CN101635580A - Method and device for confirming synchronous sequence codes of cell and positions of codes - Google Patents

Method and device for confirming synchronous sequence codes of cell and positions of codes Download PDF

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CN101635580A
CN101635580A CN200810132170A CN200810132170A CN101635580A CN 101635580 A CN101635580 A CN 101635580A CN 200810132170 A CN200810132170 A CN 200810132170A CN 200810132170 A CN200810132170 A CN 200810132170A CN 101635580 A CN101635580 A CN 101635580A
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sync
sign indicating
indicating number
power
related power
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李旭
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ZTE Corp
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ZTE Corp
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Priority to CN200810132170A priority Critical patent/CN101635580A/en
Priority to PCT/CN2009/072857 priority patent/WO2010009670A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
    • H04B1/70775—Multi-dwell schemes, i.e. multiple accumulation times

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method for confirming a synchronous sequence code of a cell and a position of the code. The method comprises the following steps: firstly, performing relative coarse search for haploid sampling complete frames to obtain approximate positions of a plurality of DwPts; and then, performing precision search for diploid or quadruple sampling on the positions so as to obtain the accurate SYNC_DL position of the SYNC_DL code. The invention also discloses a device for confirming the synchronous sequence code of the cell and the position of the code. The device confirms the SYNC_DL code used by the prior cell and the position of the SYNC_DL code through a sampling module, a relative operation module and a comparing module. Adopting the method of the invention, the computation required by confirming the SYNC_DL code and the position of the code is reduced and the reliability is guaranteed at the same time.

Description

A kind ofly confirm the synchronous sequence codes of sub-district and the method and the device of this code position
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of confirm synchronizing sequence (SYNC_DL) sign indicating number of sub-district and the method and the device of this code position.
Background technology
Must search a proper cell as early as possible after user terminal (UE) start, obtain the service that could use network after the information of more detailed information in this sub-district or adjacent cell then, this search proper cell and the procedure definition of obtaining cell information are cell initial searching process.Usually TD-SCDMA system cell initial ranging process mainly comprises: cell downlink is led the SYNC_DL sign indicating number of engaging time slot (DwPts) and the affirmation of position thereof, the affirmation of the training sequence of TS0 (midamble) sign indicating number and the identification of scrambler, and read broadcast system message (BCH).
Wherein, the SYNC_DL sign indicating number of sub-district DwPts and the affirmation of position thereof, the method that generally adopts has two kinds at present: a kind of is the method that adopts total correlation, confirms the SYNC_DL sign indicating number of current area DwPts and the exact position of this yard; Another kind is to be divided into coarse search and smart two steps of search, coarse search adopts the method for energy window search to find the approximate location of DwPts, smart search is to carry out related operation in the approximate location of the resulting DwPts of coarse search, confirms the SYNC_DL sign indicating number of current area DwPts and the exact position of this yard.The former is higher for reliability, need carry out two times or four samplings to received signal, and to the whole frame related operation of the data of sampling gained, operand is too big, cause spent hardware resource big, and operation time is many; Though latter's operand is less, required operation time is less, and coarse search adopts the energy window search, and to compare reliability relatively poor with the total correlation computing.And how to reduce operand, and can guarantee reliability again simultaneously, be one of the key issue that how to reduce the TD-SCDMA system cell initial ranging time and guarantee the reliability of search.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of the confirm synchronous sequence codes of sub-district and the method and the device of this code position, has reduced and has confirmed SYNC_DL sign indicating number and the required operand of this code position to have guaranteed reliability simultaneously again.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of confirming synchronous sequence codes and this code position of sub-district, this method may further comprise the steps:
Carry out single-time sampling to received signal, and single doubly make relevantly one by one, obtain the related power of each SYNC_DL sign indicating number of the data block of the gained of sampling and each synchronizing sequence SYNC_DL sign indicating number; Described related power and threshold values are compared, draw the descending approximate location of engaging time slot DwPts of leading according to comparative result;
Carry out two times or four samplings in the approximate location of described each DwPts respectively, the approximate location of each described DwPts obtains a sampled data piece; Make relevantly of each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number; According to second related power of described each SYNC_DL sign indicating number, determine the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number.
Further, it is relevant that described data block with the single-time sampling gained and each SYNC_DL sign indicating number are done one by one, and the related power that obtains each SYNC_DL sign indicating number comprises:
The data block of a1, the gained of will sampling is divided into N subframe, and 32 SYNC_DL sign indicating numbers are divided into N SYNC_DL code character, makes subframe corresponding one by one with the SYNC_DL code character;
B1, with each the SYNC_DL sign indicating number input correlator in subframe and the corresponding SYNC_DL code character, make relevantly one by one of subframe and each the SYNC_DL sign indicating number in the pairing SYNC_DL code character, obtain the related power of each SYNC_DL sign indicating number respectively;
C1, repeating step b1 are up to the related power that obtains 32 SYNC_DL sign indicating numbers.
Further, described with described related power and threshold values comparison, the approximate location that draws DwPts according to comparative result comprises:
The related power of 32 SYNC_DL sign indicating numbers all is divided into M power section,, gets the maximal correlation power of each section respectively to the related power ordering of each power section; And by the maximal correlation power of finding out in each maximal correlation power greater than threshold values, then the position of the data of the power section correspondence at each described maximal correlation power place greater than threshold values is the approximate location of DwPts.
Further, it is relevant that each sampled data piece of described usefulness and corresponding SYNC_DL sign indicating number are done, and second related power that draws each SYNC_DL sign indicating number comprises:
A2, SYNC_DL sign indicating number that the sampled data piece is corresponding with this sampled data piece input correlator are made relevantly of the corresponding SYNC_DL sign indicating number of sampled data piece and this sampled data piece, draw second related power of this SYNC_DL sign indicating number;
B2, repeating step a2 are up to second related power that draws the pairing SYNC_DL sign indicating number of all sampled data pieces.
Further, described second related power according to described each SYNC_DL sign indicating number, determine that the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number comprise:
Second related power ordering to all SYNC_DL sign indicating numbers, obtain maximum second related power, and determine that this maximum second related power is greater than the essence gate limit value, SYNC_DL sign indicating number that then should the maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, and the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number.
The present invention also provides a kind of the confirm synchronous sequence codes of sub-district and the device of this code position, and this device comprises:
Sampling module is used for carrying out to received signal single-time sampling; And be used for carrying out two times or four samplings in the approximate location of each DwPts, the approximate location of each described DwPts obtains a sampled data piece;
The related operation module is used for making one by one of the data block of single-time sampling gained and 32 SYNC_DL sign indicating numbers relevant, obtains the related power of each SYNC_DL sign indicating number; And be used for making relevant of described each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number;
Comparison module is used for described related power and threshold values are compared, and draws the approximate location of DwPts according to comparative result; And be used for second related power according to described each SYNC_DL sign indicating number, determine the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number.
Further, described sampling module comprises:
Thick sampling module is used for carrying out to received signal single-time sampling; Be used for the data of sampling gained are divided into N subframe, and be used for 32 SYNC_DL sign indicating numbers are divided into N SYNC_DL code character;
Wonderful original mold piece is used for carrying out two times or four samplings in the approximate location of each DwPts, and the approximate location of each described DwPts obtains a sampled data piece.
Further, described comparison module comprises:
Thick comparison module all is divided into M power section with the related power of 32 SYNC_DL sign indicating numbers, and the related power to each power section sorts respectively, gets the maximal correlation power of each section; And be used for finding out maximal correlation power greater than threshold values by each maximal correlation power, with each position greater than the data of the power section correspondence at the described maximal correlation power place of threshold values, and each sends described wonderful original mold piece to greater than the pairing SYNC_DL sign indicating number of the maximal correlation power of threshold values;
Smart comparison module, be used for second related power ordering to all SYNC_DL sign indicating numbers, get maximum second related power, and be used for determining that this maximum second related power is greater than the essence gate limit value, SYNC_DL sign indicating number that then should the maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, and the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number.
The synchronous sequence codes of affirmation provided by the present invention sub-district and the method and the device of this code position, carry out the relevant coarse search of the whole frame of single-time sampling earlier, obtain the approximate location of one or more DwPts, on these positions, carry out the essence search of two times or four samplings again, thereby obtain the position of the SYNC_DL sign indicating number of accurate SYNC_DL sign indicating number, have to have reduced and confirm SYNC_DL sign indicating number and the required operand of this code position, guaranteed the advantage of reliability simultaneously again; The present invention also has following advantage and characteristics:
It is relevant with calculation that coarse search and smart search are all adopted, can shared correlator during realization, saved hardware resource.
Description of drawings
Fig. 1 confirms the realization flow figure of the method for the synchronous sequence codes of sub-district and this code position for the present invention;
Fig. 2 is the structural representation of the correlator of the present invention's employing;
Fig. 3 confirms the structural representation of the device of the synchronous sequence codes of sub-district and this code position for the present invention.
Embodiment
The present invention confirm the synchronous sequence codes of sub-district and this code position method realization flow as shown in Figure 1, this method may further comprise the steps:
Step 101: carry out single-time sampling to received signal, and make relevantly of data block and 32 SYNC_DL sign indicating numbers of sampling gained one by one, obtain the related power of each SYNC_DL sign indicating number;
Concrete correlation technique comprises:
The data block of a, the gained of will sampling is divided into N subframe, and 32 SYNC_DL sign indicating numbers are divided into N SYNC_DL code character, makes subframe corresponding one by one with the SYNC_DL code character;
B, with each the SYNC_DL sign indicating number input correlator in subframe and the corresponding SYNC_DL code character, make relevantly one by one of subframe and each the SYNC_DL sign indicating number in the pairing SYNC_DL code character, obtain the related power of each SYNC_DL sign indicating number respectively; The related operation of each the SYNC_DL sign indicating number in described subframe and the pairing SYNC_DL code character is finished by correlator;
C, repeating step b obtain the related power of 32 SYNC_DL sign indicating numbers.
Wherein, N 〉=1; When N=1, subframe comprises 6464 chips (chip), and each SYNC_DL sign indicating number correspondence obtains 6400 related powers, is divided into 50 sections, finds maximal correlation power from every section 128 related powers; In order to reduce the spent hardware resource of related operation, can increase the value of N, when N gets 8, corresponding 32/8 the SYNC_DL sign indicating number of subframe; In order to save computing time, 4 groups of parallel correlators can also be set carry out related operation simultaneously, make when relevant of a subframe and each the SYNC_DL sign indicating number in the pairing SYNC_DL code character, in every group of correlator, import this subframe, and a SYNC_DL sign indicating number in the corresponding SYNC_DL code character.
Described correlator is finished in the related operation of SYNC_DL sign indicating number of the associated window of a 128chip and one 64 (bit), and the related power of SYNC_DL sign indicating number is expressed as:
CorrSync ( n , k ) = Σ l = 0 63 r ( k + l ) * conj ( sync ( n , l ) × j l )
Wherein, r is the data segment of subframe; K=0～W-64, W are correlation window length, are 128 at this; N is the SYNC_DL sign indicating number, n=0, and 1 ..., 31; L is the bit of SYNC_DL sign indicating number, is 64 at this.
For accelerating arithmetic speed, described correlator adopts the structure of 16 level production lines, as shown in Figure 2.
Step 102: described related power and thick threshold value are compared, draw the approximate location of DwPts according to comparative result;
Get maximum in absolute thresholding (AbsTH), relative threshold (RelTH), the average thresholding (AvgTH) as described thick threshold value;
Wherein, AbsTH is 0; The described related power of RelTH=maximum * maximum rate value (MaxRatio) is recommended to get 0; The mean value of all described related powers of AvgTH=* average ratio value (AvgRatio) is recommended to get 0;
The method that specifically draws the approximate location of DwPts comprises:
The related power of 32 SYNC_DL sign indicating numbers all is divided into M power section,, gets the maximal correlation power of each section respectively to the related power ordering of each power section; And by the maximal correlation power of finding out in each maximal correlation power greater than threshold values, then the position of the data of the power section correspondence at each described maximal correlation power place greater than threshold values is the approximate location of DwPts.
Step 103: carry out two times or four samplings in the approximate location of described each DwPts respectively, the approximate location of each described DwPts obtains a sampled data piece.
Step 104: make relevantly of each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number; The SYNC_DL sign indicating number of described sampled data piece correspondence is the SYNC_DL sign indicating number under the maximal correlation power of the approximate location correspondence of DwPts;
The method that specifically draws second related power of each SYNC_DL sign indicating number comprises:
A1, the SYNC_DL sign indicating number that the sampled data piece is corresponding with this sampled data piece are imported correlator; Make relevantly of the corresponding SYNC_DL sign indicating number of sampled data piece and this sampled data piece, draw second related power of this SYNC_DL sign indicating number;
B1, repeating step a1 are up to second related power that draws the pairing SYNC_DL sign indicating number of all sampled data pieces.
Step 105:, determine the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number according to second related power of described each SYNC_DL sign indicating number;
Concrete definite method comprises:
To the ordering of second related power of all SYNC_DL sign indicating numbers, obtain maximum second related power, and relatively should maximum second related power whether greater than described essence gate limit value, if greater than; SYNC_DL sign indicating number that then should the maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, and the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number, process ends; Otherwise, continue to receive described received signal, and return step 101;
Get maximum in absolute thresholding (AbsTH), relative threshold (RelTH), the average thresholding (AvgTH) as described essence gate limit value;
Wherein, AbsTH is 0; Described maximum second related power of RelTH=* maximum rate value (MaxRatio) is recommended to get 0; The mean value of all described second related powers of AvgTH=* average ratio value (AvgRatio) is recommended to get 0.
Step 101,102 has been carried out the relevant coarse search of the whole frame of single-time sampling, obtains the approximate location of one or more DwPts, and the coarse search operand that the whole frame of single-time sampling is relevant is less, and the reliability height; Step 103～105 are smart search.
The present invention confirm the synchronous sequence codes of sub-district and this code position device structure as shown in Figure 3, this device comprises:
Sampling module is used for carrying out to received signal single-time sampling, and is used for carrying out two times or four samplings in the approximate location of each DwPts, and the approximate location of each described DwPts obtains a sampled data piece;
The related operation module is used for making one by one of the data block of single-time sampling gained and 32 SYNC_DL sign indicating numbers relevant, obtains the related power of each SYNC_DL sign indicating number; And be used for making relevant of described each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number; Described related operation module is realized by correlator;
Comparison module is used for described related power and threshold values are compared, and draws the approximate location of DwPts according to comparative result; And be used for second related power according to described each SYNC_DL sign indicating number, determine the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number; Described comparison module is realized by Digital Signal Processing (DSP) software.
Described sampling module comprises:
Thick sampling module is used for carrying out to received signal single-time sampling; Be used for the data of sampling gained are divided into N subframe, and be used for 32 SYNC_DL sign indicating numbers are divided into N SYNC_DL code character;
Wonderful original mold piece is used for carrying out two times or four samplings in the approximate location of each DwPts, and the approximate location of each described DwPts obtains a sampled data piece.
Described comparison module comprises:
Thick comparison module all is divided into M power section with the related power of 32 SYNC_DL sign indicating numbers, and the related power to each power section sorts respectively, gets the maximal correlation power of each section; And be used for finding out maximal correlation power greater than threshold values by each maximal correlation power, with each position greater than the data of the power section correspondence at the described maximal correlation power place of threshold values, and each sends described wonderful original mold piece to greater than the pairing SYNC_DL sign indicating number of the maximal correlation power of threshold values;
Smart comparison module, be used for second related power ordering to all SYNC_DL sign indicating numbers, get maximum second related power, and be used for determining that this maximum second related power is greater than the essence gate limit value, SYNC_DL sign indicating number that then should the maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, and the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number.
After the UE start, confirm that the synchronous sequence codes of sub-district and the process of this code position comprise:
Enable described thick sampling module, carry out single-time sampling to received signal, and the data of single-time sampling gained are sent to described related operation module; The related operation module is made relevant one by one of the data of single-time sampling gained and 32 SYNC_DL sign indicating numbers, obtain the related power of each SYNC_DL sign indicating number, and the related power of described each SYNC_DL sign indicating number is sent to thick comparison module; Thick comparison module draws the approximate location of DwPts and sends described wonderful original mold piece to after relatively, finishes coarse search; Wonderful original mold piece is captured in the approximate location of each DwPts and carries out two times or four samplings, obtains a plurality of sampled data pieces and sends described related operation module to; The related operation module is made relevant of each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number and send smart comparison module to; Smart comparison module is to second related power ordering of all SYNC_DL sign indicating numbers, and get maximum second related power greater than the essence gate limit value, the SYNC_DL sign indicating number of this maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number, finishes smart search.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (8)

1, a kind of method of confirming synchronous sequence codes and this code position of sub-district is characterized in that this method may further comprise the steps:
Carry out single-time sampling to received signal, and single doubly make relevantly one by one, obtain the related power of each SYNC_DL sign indicating number of the data block of the gained of sampling and each synchronizing sequence SYNC_DL sign indicating number; Described related power and threshold values are compared, draw the descending approximate location of engaging time slot DwPts of leading according to comparative result;
Carry out two times or four samplings in the approximate location of described each DwPts respectively, the approximate location of each described DwPts obtains a sampled data piece; Make relevantly of each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number; According to second related power of described each SYNC_DL sign indicating number, determine the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number.
According to the synchronous sequence codes of the described affirmation of claim 1 sub-district and the method for this code position, it is characterized in that 2, it is relevant that described data block with the single-time sampling gained and each SYNC_DL sign indicating number are done one by one, the related power that obtains each SYNC_DL sign indicating number comprises:
The data block of a1, the gained of will sampling is divided into N subframe, and 32 SYNC_DL sign indicating numbers are divided into N SYNC_DL code character, makes subframe corresponding one by one with the SYNC_DL code character;
B1, with each the SYNC_DL sign indicating number input correlator in subframe and the corresponding SYNC_DL code character, make relevantly one by one of subframe and each the SYNC_DL sign indicating number in the pairing SYNC_DL code character, obtain the related power of each SYNC_DL sign indicating number respectively;
C1, repeating step b1 are up to the related power that obtains 32 SYNC_DL sign indicating numbers.
According to the synchronous sequence codes of the described affirmation of claim 1 sub-district and the method for this code position, it is characterized in that 3, described with described related power and threshold values comparison, the approximate location that draws DwPts according to comparative result comprises:
The related power of 32 SYNC_DL sign indicating numbers all is divided into M power section,, gets the maximal correlation power of each section respectively to the related power ordering of each power section; And by the maximal correlation power of finding out in each maximal correlation power greater than threshold values, then the position of the data of the power section correspondence at each described maximal correlation power place greater than threshold values is the approximate location of DwPts.
According to the synchronous sequence codes of the described affirmation of claim 1 sub-district and the method for this code position, it is characterized in that 4, it is relevant that each sampled data piece of described usefulness and corresponding SYNC_DL sign indicating number are done, second related power that draws each SYNC_DL sign indicating number comprises:
A2, SYNC_DL sign indicating number that the sampled data piece is corresponding with this sampled data piece input correlator are made relevantly of the corresponding SYNC_DL sign indicating number of sampled data piece and this sampled data piece, draw second related power of this SYNC_DL sign indicating number;
B2, repeating step a2 are up to second related power that draws the pairing SYNC_DL sign indicating number of all sampled data pieces.
According to the synchronous sequence codes of the described affirmation of claim 1 sub-district and the method for this code position, it is characterized in that 5, described second related power according to described each SYNC_DL sign indicating number determines that the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number comprise:
Second related power ordering to all SYNC_DL sign indicating numbers, obtain maximum second related power, and determine that this maximum second related power is greater than the essence gate limit value, SYNC_DL sign indicating number that then should the maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, and the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number.
6, a kind ofly confirm the synchronous sequence codes of sub-district and the device of this code position, it is characterized in that this device comprises:
Sampling module is used for carrying out to received signal single-time sampling; And be used for carrying out two times or four samplings in the approximate location of each DwPts, the approximate location of each described DwPts obtains a sampled data piece;
The related operation module is used for making one by one of the data block of single-time sampling gained and 32 SYNC_DL sign indicating numbers relevant, obtains the related power of each SYNC_DL sign indicating number; And be used for making relevant of described each sampled data piece and corresponding SYNC_DL sign indicating number, draw second related power of each SYNC_DL sign indicating number;
Comparison module is used for described related power and threshold values are compared, and draws the approximate location of DwPts according to comparative result; And be used for second related power according to described each SYNC_DL sign indicating number, determine the SYNC_DL sign indicating number that current area is used and the position of this SYNC_DL sign indicating number.
7, according to the synchronous sequence codes of the described affirmation of claim 6 sub-district and the device of this code position, it is characterized in that described sampling module comprises:
Thick sampling module is used for carrying out to received signal single-time sampling; Be used for the data of sampling gained are divided into N subframe, and be used for 32 SYNC_DL sign indicating numbers are divided into N SYNC_DL code character;
Wonderful original mold piece is used for carrying out two times or four samplings in the approximate location of each DwPts, and the approximate location of each described DwPts obtains a sampled data piece.
8, according to the synchronous sequence codes of the described affirmation of claim 6 sub-district and the device of this code position, it is characterized in that described comparison module comprises:
Thick comparison module all is divided into M power section with the related power of 32 SYNC_DL sign indicating numbers, and the related power to each power section sorts respectively, gets the maximal correlation power of each section; And be used for finding out maximal correlation power greater than threshold values by each maximal correlation power, with each position greater than the data of the power section correspondence at the described maximal correlation power place of threshold values, and each sends described wonderful original mold piece to greater than the pairing SYNC_DL sign indicating number of the maximal correlation power of threshold values;
Smart comparison module, be used for second related power ordering to all SYNC_DL sign indicating numbers, get maximum second related power, and be used for determining that this maximum second related power is greater than the essence gate limit value, SYNC_DL sign indicating number that then should the maximum second related power correspondence is the used SYNC_DL sign indicating number of current area, and the position of the data of this maximum second related power correspondence is the position of SYNC_DL sign indicating number.
CN200810132170A 2008-07-21 2008-07-21 Method and device for confirming synchronous sequence codes of cell and positions of codes Pending CN101635580A (en)

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CN102281082A (en) * 2010-06-13 2011-12-14 中兴通讯股份有限公司 Downlink synchronization code confirmation method and device of single sampling data in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access)
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DE102004059957A1 (en) * 2004-12-13 2006-06-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Synchronization device and device for generating a synchronization signal
CN100377504C (en) * 2005-07-14 2008-03-26 凯明信息科技股份有限公司 First-step search of initial zone in time division synchronizing CDMA system
CN101174852B (en) * 2006-11-02 2012-07-11 中兴通讯股份有限公司 WCDMA subdistrict searching time slot synchronization method and system

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Publication number Priority date Publication date Assignee Title
CN102281082A (en) * 2010-06-13 2011-12-14 中兴通讯股份有限公司 Downlink synchronization code confirmation method and device of single sampling data in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access)
CN103546190A (en) * 2013-10-24 2014-01-29 大唐移动通信设备有限公司 Method for searching for downlink synchronous codes and user equipment
CN103546190B (en) * 2013-10-24 2016-01-27 大唐移动通信设备有限公司 A kind of method of searching downlink synchronous code and subscriber equipment

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