CN103796219A - Long distance cofrequency interference source detection and positioning method for TD-LTE system - Google Patents

Abstract

The invention relates to a long distance cofrequency interference source detection and positioning method for a TD-LTE system. According to the detection method, a main synchronization signal of detected interference signals is compared with a main synchronization signal of local district signals in time domains, if time difference surpasses the threshold, the interference signals are a long distance cofrequency interference source; according to the positioning method, physical-level district ID parameters contained in the a secondary synchronization signal and in the main synchronization signal in the interference signals are utilized to acquire the signal district ID, and a position of the interference district is determined according to a signal district ID configuration table. Compared with the prior art, the method has advantages of high accuracy and high operation efficiency.

Description

The remote same-frequency interference source of TD-LTE system detects and localization method

Technical field

The present invention relates to wireless communication technology field, be specifically related to carry out in a kind of TD-LTE of can be applicable to system the method for remote same-frequency interference source detection and location.

Background technology

For jumbo communication is provided in limited frequency resource, cellular communication system has adopted channeling technology, and same communication frequency can geographically be used apart from multiple communities enough far away simultaneously.But along with the surge of modern cellular communication system traffic carrying capacity, channeling is more and more intensive, use the Distance Shortened of the community (being called " co-frequency cell ") of same frequency, co-channel interference is just inevitable.

Especially, in TDD system, different base station is keeping under the synchronous prerequisite of strict time, adjacent co-frequency cell can produce closely co-channel interference, be embodied in the interference that the downstream signal of the downstream signal Dui Zhe community of adjacent co-frequency cell causes, and the interference that causes of the upward signal of the upward signal Dui Zhe community of adjacent co-frequency cell.Under some special climatic effect, electromagnetic transmission loss is very little, can walk around ground level, realize over the horizon transmission, therefore in TDD system, in the time that base station, distant place reaches certain base station height, the in the situation that of some special climate effect, the downstream signal of community can long-distance transmissions arrive this community at a distance, interval is protected in the up-downgoing that exceedes TDD system due to the long-distance transmissions time, the downstream signal of community is received by this cell base station at the receiving slot of this cell base station at a distance, disturb the upward signal of this community, thereby produce TDD system remote co-channel interference.

Existing interference source location technology is more suitable for the closely location in co-channel interference source mostly, for example: the method that reaches angle or interfering signal power Variation Features location interference source by ripple, or adopt traditional relatively accurately road measuring method on the spot, in actual use procedure, all there is certain defect in these two kinds of methods:

For first method, at electromagnetic wave after the transmission of over the horizon, overlength distance, locate conventionally inaccurate, can not adaptation to the ground and the variation of the factor such as weather.

Second method, i.e. and relatively traditional road measuring method on the spot accurately, it need use sport car progressively to approach interference source along the direction of high reject signal, whole process all must have been assisted by attendant, particularly time and effort consuming more aspect long distance positioning, tool bears the character of much blindness.

Chinese patent application (the application number: the method and the device that 201010107250.7) disclose a kind of positioning remote same-frequency interference source of publication number: CN102149096A.In its disclosed scheme, the method for positioning remote same-frequency interference source comprises step: after determining the suffered interference in disturbed base station and being remote co-channel interference, determine the distance value between generation place and the disturbed base station that produces remote co-channel interference, and obtain the interference signal scrambling code information used that disturbed base station receives, and according to the scrambling code information of the distance value of determining and acquisition, determine that producing executing of remote co-channel interference disturbs base station, executing of determining disturbed base station and is the remote same-frequency interference source of disturbed base station.

Above-mentioned localization method first calculates the distance value of this community and interfered cell by the propagation delay time of interference signal, in the scope that meets distance value, utilize scrambling code information screening community, under the orographic condition of special weather conditions and complexity, interference signal transmission path complexity, the method for the time-delay calculation interference source distance of the interference signal that only utilization receives is inaccurate.

Definite method of multiple remote same-frequency interference source is also disclosed in above-mentioned application:

1, judge in the disturbed Resource Block RB of disturbed base station whether have the orthogonal frequency division multiplex OFDM symbol not being interfered, determine that this interference source is remote co-channel interference if exist;

2, obtain the disturbed intensity of each disturbed OFDM symbol in the disturbed RB of disturbed base station, if according to the disturbed intensity obtaining, determine in disturbed RB, the disturbed intensity of the each disturbed OFDM symbol generating successively according to time order and function order weakens successively, determines that the interference that receive disturbed base station is remote co-channel interference;

3, the acquisition base station adjacent with disturbed base station is with assignment information and the uplink scheduling information of the Physical Random Access Channel PRACH of base station, Yue district, disturbed base station; If according to assignment information and the uplink scheduling information of the PRACH obtaining, determine the base station adjacent with disturbed base station and base station, Yue district, disturbed base station, all the disturbed RB of described disturbed base station is not distributed to user, determine that the interference that disturbed base station is subject to is remote co-channel interference;

If 4 judge in the predeterminated frequency region of disturbed base station and are subject to constant interference, determine that the interference that disturbed base station is subject to is remote co-channel interference.

In said method, the 1st, 2,4 kind be all that the power of the interference signal based on receiving judges whether to be subject to remote co-channel interference, when being subject to the impact of random noise, the method accuracy can decline to some extent.And method 3 needs to obtain the relevant information of the possible base station that applies interference on a large scale, expense is larger, and operational efficiency is lower.

Summary of the invention

Object of the present invention is exactly to provide a kind of remote same-frequency interference source of TD-LTE system to detect and localization method in order to overcome the defect that above-mentioned prior art exists, and the method accuracy is good and operational efficiency is high.

Object of the present invention can be achieved through the following technical solutions:

A kind of remote same-frequency interference source detection method of TD-LTE system, it is characterized in that, the master sync signal of the master sync signal in the interference signal detecting and this cell signal is carried out the comparison in time domain by this detection method, if the time difference exceedes threshold value, this interference signal is remote same-frequency interference source.

The method specifically comprises the following steps:

1) extract the interference signal within the scope of default time-frequency domain;

2) detect the master sync signal in interference signal, and carry out type matching with the copy of 3 kinds of master sync signals in this cell signal, determine the type of the master sync signal in interference signal;

3) master sync signal of interference signal is carried out to the comparison in time domain with the similar master sync signal of this cell signal, if overtime difference limen value, this interference signal is remote same-frequency interference source.

Step 1) in the interference signal extracted be the data that are positioned at field before the 1.08MHz of frequency domain central authorities position.

Step 2) in the detailed process of type matching be: the copy of 3 kinds of master sync signals of this cell signal is converted into time domain from frequency domain, and the slip related operation of doing in time domain with the time point of the master sync signal of interference signal respectively mates backward, the master sync signal of correlation maximum is the master sync signal type of interference signal.

Described slip related operation is specially: will after the frequency-region signal zero padding expansion of 3 master sync signal copies, carry out IDFT conversion, obtain the time-domain signal of master sync signal copy, simultaneously according to step 1) time domain data of the interference signal extracted, calculates cross-correlation function value according to following formula:

$R\left(d\right)=\underset{n=0}{\overset{N_{\mathrm{PSS}}-1}{\mathrm{\Σ}}}y(d+n){\left(p_{\mathrm{time}}^{\left(u\right)}\left(n\right)\right)}^{*}$

In formula,

for the time-domain signal of master sync signal copy, y (n) is step 1) time domain data of interference signal that extracts, N _pSSfor the sampling number of master sync signal, u is the index value of the ZC sequence of master sync signal sequence use, and d is slip side-play amount, 0≤d≤M, and M is the sampling number of signal first half frame data.

Step 3) in time difference threshold value determine according to the configuring condition of special subframe in synchronizing signal frame structure and the type of Cyclic Prefix.

A kind of remote same-frequency interference source localization method of the TD-LTE system of applying above-mentioned detection method, first this localization method adopts the remote same-frequency interference source detection method of TD-LTE system to detect and determines the interference signal that remote same-frequency interference source sends, then utilize the physical-layer cell ID parameter that in interference signal, auxiliary synchronous signals and master sync signal comprise, calculate physical-layer cell ID, and determine the position of the community of disturbing remote same-frequency interference source place according to the allocation list of physical-layer cell ID.

This localization method comprises the following steps:

A) adopt the remote same-frequency interference source detection method of TD-LTE system to detect the interference signal of determining as remote same-frequency interference source;

B) obtain sending the parameter of the physical-layer cell ID group of this interference signal according to the auxiliary synchronous signals of described interference signal

C) according to steps A) in the type of the master sync signal that detects, obtain sending the parameter of the physical-layer cell ID in the physical-layer cell ID group of this interference signal

D) by following formula, obtain the physical-layer cell ID at remote same-frequency interference source place, realize interference source location:

$N_{\mathrm{ID}}^{\mathrm{cell}}=N_{\mathrm{ID}}^{\left(2\right)}+3N{N}_{\mathrm{ID}}^{\left(1\right)}$

Wherein,

for the parameter of cell physical layer community ID group,

for the parameter of the physical-layer cell ID in the ID group of physical-layer cell, for physical-layer cell ID;

E), according to the physical-layer cell ID at remote same-frequency interference source place, the allocation list of searching community ID is determined the position of interfered cell.

Step B) comprise the following steps:

B1), according to the time-domain position of the master sync signal in interference signal, determine the time-domain position of the auxiliary synchronous signals in interference signal;

B2) the time domain auxiliary synchronous signals obtaining is transformed to frequency domain auxiliary synchronous signals;

B3) frequency domain auxiliary synchronous signals is detected, obtain the parameter with physical-layer cell ID group

Described auxiliary synchronous signals adopts sequence detecting method to detect.

Compared with prior art, after the present invention utilizes master sync signal to determine that suffered interference is for remote co-channel interference, and determine the position of remote same-frequency interference source in conjunction with the testing result of auxiliary synchronous signals.Whole process does not need attendant's participation, save a large amount of manpower and materials, improved the efficiency of location, simultaneously because synchronizing signal has good correlation properties, therefore the present invention can adapt to the variation of the factor such as different terrain, weather, has good stability and accuracy.

Accompanying drawing explanation

Fig. 1 is that TD-LTE system same frequency disturbs schematic diagram, wherein, (A) is closely co-channel interference schematic diagram, (B) remote co-channel interference schematic diagram;

Fig. 2 is the detection method schematic flow sheet of remote same-frequency interference source;

Fig. 3 is the localization method schematic flow sheet of remote same-frequency interference source;

Fig. 4 is the master sync signal of TD-LTE system and the position view of auxiliary synchronous signals.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

Embodiment

Referring to Fig. 1 (A) and Fig. 1 (B), it is respectively the closely schematic diagram of co-channel interference and remote co-channel interference of TD-LTE system.As seen from the figure; when interfered cell closer; it is less that the signal of interfered cell is transferred to this cell time delay; do not exceed TD-LTE system up-downgoing protection interval GP; therefore; closely co-channel interference shows as the interference of the downstream signal of the downstream signal Dui Zhe community of interfered cell, and the interference of the upward signal of interfered cell to this cell uplink signal.If but under extreme terrain and weather condition factor; the signal of community can arrive this community through transmitting at a distance at a distance; propagation delay time is larger, has exceeded protection interval GP, at this moment disturbs the interference of the downstream signal that shows as interfered cell to this cell uplink signal.

Referring to Fig. 4, in TD-LTE system, downlink synchronous signal is divided into master sync signal PSS and auxiliary synchronous signals SSS, and their time-domain positions in whole frame structure are fixed, the position of the central 1.08MHz in whole system bandwidth always on frequency domain.Therefore can first detect the master sync signal of interfered cell, the master sync signal comparison of Yu Zhe community, if the time difference exceedes certain limit, thinks that suffered interference is remote co-channel interference, otherwise thinks closely co-channel interference.

Owing to always having three kinds of master sync signals in TD-LTE system, and known these three kinds of master sync signals in the base station of each community 3 master sync signal sequences of standby system (base station of each community can), and the master sync signal of each community only uses one of them sequence to send, the sequence of use is relevant with signal cell ID.Therefore, in the time detecting the master sync signal of interfered cell, the copy of the three kinds of master sync signals in Yong Zhe community is compared (doing slip related operation mates) in reception signal respectively, thereby determines the master sync signal sequence that interfered cell is used.

For judging time difference threshold value, determine according to the type of the configuring condition of special subframe and Cyclic Prefix in the present invention.

Subframe 1 is different from other subframes with 6 as seen from Figure 4, is made up of DwPTS, GP and UpPTS tri-parts, is called special subframe, and in TD-LTE system, special subframe has following several configuring condition, as shown in table 1:

The time difference threshold value that judges remote same-frequency interference source can be determined according to the type of the configuring condition of special subframe and Cyclic Prefix.If this community adopts identical special subframe configuration and identical cyclic prefix type with interference signal transmitting community, so, time threshold is exactly the shared time span of this community up-downgoing protection interval GP.For example, this community special subframe adopts configuration 0 and regular circulation prefix, and time difference threshold value can be selected 10 OFDM symbols so, according to TD-LTE standard, is 0.714ms.

Table 1

The location of remote co-channel interference community can be realized by the community ID that detects interfered cell.The community ID of TD-LTE system and the sequence that synchronizing signal is used are closely related.LTE supports 504 physical-layer cell ID, and these physical-layer cells ID is divided into 168 groups, is called physical-layer cell ID group, and each group comprises 3 physical-layer cell ID.Like this, a physical-layer cell ID just can be by the parameter of represents physical layer community ID group

(scope is 0～167, is carried by SSS) and represent the parameter of the physical-layer cell ID in the ID group of this physical-layer cell

(scope is 0～2, is carried by PSS) carrys out unique definition, passes through

obtain the ID of inter-frequency interference cell.

Master sync signal PSS is produced by frequency domain ZC sequence, and one has the main synchronizing sequence that 3 length are 62, sees following formula:

$d_u\left(n\right)=\left\{\begin{array}{cc}{e}^{-j\frac{\mathrm{\πum}(n+1)}{63}}& n=\mathrm{0,1},...,30\\ e^{-j\frac{\mathrm{\πu}(n+1)(n+2)}{63}}& n=\mathrm{31,32},...,61\end{array}\right.$

The index u of the ZC sequence that wherein, 3 main synchronizing sequences use and 3 represent the numeral of the physical-layer cell ID in the ID group of this physical-layer cell

there are mapping relations one by one, as shown in table 2:

Table 2

Therefore index u corresponding to sequence, using by detection PSS obtains parameter

The binary sequence s that SSS sequence is is 31 by two length ₀and s (n) ₁(n) sequence connecting into after interweaving, is designated as d (n), and the merging mode of the sequence that these two length are 31 is different in even number subframe 0 and odd number subframe 5, and concrete mode is shown in following formula:

Wherein 0≤n≤30, m ₀and m ₁it is the parameter of being organized by physical-layer cell ID

determine, relation is shown below:

m ₀＝m′mod31

for rounding downwards, m ' qq ' waits as calculating required intermediate variable.

Its mapping relations are specifically in table 3.

these two sequences are m sequences

two cyclically shifted sequences, see following formula:

$s_0^{\left(m_0\right)}\left(n\right)=\tilde{s}\left((n+m_0)\mathrm{mod}31\right)$

$s_1^{\left(m_1\right)}\left(n\right)=\tilde{s}\left((n+m_1)\mathrm{mod}31\right)$

Wherein,

0≤i≤30, are defined as

initial condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.

C ₀(n), c ₁(n) and all the scramble sequence that produce SSS.Two scramble sequence c ₀and c (n) ₁(n) being determined by master sync signal, is m sequence

two cyclically shifted sequences, see following formula.

$c_0\left(n\right)=\tilde{c}\left((n+N_{\mathrm{ID}}^{\left(2\right)})\mathrm{mod}31\right)$

$c_1\left(n\right)=\tilde{c}\left((n+N_{\mathrm{ID}}^{\left(2\right)}+3)\mathrm{mod}31\right)$

Wherein,

0≤i≤30, are defined as

initial condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.

Scramble sequence

it is m sequence

cyclic shift, see following formula:

$z_1^{\left(m_0\right)}\left(n\right)=\tilde{z}(n+\left(m_0\mathrm{mod}8\right)\mathrm{mod}31)$

0≤i≤30, are defined as $x(\stackrel{\&OverBar;}{i}+5)=(x(\stackrel{\&OverBar;}{i}+4)+x(\stackrel{\&OverBar;}{i}+2)+x(\stackrel{\&OverBar;}{i}+1)+x\left(\stackrel{\&OverBar;}{i}\right))\mathrm{<figure-callout\; id="2"\; label="mod"\; filenames="HDA00002312943900012.png"\; state="\{\{state\}\}">mod</figure-callout>}2,$

initial condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.

Therefore, can obtain parameter m by detecting SSS ₀and m ₁, according to m ₀, m ₁with relation, determine the parameter of physical-layer cell ID group thereby detect the parameter of the physical-layer cell ID in the physical-layer cell ID group obtaining in conjunction with PSS

determine the community ID of interfered cell, thus positioning remote same-frequency interference source.

Table 3

Based on above-mentioned principle, this example in TD-LTE system, carry out remote same-frequency interference source detection method step as shown in Figure 2, comprise the following steps:

Step 1: extract the interference signal within the scope of default time-frequency domain;

Fig. 4 has provided the position view of master sync signal PSS and auxiliary synchronous signals SSS, can find out PSS and the SSS signal position in the 1.08MHz of whole system bandwidth central authorities always on frequency domain.The every 5ms transmission primaries of master sync signal, the sequence that in a radio frames, former and later two fields use is identical, in addition, SSS of the present invention detects and adopts sequence detecting method, only utilize the data of even number subframe to detect, therefore, the present invention only need to extract the first half frame data in central 1.08MHz position on frequency domain.

Step 2: detect the master sync signal in interference signal, and carry out type matching with the copy of 3 kinds of master sync signals in this cell signal, determine the type of the master sync signal in interference signal;

Master sync signal uses ZC sequence, ZC sequence converts time-domain signal to still good orthogonality, therefore 3 local master sync signal copies can be transformed to time domain from frequency domain, make the slip related operation in time domain with the time point of the master sync signal of the signal Cong Zhe community of extraction in step 1, the master sync signal of correlation maximum is the master sync signal type of interference signal backward.

Wherein, the detailed process of slip related operation is: will after the frequency-region signal zero padding expansion of 3 master sync signal copies, carry out IDFT conversion, obtain the time-domain signal of master sync signal copy, simultaneously according to step 1) time domain data of the interference signal extracted, calculates cross-correlation function value according to following formula:

$R\left(d\right)=\underset{n=0}{\overset{N_{\mathrm{PSS}}-1}{\mathrm{\&Sigma;}}}y(d+n){\left(p_{\mathrm{time}}^{\left(u\right)}\left(n\right)\right)}^{*}$

In formula,

for the time-domain signal of master sync signal copy, y (n) is step 1) time domain data of interference signal that extracts, N _pSSfor the sampling number of master sync signal, u is the index value of the ZC sequence of master sync signal sequence use, and d is slip side-play amount, 0≤d≤M, and M is the sampling number of signal first half frame data.

In this step, can record the parameter of the physical layer ID in the time-domain position of this master sync signal and this physical layer of representative ID group of correspondence thereof simultaneously

for the location of remote same-frequency interference source.

Step 3; The master sync signal of interference signal is carried out to the comparison in time domain with the similar master sync signal of this cell signal, if overtime difference limen value, this interference signal is remote same-frequency interference source, and wherein time difference threshold value is determined according to the configuring condition of special subframe in synchronizing signal frame structure and the type of Cyclic Prefix.

The present invention also provides a kind of remote same-frequency interference source localization method of TD-LTE system, and this localization method need to be applied to above-mentioned detection method, its concrete steps as shown in Figure 3,

Steps A: adopt the remote same-frequency interference source detection method of TD-LTE system to detect the interference signal of determining as remote same-frequency interference source;

Step B: detect the auxiliary synchronous signals in interference signal, and obtain the parameter of the physical-layer cell ID group of sending this interference signal according to the auxiliary synchronous signals of described interference signal

PSS takies the 3rd OFDM symbol of subframe 1,6 as seen from Figure 3, and SSS takies last 1 symbol of subframe 0,5.The time-domain position of PSS and SSS signal is relative fixing, differs 3 OFDM symbols, therefore, can determine the time-domain position of the SSS of interfered cell according to the time-domain position of the interfered cell PSS of record in step 21.

The orthogonality that the m sequence that SSS adopts has only had on frequency domain, therefore needs first to transform to frequency domain, then carries out coherent detection.SSS has two kinds of detection modes, Sequence Detection and joint-detection.Sequence Detection is only utilized a SSS symbol, and joint-detection need to be utilized the SSS symbol of former and later two fields.Consider that Sequence Detection is compared with joint-detection, can reduce by 30% operand, therefore, the present invention adopts sequence detecting method, and concrete grammar is as follows:

The frequency domain auxiliary synchronous signals receiving is denoted as w (n), 0≤n≤61, w (2n) and w (2n+1) represent respectively even number sequence and odd number sequence, by the m sequence s (n) of structure SSS, 0≤n≤30 twice repeats, and obtains reference sequences s _ref(n), 0≤n≤61.

M ₀, m ₁detected value

with

obtained by following formula:

${\hat{m}}_0=\underset{m_0}{\arg \max }=(\underset{n=0}{\overset{30}{\mathrm{\&Sigma;}}}w\left(2n\right)\&CenterDot;c_0\left(n\right)\&CenterDot;{\left(s_{\mathrm{ref}}(n+m_0)\right)}^{*})$

${\hat{m}}_1=\underset{m_{}}{\mathrm{<figure-callout\; id="1"\; label="arg\; max\; m"\; filenames="HDA00002312943900012.png"\; state="\{\{state\}\}">arg</figure-callout>}\max }=(\underset{n=0}{\overset{30}{\mathrm{\&Sigma;}}}w(2n+1)\&CenterDot;c_1\left(n\right)\&CenterDot;z_1^{(m_0={\hat{m}}_0)}\left(n\right)\&CenterDot;{\left(s_{\mathrm{ref}}(n+m_1)\right)}^{*})$

0≤m ₀≤29，1≤m ₁≤30

Wherein, c ₀(n), c ₁and z (n) ₁(n) be foregoing scramble sequence.Obtained by above formula

with

search in TD-LTE standard

and m ₀with m ₁between mapping relations table obtain

Step C: according to the type of the master sync signal detecting in steps A, obtain sending the parameter of the physical-layer cell ID in the physical-layer cell ID group of this interference signal

Step D: by following formula, obtain the physical-layer cell ID at remote same-frequency interference source place, realize interference source location:

$N_{\mathrm{ID}}^{\mathrm{cell}}=N_{\mathrm{ID}}^{\left(2\right)}+3N_{\mathrm{ID}}^{\left(1\right)}$

Wherein,

for the parameter of cell physical layer community ID group,

for the parameter of the physical-layer cell ID in the ID group of physical-layer cell,

for physical-layer cell ID;

Step e; According to the physical-layer cell ID at remote same-frequency interference source place, the allocation list of searching community ID is determined the position of interfered cell.

More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (10)

1. the remote same-frequency interference source detection method of a TD-LTE system, it is characterized in that, the master sync signal of the master sync signal in the interference signal detecting and this cell signal is carried out the comparison in time domain by this detection method, if the time difference exceedes threshold value, determine that this interference signal is remote same-frequency interference source.

2. the remote same-frequency interference source detection method of a kind of TD-LTE system according to claim 1, is characterized in that, the method specifically comprises the following steps:

1) extract the interference signal within the scope of default time-frequency domain;

2) detect the master sync signal in interference signal, and carry out type matching with the copy of 3 kinds of master sync signals in this cell signal, determine the type of the master sync signal in interference signal;

3) master sync signal of interference signal is carried out to the comparison in time domain with the similar master sync signal of this cell signal, if overtime difference limen value determines that this interference signal is remote same-frequency interference source.

3. the remote same-frequency interference source detection method of a kind of TD-LTE system according to claim 2, is characterized in that step 1) in the interference signal extracted be the data that are positioned at field before the 1.08MHz of frequency domain central authorities position.

4. the remote same-frequency interference source detection method of a kind of TD-LTE system according to claim 2, it is characterized in that, step 2) in the detailed process of type matching be: the copy of 3 kinds of master sync signals of this cell signal is converted into time domain from frequency domain, and the slip related operation of doing in time domain with the time point of the master sync signal of interference signal respectively carries out mating of master sync signal backward, the master sync signal of correlation maximum is the master sync signal type of interference signal.

5. the remote same-frequency interference source localization method of TD-LTE system according to claim 4, it is characterized in that, described slip related operation is specially: will after the frequency-region signal zero padding expansion of 3 master sync signal copies, carry out IDFT conversion, obtain the time-domain signal of master sync signal copy, simultaneously according to step 1) time domain data of the interference signal extracted, calculates cross-correlation function value according to following formula;

$R\left(d\right)=\underset{n=0}{\overset{N_{\mathrm{PSS}}-1}{\mathrm{\&Sigma;}}}y(d+n){\left(p_{\mathrm{time}}^{\left(u\right)}\left(n\right)\right)}^{*}$

In formula, for the time-domain signal of master sync signal copy, y (n) is step 1) time domain data of interference signal that extracts, N _pSSfor the sampling number of master sync signal, u is the index value of the ZC sequence of master sync signal sequence use, and d is slip side-play amount, 0≤d≤M, and M is the sampling number of signal first half frame data.

6. the remote same-frequency interference source detection method of a kind of TD-LTE system according to claim 2, is characterized in that step 3) in time difference threshold value determine according to the configuring condition of special subframe in synchronizing signal frame structure and the type of Cyclic Prefix.

7. the remote same-frequency interference source localization method of the TD-LTE system of detection method described in an application rights requirement 1, it is characterized in that, first this localization method adopts the remote same-frequency interference source detection method of TD-LTE system to detect and determines the interference signal that remote same-frequency interference source sends, then utilize the physical-layer cell ID parameter that in interference signal, auxiliary synchronous signals and master sync signal comprise, calculate physical-layer cell ID, and determine the position of the community of disturbing remote same-frequency interference source place according to the allocation list of physical-layer cell ID.

8. the remote same-frequency interference source localization method of TD-LTE system according to claim 7, is characterized in that, this localization method comprises the following steps:

A) adopt the remote same-frequency interference source detection method of TD-LTE system to detect the interference signal of determining as remote same-frequency interference source;

B) obtain sending the parameter of the physical-layer cell ID group of this interference signal according to the auxiliary synchronous signals of described interference signal

C) according to steps A) in the type of the master sync signal that detects, obtain sending the parameter of the physical-layer cell ID in the physical-layer cell ID group of this interference signal

D) by following formula, obtain the physical-layer cell ID at remote same-frequency interference source place, realize interference source location:

$N_{\mathrm{ID}}^{\mathrm{cell}}=N_{\mathrm{ID}}^{\left(2\right)}+3N{N}_{\mathrm{ID}}^{\left(1\right)}$

Wherein,

for the parameter of cell physical layer community ID group,

for the parameter of the physical-layer cell ID in the ID group of physical-layer cell, for physical-layer cell ID;

E), according to the physical-layer cell ID at remote same-frequency interference source place, search the allocation list of community ID and determine the position of disturbing community, remote same-frequency interference source place.

9. the remote same-frequency interference source localization method of TD-LTE system according to claim 7, is characterized in that step B) comprise the following steps:

B1), according to the time-domain position of the master sync signal in interference signal, determine the time-domain position of the auxiliary synchronous signals in interference signal;

B2) the time domain auxiliary synchronous signals obtaining is transformed to frequency domain auxiliary synchronous signals;

B3) frequency domain auxiliary synchronous signals is detected, obtain the parameter with physical-layer cell ID group

10. the remote same-frequency interference source localization method of TD-LTE system according to claim 7, is characterized in that, described auxiliary synchronous signals adopts sequence detecting method to detect.

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