CN104093168A - LTE (Long Term Evolution) common-frequency adjacent region detection method and device - Google Patents

Abstract

The invention provides an LTE (Long Term Evolution) common-frequency adjacent region detection method and device. The method comprises the following steps: firstly, doing related detection on a received time-domain signal and a local main synchronizing signal to obtain a 5ms timing position; aiming at the 5ms timing position, obtaining a corresponding frequency domain auxiliary synchronizing signal; searching the auxiliary synchronizing signal; carrying out relation on a locally-generated auxiliary synchronizing signal by utilizing the obtained auxiliary synchronizing signal; judging a region with the greatest power according to a related first peak value and reconstructing the auxiliary synchronizing signal of the region and eliminating interferences; sequentially detecting until iteration is finished; and carrying out PBCH (Physical Broadcast Channel) decoding checking on a detected district and feeding a district ID (Identity) checked by a PBCH back to the auxiliary synchronizing signal and searching. With the adoption of the technical scheme of common-frequency region detection, the searching performance can be improved, and the false reporting and the leaked detection can be prevented.

Description

A kind of LTE homogeneous-frequency adjacent-domain detection method and device

Technical field

The present invention relates to wireless communication technology field, relate in particular to a kind of method and device detecting at LTE system same frequency adjacent area ID.

Background technology

In long evolving system (Long Term Evolution is called for short LTE) system, after starting up of terminal, first start initial ranging Serving cell so that resident.After mobile terminal successfully resides in some Serving cells, can carry out adjacent area search.LTE adopts identical networking mostly, in to the search of homogeneous-frequency adjacent-domain, between general community, can have certain difference power, causes power Qiang community to cause interference to power community on the weak side, affects the searching accuracy in small and weak district.Adopt the existing method in homogeneous-frequency adjacent-domain search, can only search power Qiang community and Partial Power Ruo community, and between community, exist mould 6 and mould 3 to disturb, cause existing certain false and undetected.

Summary of the invention

The object of the present invention is to provide a kind of LTE homogeneous-frequency adjacent-domain detection method and device, solve homogeneous-frequency adjacent-domain in prior art and detect false and undetected problem.

Technical scheme of the present invention is a kind of LTE homogeneous-frequency adjacent-domain detection method, comprises the following steps:

Step 1, receives time-domain sampling signal, obtains 5ms timing information;

Step 2, determines the time-domain position of auxiliary synchronous signals according to the position relationship of step 1 gained 5ms timing information and primary and secondary synchronization signals, obtain the auxiliary synchronous signals RxSSSInFd of frequency domain by Fourier transform;

Step 3, carries out auxiliary synchronous signals search, obtains alternative cell ID set A and frame head position;

Step 4, falls the community ID making a false report in the ID set A of alternative cell by PBCH checksum filter, obtain verification community ID set B afterwards, and described PBCH is Physical Broadcast Channel;

Step 5, this iteration of comparison performs step 4 gained community ID set B and last iteration performs step 4 gained community ID set B, returns to step 3 and adjusts auxiliary synchronous signals search according to comparative result.

And, perform step at 3 o'clock, carry out auxiliary synchronous signals search and comprise that basic search step is as follows,

Step 3.1, arranges iterations upper limit iter1, and making current iteration number of times r is 1;

Step 3.2, generates 504 * 2 corresponding frequency domain auxiliary synchronous signals LocalSSSInFd;

Step 3.3, carries out auxiliary synchronous signals related operation, and according to gained auxiliary synchronous signals correlation peak, power Qiang community ID is determined in search, obtains frame head position, reconstructed frequency domain auxiliary synchronous signals, and Bing Jianggai community ID deposits alternative cell ID set A in,

Search is according to the first peak value location positioning of related operation, and respective formula is as follows,

$\mathrm{id}=\arg \left(\max \left(\underset{i=0}{\overset{i=61}{\mathrm{\Σ}}}(\mathrm{RxSSSInFd}\left(i\right).*\mathrm{LoaclSSSInFd}(i,c,s))\right)\right),$

Wherein, id represents the community ID searching out according to auxiliary synchronous signals correlation peak, and RxSSSInFd (i) represents the frequency domain auxiliary synchronous signals receiving, LoaclSSSInFd (i, c, s) frequency domain auxiliary synchronous signals corresponding to c community of s field that represent to generate; The value of signaling point sequence number i is 0≤i≤61, and the value of community sequence number c is 0≤c≤503; Sign s={0,1}, represents respectively half frame number of subframe 0 and subframe 5;

Step 3.4 deducts step 3.3 reconstruct gained frequency domain auxiliary synchronous signals from the auxiliary synchronous signals RxSSSInFd of step 2 gained frequency domain, obtains disturbing the frequency domain auxiliary synchronous signals RxSSSInFd ' after eliminating;

Step 3.5, make current iteration number of times r=r+1, then judge whether r surpasses iter1, returning to if not step 3.4 redefines peak value and eliminates and disturb, until current iteration number of times surpasses the iterations upper limit iter1 arranging, iteration finishes, and exports final alternative cell ID set A and frame head position.

And in step 5, this iteration of comparison performs step 4 gained community ID set B and last iteration performs step after 4 gained community ID set B,

If comparative result is to have the community ID newly increasing, be back to step 3, and perform step at 3 o'clock at next iteration, front n the execution step 3.3 power Qiang community ID that search out are set to by force to this iteration and perform step 4 gained community ID set B;

If be relatively the community ID not newly increasing, be back to step 3, and perform step at 3 o'clock at next iteration, front n the execution step 3.3 power Qiang community ID that search out are set to by force to this iteration and perform step 4 gained community ID set B, in iter1 execution step of n+1～the, it within 3.3 o'clock, not the first peak value location positioning according to related operation, but all peak values are arranged from big to small, according to offset peak after the first peak value, determine.

And, in step 4, by PBCH checksum filter, falling the community ID making a false report in the ID set A of alternative cell comprises the following steps, step 4.1 is taken out Yi Ge community ID as working as pre-treatment community ID, according to the PBCH signal of continuous 4 frames of frame head position acquisition from the ID set A of alternative cell, carry out PBCH verification, if verification, by entering step 4.2, if verification is not passed through, directly enters step 4.3;

Step 4.2, will work as pre-treatment community ID and deposit community ID set B in, and PBCH signal corresponding to pre-treatment community ID worked as in reconstruct, and deducts reconstruction result from original PBCH signal, disturbs elimination;

Step 4.3, return to step 4.1, from the ID set A of alternative cell, take out next community ID as pre-treatment community ID, carry out PBCH verification and disturb after elimination, until all community ID in the ID set A of alternative cell are disposed, obtain the set of cells B by PBCH verification.

The present invention is corresponding a kind of LTE homogeneous-frequency adjacent-domain checkout gear that provides also, comprises with lower module:

Master sync signal position acquisition module, for receiving time-domain sampling signal, obtains 5ms timing information;

Auxiliary synchronous signals acquisition module, for determine the time-domain position of auxiliary synchronous signals according to the position relationship of master sync signal position acquisition module gained 5ms timing information and primary and secondary synchronization signals, obtains the auxiliary synchronous signals RxSSSInFd of frequency domain by Fourier transform; SSS search module, for carrying out auxiliary synchronous signals search, obtains alternative cell ID set A and frame head position;

Correction verification module, for fall the community ID that alternative cell ID set A is made a false report by PBCH checksum filter, obtains verification community ID set B afterwards, and described PBCH is Physical Broadcast Channel;

Relatively adjusting module, carry out verification gained community ID set B and last iteration execution verification gained community ID set B, and auxiliary synchronous signals search is next time carried out in adjustment according to comparative result order SSS search module for this iteration of twin check module.

And SSS search module carries out auxiliary synchronous signals search and comprises that basic search step is as follows,

Step 3.1, arranges iterations upper limit iter1, and making current iteration number of times r is 1;

Step 3.2, generates 504 * 2 corresponding frequency domain auxiliary synchronous signals LocalSSSInFd;

Step 3.3, carries out auxiliary synchronous signals related operation, and according to gained auxiliary synchronous signals correlation peak, power Qiang community ID is determined in search, obtains frame head position, reconstructed frequency domain auxiliary synchronous signals, and Bing Jianggai community ID deposits alternative cell ID set A in,

Search is according to the first peak value location positioning of related operation, and respective formula is as follows,

$\mathrm{id}=\arg \left(\max \left(\underset{i=0}{\overset{i=61}{\mathrm{\Σ}}}(\mathrm{RxSSSInFd}\left(i\right).*\mathrm{LoaclSSSInFd}(i,c,s))\right)\right),$

Wherein, id represents the community ID searching out according to auxiliary synchronous signals correlation peak, and RxSSSInFd (i) represents the frequency domain auxiliary synchronous signals receiving, LoaclSSSInFd (i, c, s) frequency domain auxiliary synchronous signals corresponding to c community of s field that represent to generate; The value of signaling point sequence number i is 0≤i≤61, and the value of community sequence number c is 0≤c≤503; Sign s={0,1}, represents respectively half frame number of subframe 0 and subframe 5;

Step 3.4 deducts step 3.3 reconstruct gained frequency domain auxiliary synchronous signals from the auxiliary synchronous signals RxSSSInFd of auxiliary synchronous signals acquisition module gained frequency domain, obtains disturbing the frequency domain auxiliary synchronous signals RxSSSInFd ' after eliminating;

Step 3.5, make current iteration number of times r=r+1, then judge whether r surpasses iter1, returning to if not step 3.4 redefines peak value and eliminates and disturb, until current iteration number of times surpasses the iterations upper limit iter1 arranging, iteration finishes, and exports final alternative cell ID set A and frame head position.

And relatively this iteration of adjusting module twin check module is carried out after verification gained community ID set B and last iteration execution verification gained community ID set B,

If comparative result is to have the community ID newly increasing, order SSS search module, when next iteration is carried out auxiliary synchronous signals search, is set to by force this iteration of correction verification module by front n the execution step 3.3 power Qiang community ID that search out and carries out verification gained community ID set B;

If be relatively the community ID not newly increasing, order SSS search module is when next iteration is carried out auxiliary synchronous signals search, front n the execution step 3.3 power Qiang community ID that search out are set to by force to this iteration of correction verification module and carry out verification gained community ID set B, in iter1 execution step of n+1～the, it within 3.3 o'clock, not the first peak value location positioning according to related operation, but all peak values are arranged from big to small, according to offset peak after the first peak value, determine.

And, correction verification module falls by PBCH checksum filter the community ID making a false report in the ID set A of alternative cell and comprises the following steps, step 4.1, from the ID set A of alternative cell, take out Yi Ge community ID as working as pre-treatment community ID, PBCH signal according to continuous 4 frames of frame head position acquisition, carries out PBCH verification, if verification is by entering step 4.2, if verification is not passed through, directly enter step 4.3;

Step 4.2, will work as pre-treatment community ID and deposit community ID set B in, and PBCH signal corresponding to pre-treatment community ID worked as in reconstruct, and deducts reconstruction result from original PBCH signal, disturbs elimination;

Step 4.3, return to step 4.1, from the ID set A of alternative cell, take out next community ID as pre-treatment community ID, carry out PBCH verification and disturb after elimination, until all community ID in the ID set A of alternative cell are disposed, obtain the set of cells B by PBCH verification.

The present invention, after receiving time-domain sampling signal, first obtains the timing of 5ms, and then obtains the auxiliary synchronous signals of frequency domain.Relevant to local continuous two field auxiliary synchronous signals according to original reception frequency domain auxiliary synchronous signals, by correlation peak detection, obtain frame originating point information, and obtain alternative community ID set A by iterative interference cancellation; Secondly by the cyclic redundancy check (CRC) of PBCH signal, filter the false in the ID of alternative cell, obtain the community ID set B by PBCH verification, finally by feedback, detect, by adjusting SSS search, upgrade the scope of alternative cell ID set A, the community ID by existence progressively detects, the Tong Pinxia community ID improving detects performance, reduces false and false dismissal probability.

Accompanying drawing explanation

Fig. 1 is the flow chart of the embodiment of the present invention;

Fig. 2 is the flow chart of embodiment of the present invention SSS search alternative cell ID set A.

Embodiment

In following a plurality of embodiment of the present invention, an embodiment provides a kind of LTE homogeneous-frequency adjacent-domain detection method, and an embodiment provides a kind of LTE homogeneous-frequency adjacent-domain checkout gear.Below in conjunction with drawings and Examples, describe technical solution of the present invention in detail.

In order to be that those skilled in the art person understands the technical scheme in the embodiment of the present invention better, and make the above-mentioned purpose of the embodiment of the present invention, feature and advantage can be more obvious and understandable, below in conjunction with accompanying drawing, technical scheme in the embodiment of the present invention done to further more detailed explanation.

Referring to Fig. 1, be the embodiment flow chart of a kind of LTE of the application homogeneous-frequency adjacent-domain detection method, detailed step is as follows:

Step 1: receive time-domain sampling signal, obtain 5ms timing information.Embodiment generates local master sync signal, adopts slip coherent detection, obtains main sync bit corresponding to relevant peak-peak place, obtains 5ms timing information.

Step 2: the auxiliary synchronous signals that obtains frequency domain.According to the position relationship of step 1 gained 5ms timing information (being the time-domain position of master sync signal) and primary and secondary synchronization signals, can determine the time-domain position of auxiliary synchronous signals, by Fourier transform, obtain the auxiliary synchronous signals RxSSSInFd of frequency domain, obtain frequency domain SSS, in this area, conventional SSS is called for short auxiliary synchronous signals.

Embodiment is according to the position of the fixed position Relation acquisition auxiliary synchronous signals between the corresponding primary and secondary synchronization signals of TDD/FDD pattern (time division duplex/Frequency Division Duplexing (FDD)), under FDD-LTE pattern, between master sync signal and auxiliary synchronous signals, differ an OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol, under TDD-LTE pattern, master sync signal and auxiliary synchronous signals differ three OFDM symbols.

According to LTE agreement, synchronizing signal is mapped on the middle 1.25MHz of frequency band.Time domain auxiliary synchronous signals is by being fourier transformed into frequency domain, and the information of extracting the middle 1.25M bandwidth of bandwidth can obtain the auxiliary synchronous signals of frequency domain.

Step 3:SSS search, obtains alternative cell ID set and frame head position.

SSS search is for auxiliary synchronous signals, to disturb to eliminate to detect to obtain alternative community ID set A and frame head position.Utilize 504 * 2 groups of auxiliary synchronous signals that obtain frequency domain auxiliary synchronous signals and local generation to carry out related calculation, according to the first relevant peak value, judge the strong community ID of power and obtain current demand signal to be in subframe 0 or subframe 5, then obtain frame head position in conjunction with 5ms timing information; Dui Qiang community ID does the auxiliary synchronous signals of its frequency domain of channel estimating reconstruct, then from the frequency domain auxiliary synchronous signals of original reception, deducts, and to eliminate the interference of strong community to small and weak district, iteration obtains the alternative cell ID set A of SSS search successively.

Referring to Fig. 2, embodiment carries out the iteration elimination search of frequency domain auxiliary synchronous signals, and basic process is as follows,

1) iterations upper limit iter1 is set, making current iteration number of times r is 1;

2) 504 * 2 corresponding frequency domain auxiliary synchronous signals LocalSSSInFd of local generation;

3) carry out SSS related operation, according to gained auxiliary synchronous signals correlation peak, search out power Qiang community ID, respective formula is as follows, $\mathrm{id}=\arg \left(\max \left(\underset{i=0}{\overset{i=61}{\mathrm{\Σ}}}(\mathrm{RxSSSInFd}\left(i\right).*\mathrm{LoaclSSSInFd}(i,c,s))\right)\right),$

Wherein, id represents the community ID searching out according to auxiliary synchronous signals correlation peak, and for depositing set A in .* represents dot product.The auxiliary synchronous signals length of LTE agreement regulation frequency domain is 62, and the value of signaling point sequence number i is 0≤i≤61; RxSSSInFd (i) represents the frequency domain auxiliary synchronous signals receiving, and LoaclSSSInFd (i, c, s) represents the local s field generating, c the frequency domain auxiliary synchronous signals that community is corresponding; LTE agreement regulation You504Ge community, the value of community sequence number c is 0≤c≤503; Sign s={0,1}, represents respectively half frame number of subframe 0 and subframe 5.

After correlation computations, there are 504 * 2 values, corresponding with each ID and half frame number, according to maximum peak value, just can determine community ID and half frame number, deposit this id in alternative cell ID set A.According to after the first peak value location positioning power Qiang community ID of related operation and half frame number, and then can obtain frame head position, reconstructed frequency domain auxiliary synchronous signals then, while specifically implementing, reconstruct realizes and can adopt prior art, and it will not go into details in the present invention.

4) by reconstruct Hou community ID frequency domain (3) reconstruct gained frequency domain auxiliary synchronous signals) from primary signal (being the auxiliary synchronous signals RxSSSInFd of step 2 gained frequency domain), deduct, obtain disturbing the frequency domain auxiliary synchronous signals RxSSSInFd ' after eliminating;

5) make current iteration number of times r=r+1, judge whether r surpasses iter1, return to 2 if not), repeat 2)～4) redefine peak value and eliminate and disturb, until current iteration number of times surpasses the iterations upper limit iter1 arranging, iteration finishes, and exports final alternative cell ID set A and frame head position.

Perform step for the first time at 3 o'clock, according to above basic procedure, obtain power Qiang community ID, during follow-up execution step 3, according to the comparative result of step 5, adjust.

Step 4:PBCH verification, falls by PBCH checksum filter the false community ID that auxiliary synchronous signals detects.Comprise according to the PBCH signal of continuous 4 frames of frame head position acquisition, by merging the reliability filtering of decoding verification alternative cell ID, make a false report, obtain verification community ID set B afterwards; PBCH is Physical Broadcast Channel.

Embodiment obtains by the community ID set B of PBCH verification: the PBCH signal that gets continuous 4 frames according to frame head positional information, to alternative cell, ID set A Zhong community ID carries out blind Detecting, PBCH merging reception decoding by continuous 4 frames judges that whether set A Zhong Ge community ID is make a false report and carry out filtering, can realize judgement according to existing calibration technology one by one.

During concrete enforcement, can adopt following flow process:

1) from the ID set A of alternative cell, take out Yi Ge community ID as working as pre-treatment community ID, the PBCH signal according to continuous 4 frames of frame head position acquisition, carries out PBCH verification, if verification is passed through, enters 2), if verification is not passed through, directly enter 3);

2) will work as pre-treatment community ID and deposit set B in, PBCH signal corresponding to pre-treatment community ID worked as in reconstruct, and deducts reconstruction result from original PBCH signal, with the PBCH eliminating as pre-treatment community ID, the PBCH of other communities ID caused to interference;

3) return to 1), from the ID set A of alternative cell, take out next community ID as processing as pre-treatment community ID, after community ID all in the ID set A of alternative cell is carried out successively the verification of PBCH and disturbs and to have eliminated, obtain the set of cells B by PBCH verification.

Step 5: feedback detects, relatively this iteration performs step 4 gained community ID set B and last iteration performs step 4 gained community ID set B, returns to step 3 and adjusts SSS search according to comparative result.

Embodiment adjusts according to twice content by the set of cells B of PBCH verification before and after comparing, and feedback detects two kinds of adjustment modes:

If relatively this performs step 4 gained set B and once performs step before relatively and find that there is the community ID newly increasing in 4 gained set B, so this set B is delivered in SSS search, be back to step 3, in upper once SSS search procedure, front n peak value judged to gained community ID is set to by force this set B Zhong community ID, wherein n is this set B Zhong community ID number, to guarantee the interference elimination of accurate auxiliary synchronous signals.Upper, once perform step 3, n execution 3 before in the ID set A of alternative cell) the power Qiang community ID searching out, by this, being performed step 4 gained set B Zhong community ID replaces, before elimination, after the interference of n community ID, remaining community ID judges according to the first peak value obtain constant.

If find the community ID not newly increasing relatively in twice set B, so this set B is delivered in SSS search, be back to step 3, in upper once SSS search procedure, front n peak value judged to gained community ID is set to by force this set B Zhong community ID, wherein n is this set B Zhong community ID number, to guarantee the interference elimination of accurate auxiliary synchronous signals.Before elimination after the interference of n community ID, remaining community ID adds that according to the first peak value skew offset judges, wherein offset is the accumulative frequency of newly-increased community ID (zero clearing restatement while having newly-increased community ID) of twice of front and back set B, until obtain alternative cell ID set A.Prevent thus due to auxiliary synchronous signals cross-correlation performance cause undetected.Remaining community ID adds that according to the first peak value skew offset judges, implementation is as follows,

Upper, once perform step 3, while iter1 execution 3 of inherent n+1～the of alternative cell ID set A) searching for power Qiang community ID, correlation peak corresponding to Jiang504Ge community sorts from big to small respectively, if k peak value is designated as pos (k) after sequence, the scope of k is [0,503], the first peak value is pos (0), will determine that power Qiang community ID changes into according to pos (0+offset) according to pos (0) and determine power Qiang community ID.

Corresponding with the embodiment of a kind of LTE of the present invention homogeneous-frequency adjacent-domain detection method, the present invention also provides the embodiment of a kind of LTE homogeneous-frequency adjacent-domain checkout gear.

This LTE homogeneous-frequency adjacent-domain checkout gear comprises with lower module:

Master sync signal position acquisition module, for receiving time-domain sampling signal, obtains 5ms timing information;

Auxiliary synchronous signals acquisition module, for determine the time-domain position of auxiliary synchronous signals according to the position relationship of master sync signal position acquisition module gained 5ms timing information and primary and secondary synchronization signals, obtains the auxiliary synchronous signals RxSSSInFd of frequency domain by Fourier transform; SSS search module, for carrying out auxiliary synchronous signals search, obtains alternative cell ID set A and frame head position;

Correction verification module, for fall the community ID that alternative cell ID set A is made a false report by PBCH checksum filter, obtains verification community ID set B afterwards, and described PBCH is Physical Broadcast Channel;

Relatively adjusting module, carry out verification gained community ID set B and last iteration execution verification gained community ID set B, and auxiliary synchronous signals search is next time carried out in adjustment according to comparative result order SSS search module for this iteration of twin check module.

Each module specific implementation is corresponding with each step, and it will not go into details in the present invention.

During concrete enforcement, those skilled in the art can adopt other Module Division modes, for example, reconstructed module is set and is specifically designed to reconstruct auxiliary synchronous signals and PBCH signal, still in protection range of the present invention.

Those skilled in the art can very clearly recognize that the technology in the embodiment of the present invention can add essential general hardware platform by software and realize.Protection scope of the present invention is not limited to this example for this reason, but meets the maximum magnitude of the character of innovation of claims.

Claims (8)

1. a LTE homogeneous-frequency adjacent-domain detection method, is characterized in that, comprises the following steps:

Step 1, receives time-domain sampling signal, obtains 5ms timing information;

Step 2, determines the time-domain position of auxiliary synchronous signals according to the position relationship of step 1 gained 5ms timing information and primary and secondary synchronization signals, obtain the auxiliary synchronous signals RxSSSInFd of frequency domain by Fourier transform;

Step 3, carries out auxiliary synchronous signals search, obtains alternative cell ID set A and frame head position;

Step 4, falls the community ID making a false report in the ID set A of alternative cell by PBCH checksum filter, obtain verification community ID set B afterwards, and described PBCH is Physical Broadcast Channel;

Step 5, this iteration of comparison performs step 4 gained community ID set B and last iteration performs step 4 gained community ID set B, returns to step 3 and adjusts auxiliary synchronous signals search according to comparative result.

2. LTE homogeneous-frequency adjacent-domain detection method according to claim 1, is characterized in that: performs step at 3 o'clock, carries out auxiliary synchronous signals search and comprise that basic search step is as follows,

Step 3.1, arranges iterations upper limit iter1, and making current iteration number of times r is 1;

Step 3.2, generates 504 * 2 corresponding frequency domain auxiliary synchronous signals LocalSSSInFd;

Step 3.3, carries out auxiliary synchronous signals related operation, and according to gained auxiliary synchronous signals correlation peak, power Qiang community ID is determined in search, obtains frame head position, reconstructed frequency domain auxiliary synchronous signals, and Bing Jianggai community ID deposits alternative cell ID set A in,

Search is according to the first peak value location positioning of related operation, and respective formula is as follows,

$\mathrm{id}=\arg \left(\max \left(\underset{i=0}{\overset{i=61}{\mathrm{\Σ}}}(\mathrm{RxSSSInFd}\left(i\right).*\mathrm{LoaclSSSInFd}(i,c,s))\right)\right),$

Wherein, id represents the community ID searching out according to auxiliary synchronous signals correlation peak, and RxSSSInFd (i) represents the frequency domain auxiliary synchronous signals receiving, LoaclSSSInFd (i, c, s) frequency domain auxiliary synchronous signals corresponding to c community of s field that represent to generate; The value of signaling point sequence number i is 0≤i≤61, and the value of community sequence number c is 0≤c≤503; Sign s={0,1}, represents respectively half frame number of subframe 0 and subframe 5;

Step 3.4 deducts step 3.3 reconstruct gained frequency domain auxiliary synchronous signals from the auxiliary synchronous signals RxSSSInFd of step 2 gained frequency domain, obtains disturbing the frequency domain auxiliary synchronous signals RxSSSInFd ' after eliminating;

Step 3.5, make current iteration number of times r=r+1, then judge whether r surpasses iter1, returning to if not step 3.4 redefines peak value and eliminates and disturb, until current iteration number of times surpasses the iterations upper limit iter1 arranging, iteration finishes, and exports final alternative cell ID set A and frame head position.

3. LTE homogeneous-frequency adjacent-domain detection method according to claim 2, is characterized in that: in step 5, relatively this iteration performs step 4 gained community ID set B and last iteration performs step after 4 gained community ID set B,

If comparative result is to have the community ID newly increasing, be back to step 3, and perform step at 3 o'clock at next iteration, front n the execution step 3.3 power Qiang community ID that search out are set to by force to this iteration and perform step 4 gained community ID set B;

If be relatively the community ID not newly increasing, be back to step 3, and perform step at 3 o'clock at next iteration, front n the execution step 3.3 power Qiang community ID that search out are set to by force to this iteration and perform step 4 gained community ID set B, in iter1 execution step of n+1～the, it within 3.3 o'clock, not the first peak value location positioning according to related operation, but all peak values are arranged from big to small, according to offset peak after the first peak value, determine.

4. according to LTE homogeneous-frequency adjacent-domain detection method described in claim 1 or 2 or 3, it is characterized in that: in step 4, by PBCH checksum filter, fall the community ID making a false report in the ID set A of alternative cell and comprise the following steps,

Step 4.1 is taken out Yi Ge community ID as working as pre-treatment community ID, according to the PBCH signal of continuous 4 frames of frame head position acquisition from the ID set A of alternative cell, carry out PBCH verification, if verification, by entering step 4.2, if verification is not passed through, directly enters step 4.3;

Step 4.2, will work as pre-treatment community ID and deposit community ID set B in, and PBCH signal corresponding to pre-treatment community ID worked as in reconstruct, and deducts reconstruction result from original PBCH signal, disturbs elimination;

Step 4.3, return to step 4.1, from the ID set A of alternative cell, take out next community ID as pre-treatment community ID, carry out PBCH verification and disturb after elimination, until all community ID in the ID set A of alternative cell are disposed, obtain the set of cells B by PBCH verification.

5. a LTE homogeneous-frequency adjacent-domain checkout gear, is characterized in that, comprises with lower module:

Master sync signal position acquisition module, for receiving time-domain sampling signal, obtains 5ms timing information;

Auxiliary synchronous signals acquisition module, for determine the time-domain position of auxiliary synchronous signals according to the position relationship of master sync signal position acquisition module gained 5ms timing information and primary and secondary synchronization signals, obtains the auxiliary synchronous signals RxSSSInFd of frequency domain by Fourier transform; SSS search module, for carrying out auxiliary synchronous signals search, obtains alternative cell ID set A and frame head position;

Correction verification module, for fall the community ID that alternative cell ID set A is made a false report by PBCH checksum filter, obtains verification community ID set B afterwards, and described PBCH is Physical Broadcast Channel;

Relatively adjusting module, carry out verification gained community ID set B and last iteration execution verification gained community ID set B, and auxiliary synchronous signals search is next time carried out in adjustment according to comparative result order SSS search module for this iteration of twin check module.

6. LTE homogeneous-frequency adjacent-domain checkout gear according to claim 5, is characterized in that: SSS search module carries out auxiliary synchronous signals search and comprises that basic search step is as follows,

Step 3.1, arranges iterations upper limit iter1, and making current iteration number of times r is 1;

Step 3.2, generates 504 * 2 corresponding frequency domain auxiliary synchronous signals LocalSSSInFd;

Step 3.3, carries out auxiliary synchronous signals related operation, and according to gained auxiliary synchronous signals correlation peak, power Qiang community ID is determined in search, obtains frame head position, reconstructed frequency domain auxiliary synchronous signals, and Bing Jianggai community ID deposits alternative cell ID set A in,

Search is according to the first peak value location positioning of related operation, and respective formula is as follows,

$\mathrm{id}=\arg \left(\max \left(\underset{i=0}{\overset{i=61}{\mathrm{\Σ}}}(\mathrm{RxSSSInFd}\left(i\right).*\mathrm{LoaclSSSInFd}(i,c,s))\right)\right),$

Wherein, id represents the community ID searching out according to auxiliary synchronous signals correlation peak, and RxSSSInFd (i) represents the frequency domain auxiliary synchronous signals receiving, LoaclSSSInFd (i, c, s) frequency domain auxiliary synchronous signals corresponding to c community of s field that represent to generate; The value of signaling point sequence number i is 0≤i≤61, and the value of community sequence number c is 0≤c≤503; Sign s={0,1}, represents respectively half frame number of subframe 0 and subframe 5;

Step 3.4 deducts step 3.3 reconstruct gained frequency domain auxiliary synchronous signals from the auxiliary synchronous signals RxSSSInFd of auxiliary synchronous signals acquisition module gained frequency domain, obtains disturbing the frequency domain auxiliary synchronous signals RxSSSInFd ' after eliminating;

Step 3.5, make current iteration number of times r=r+1, then judge whether r surpasses iter1, returning to if not step 3.4 redefines peak value and eliminates and disturb, until current iteration number of times surpasses the iterations upper limit iter1 arranging, iteration finishes, and exports final alternative cell ID set A and frame head position.

7. LTE homogeneous-frequency adjacent-domain checkout gear according to claim 6, is characterized in that: relatively this iteration of adjusting module twin check module is carried out verification gained community ID set B and last iteration is carried out after the ID set B of verification gained community,

If comparative result is to have the community ID newly increasing, order SSS search module, when next iteration is carried out auxiliary synchronous signals search, is set to by force this iteration of correction verification module by front n the execution step 3.3 power Qiang community ID that search out and carries out verification gained community ID set B;

If be relatively the community ID not newly increasing, order SSS search module is when next iteration is carried out auxiliary synchronous signals search, front n the execution step 3.3 power Qiang community ID that search out are set to by force to this iteration of correction verification module and carry out verification gained community ID set B, in iter1 execution step of n+1～the, it within 3.3 o'clock, not the first peak value location positioning according to related operation, but all peak values are arranged from big to small, according to offset peak after the first peak value, determine.

8. according to LTE homogeneous-frequency adjacent-domain checkout gear described in claim 5 or 6 or 7, it is characterized in that: correction verification module falls by PBCH checksum filter the community ID making a false report in the ID set A of alternative cell and comprises the following steps,

Step 4.1 is taken out Yi Ge community ID as working as pre-treatment community ID, according to the PBCH signal of continuous 4 frames of frame head position acquisition from the ID set A of alternative cell, carry out PBCH verification, if verification, by entering step 4.2, if verification is not passed through, directly enters step 4.3;

Step 4.2, will work as pre-treatment community ID and deposit community ID set B in, and PBCH signal corresponding to pre-treatment community ID worked as in reconstruct, and deducts reconstruction result from original PBCH signal, disturbs elimination;

Step 4.3, return to step 4.1, from the ID set A of alternative cell, take out next community ID as pre-treatment community ID, carry out PBCH verification and disturb after elimination, until all community ID in the ID set A of alternative cell are disposed, obtain the set of cells B by PBCH verification.