 16 is characterized in that, this system further comprises encoding device, is used for the storage element queueing discipline and includes the element set of a plurality of elements with at least one; According to the arrangement of elements rule that sets in advance described at least one group element group is encoded, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders; The described at least one set of code words that obtains is offered described transmit leg and recipient.

21, system as claimed in claim 20 is characterized in that, described encoding device comprises: element information unit and coding arithmetic element, wherein,

Described element information unit is used for the storage element queueing discipline and at least one includes the element set of a plurality of elements; Arrangement of elements rule and at least one element set of storage are offered described coding arithmetic element;

Described coding arithmetic element, be used for described at least one group element group being encoded according to the arrangement of elements rule that sets in advance, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders; At least one set of code words that obtains is offered described transmit leg and recipient.

22, the coding method in a kind of Cell searching is characterized in that, may further comprise the steps:

The element set that at least one includes a plurality of elements is set;

According to the arrangement of elements rule that sets in advance the element set of described setting is encoded, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders.

23, coding method as claimed in claim 22 is characterized in that, establishing the cell set number is G, and described at least one element set that is provided with is: according to the number of cell set, set G the element set corresponding with the information of each cell set respectively; Wherein, G is a positive integer.

24, coding method as claimed in claim 23 is characterized in that, the information of described cell set is cell set identify label ID.

25, coding method as claimed in claim 22 is characterized in that, the respectively corresponding mutually different sequence of each element in the described element set.

As any described coding method in the claim 23 to 25, it is characterized in that 26, the code word number of establishing in every group is N, N is a positive integer, and N code word in described every set of code words is respectively applied for N slot transmission in a radio frames;

Describedly according to the arrangement of elements rule that sets in advance G the element set that is provided with is encoded to: the code word of n+1 slot transmission of N time slot rearranges acquisition by the code word of n slot transmission according to the arrangement of elements rule;

Wherein, n is more than or equal to 1 and less than the positive integer of N.

27, coding method as claimed in claim 26, it is characterized in that, described arrangement of elements rule is: k element in the code word of n slot transmission, identical with i element in the code word of n+1 slot transmission, and k element in the code word of i element in the code word of n slot transmission and n+1 slot transmission is identical;

I and k are more than or equal to 1 and smaller or equal to the positive integer of number of elements in each code word, i and k are different.

28, coding method as claimed in claim 26 is characterized in that, described arrangement of elements rule is: the product of the transposed matrix of the code word of n slot transmission and the arrangement that sets in advance is identical with the transposed matrix of the code word of n+1 slot transmission;

The Nth power of described permutation matrix is a unit matrix, and the n power of permutation matrix is not equal to unit matrix;

Wherein, n is more than or equal to 1 and less than the positive integer of N.

29, coding method as claimed in claim 26 is characterized in that, the described code word that is used for the 1st slot transmission is to determine according to the criterion of the minimum range between each code word of maximization.

30, a kind of encoding device that is used for Cell searching is characterized in that, comprising: element information unit and coding arithmetic element, wherein,

Described element information unit is used for the storage element queueing discipline and at least one includes the element set of a plurality of elements; Arrangement of elements rule and at least one element set of storage are offered described coding arithmetic element;

Described coding arithmetic element, be used for described at least one group element group being encoded according to the arrangement of elements rule that sets in advance, all coding results of each element set are formed a set of code words, and each code word in every group comprises identical element but has different arrangement of elements orders.

31, the coding/decoding method in a kind of Cell searching is characterized in that, may further comprise the steps:

According to the arrangement of elements rule that sets in advance at least one set of code words identical with transmit leg is set, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Comprise that with code word described setting the code word of identical element number detects to that receive, and according to testing result and set in advance the arrangement of elements rule, the code word that receives is continuously carried out diversity to be merged, code word after the diversity merging and at least one set of code words of setting are compared, determine the actual value of element in the code word after diversity merges, obtain the information of frame synchronization information and cell set.

32, coding/decoding method as claimed in claim 31, it is characterized in that, if the code word number in every group is N, N is a positive integer, the described code word that receives is detected is: the element in the code word that n time slot received, respectively with at least one set of code words that is provided with in element carry out correlation computations, the described code word that obtains and the correlation of described at least one set of code words, with the correlation that obtains as testing result.

33, coding/decoding method as claimed in claim 32, it is characterized in that, described according to testing result and the arrangement of elements rule that sets in advance, the continuous code word that receives is carried out diversity to be merged into: according to the arrangement of elements rule that sets in advance, the correlation that relevant position element in the code word of n slot transmission calculate is obtained, with the continuous code word of this code word in the relevant position element calculate the correlation that obtains and merge.

34, coding/decoding method as claimed in claim 32, it is characterized in that, described code word after diversity is merged and identical N * G the code word with transmit leg that sets in advance compare and are employing maximum likelihood mode, a highest pairing code word of numerical value in all correlations that merging is obtained is defined as the described code word that receives.

35, the coding/decoding method in a kind of Cell searching is characterized in that, may further comprise the steps:

According to the arrangement of elements rule that sets in advance at least one set of code words identical with transmit leg is set, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality;

Comprise that with code word described setting the code word of identical element number detects to that receive, and at least one set of code words of testing result and setting is compared, determine the actual value of testing result, obtain the information of frame synchronization information and cell set.

36, a kind of decoding device that is used for Cell searching is characterized in that, comprising: decoded information unit, diversity merge cells and decoding arithmetic element, wherein,

Described decoded information unit, be used for storing arrangement of elements rule and at least one set of code words identical with the code word transmit leg, each code word in every group comprises identical element but has different arrangement of elements order, the element that the element that comprises in every set of code words and other set of code words comprise have at least one inequality; At least one set of code words of storage is offered the decoding arithmetic element; The arrangement of elements rule of storage is offered diversity merge cells and decoding arithmetic element;

Described diversity merge cells is used for comprising that with code word described storage the code word of equal number element detects to that receive, and according to the arrangement of elements rule that testing result and decoding information unit provide, the code word that receives is continuously carried out diversity merge; Code word after the diversity merging is offered the decoding arithmetic element;

Described decoding arithmetic element, at least one set of code words that code word after the diversity that is used for that the diversity merge cells is provided merges and decoded information unit provide compares, determine the actual value of element in the code word after diversity merges, according to the arrangement of elements rule of storage, obtain the information of frame synchronization information and cell set.

37, decoding device as claimed in claim 36 is characterized in that, this equipment further comprises: signal receiving unit is used to receive the code word on the secondary synchronization channel S-SCH subcarrier, and offers described diversity merge cells.

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