CN105530703B - A kind of GSM-R interference source localization methods based on Mutual coupling value - Google Patents
A kind of GSM-R interference source localization methods based on Mutual coupling value Download PDFInfo
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- CN105530703B CN105530703B CN201610058465.1A CN201610058465A CN105530703B CN 105530703 B CN105530703 B CN 105530703B CN 201610058465 A CN201610058465 A CN 201610058465A CN 105530703 B CN105530703 B CN 105530703B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
Abstract
The invention belongs to railway wireless communication net interference source location technology and array signal processing technologies, are related to a kind of GSM-R interference source localization methods based on Mutual coupling value.The invention mainly comprises：DOA estimations are carried out to interference signal arrival bearing using the base stations GSM-R reception antenna, specific method is：Space diversity is carried out to GSM-R antenna for base station, builds two groups of aerial arrays, obtains the DOA estimated results to interference signal；According to the DOA estimated results obtained in step a, the linear equation of interference source and two base stations GSM-R reception antenna lines being established respectively, obtains the intersection point of this two straight lines, which is the position of interference source.Energy band of the present invention has the beneficial effect that, does not need receipt signal frequency spectrum data, is more convenient；The Correlative plans data such as network management system data, cellular cell layout data and drive test data are not needed, it is more independent；It is gradually positioned without using directional aerial, it is faster；The path loss model of environment need not be obtained in advance, it is more flexible.
Description
Technical field
The invention belongs to GSM-R (Global System for Mobile Communications-Railway) interference
Source location technology and array signal processing technology being based on interference signal arrival bearing DOA especially with regard to one kind
The GSM-R interference source localization methods of (direction of arrival) estimation.
Background technology
GSM-R is a kind of synthesis private wireless communication system designed exclusively for railway communication, by International Union of Railways
(UIC) it is researched and developed by European railway wireless communication of new generation with European Telecommunication Standard research institute (ETSI).GSM-R is with GSM technology
Based on, in conjunction with the demand of railway communication, add multipriority, the related services such as urgent call, group are exhaled, broadcast & call.
GSM-R systems are the development trends of China's Railway Communications, it can realize the various mobile message collections of resources of railway, transmission, be
The railway dispatching of modernization, commander, control provide communications platform, while improving the running efficiency of railway, reduce operation at
This.2003, the Ministry of Railways selected technical systems of the GSM-R as China railways future integrated digital scheduling net.GSM-R systems
The development for promoting railway construction in China is introduced, the paces of China railways informatization is accelerated, improves China railways
Competitiveness contributes to important strength for the economy and scientific and technological strength of country.
GSM-R frequency bands operate mainly within the scope of 885-889/930-934MHz, and total 4MHz bandwidth, the frequency range is by GSM-
R system exclusively enjoys.But due to popularizing for current electronic equipment, the electromagnetic environment in life becomes to become increasingly complex, due to two systems
Shared frequency range or frequency range it is close so that the electromagnetic interference between system also becomes unavoidable.For relative complex electromagnetism
Environment, there are many wireless networks to constitute, including mobile communication operation system, PMR private mobile radio equipment and call/broadcast system
System, i.e., civilian mobile system, group system and broadcast system, or even also have some uncommitted illegal wireless networks, these
The antenna of heterogeneous networks send out various different frequencies, different amplitude, different semaphore wireless signal, therefore hold very much in space
Easily cause interfering with each other between network.
Currently, being laid with various channels, area authorization or unauthorized base station and antenna along China railways.In although
State related agencies dictate GSM-R systems monopolize 4M bandwidth along the railway, however remaining is such as movement, unicom, telecommunications and wirelessly
The signal of radio station transmitting is likely to cause adjacent frequency interference and the Intermodulation Interference of GSM-R systems, and its illegal unauthorized obtain base station or
Co-channel interference caused by antenna.These wireless interference signals can all influence normally receiving and emitting for GSM-R, give base station overlay area
The mobile communication in domain brings the problems such as poor call drop, speech quality, channel congestion, so as to cause under the working efficiency of railway operation
Drop, or even bring secret worry to the safe operation of railway, the development of the life security of passenger and country.Therefore, there is an urgent need for effective
GSM-R interference source localization methods, influence of the timely exclusive PCR source to GSM-R communication systems, to ensure the safety of railway transportation
Property.
At this stage, the method positioned to interference source includes mainly：It is positioned using spectrum analysis to netting outer interference；
Interference source is positioned using network management system data, cellular cell layout data and test data；Using directional aerial into
Row Step wise approximation positions；Interference source is positioned using electromagnetic wave power propagation model and path loss model.Do not have also at present
There is the method for carrying out DOA estimations to the arrival bearing of interference signal using array signal processing to position interference source.
Invention content
The shortcomings that the purpose of the present invention is overcoming the prior art and deficiency, proposition is a kind of to use array signal process technique,
GSM-R interference sources are quickly positioned.GSM-R systems are mainly used for Line for Passenger Transportation or high-speed line, many places in rural open ground,
Electromagnetic wave is based on straightline propagation, multipath effect unobvious, thus can utilize interference signal arrival bearing to interference source into
Row positioning.In these areas, GSM-R systems use the antenna of space diversity, antenna or so to be placed in parallel, can regard as horizontal positioned
Even linear array aerial array.
The technical scheme is that：A kind of GSM-R interference source localization methods based on Mutual coupling value, feature
It is, includes the following steps：
A. the base stations GSM-R reception antenna is used to carry out DOA estimations to interference signal arrival bearing, specific method is：It is right
GSM-R antenna for base station carries out space diversity, builds two groups of aerial arrays, obtains the DOA estimated results to interference signal；
B. according to the DOA estimated results obtained in step a, interference source and two base stations GSM-R reception antennas are established respectively
The linear equation of line obtains the intersection point of this two straight lines, which is the position of interference source.
The total technical solution of the present invention mainly uses array signal process technique, is believed interference source using multi-antenna array
Number arrival bearing carry out DOA estimations, and according to two groups of aerial arrays to the estimation knot of the arrival bearing of the same interference signal
Fruit positions interference source.
Further, step a specifically includes following steps：
A1. the antenna of space diversity is used to constitute even linear array, each antenna represents an array element；
A2. front/rear to even linear array progress to space smoothing, construction is multiple front/rear to smooth and uniform linear array subarray；
A3. foundation is each front/rear to smooth and uniform linear array subarray receipt signal model, and calculates each front/rear to flat
The reception signal space correlation matrix of sliding even linear array subarray；
A4. to it is each it is front/rear to the reception signal space correlation matrix of smooth and uniform linear array subarray be averaging, obtain
The two-way space smoothing correlation matrix of even linear array；
A5. according to the two-way space smoothing correlation matrix of acquisition, the DOA of interference signal is estimated using the acquisition of MUSIC algorithms
Count result.
Energy band of the present invention has the beneficial effect that the present invention does not need receipt signal frequency spectrum data, is more convenient；Webmaster is not needed
The Correlative plans data such as system data, cellular cell layout data and drive test data, it is more independent；The present invention is without using orientation
Antenna is gradually positioned, faster；The present invention need not obtain the path loss model of environment in advance, more flexible.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the even linear array aerial array schematic diagram that the base stations the GSM-R spatial diversity antennas of the embodiment of the present invention is constituted；
Fig. 3 is that the GSM-R interference sources of the embodiment of the present invention position schematic diagram；
Fig. 4 be the use of the embodiment of the present invention even linear array before to smooth subarray schematic diagram；
Fig. 5 be the use of the embodiment of the present invention even linear array after to smooth subarray schematic diagram；
Fig. 6 is DOA estimated result of the base stations GSM-R of the embodiment of the present invention 1 to expectation GSM-R signals and interference signal；
Fig. 7 is DOA estimated result of the base stations GSM-R of the embodiment of the present invention 2 to expectation GSM-R signals and interference signal.
Specific implementation mode
The present invention is described in detail below with reference to the accompanying drawings and embodiments
As shown in Figure 1, the GSM-R interference source localization methods based on Mutual coupling value of the present invention, main solution party
Case is：Situation about may be concerned between homogenous frequency signal is considered first, using the base stations the GSM-R reception antenna of space diversity, is used
Even linear array space smoothing algorithm carries out DOA estimations to the arrival bearing of interference signal；Then according to two groups of aerial arrays to same
The geometric position of the estimated result of the arrival bearing of one interference signal and two groups of aerial arrays, draw two intersection it is straight
The intersection point of line, two straight lines is the position of interference source.
Embodiment
As shown in Fig. 2, being in same level so that 10 antennas of the base stations GSM-R spatial diversity antennas or so are evenly distributed
Example is described in detail.
Because Chinese Railway GSM-R systems are operated in 885-889/930-934MHz band limits, choose
Bay spacing is arranged as typical frequencies in 900MHz, and bay spacing is set as (0.5 × 3 × 108)/(900×106)
=0.15m.Array element spacing is much smaller than the distance between array element and interference source, it is believed that incidence angle of the interference signal to each array element
It is identical.Signal incident direction and the angle of even linear array normal direction are θ, the θ when signal injects even linear array on the left of normal
∈ (0 °, 90 °), the θ ∈ (- 90 °, 0 °) when signal injects even linear array on the right side of normal.
As shown in figure 3, the spatial diversity antennas of the base stations GSM-R 1 is located at coordinate A (0m, 0m), the space of the base stations GSM-R 2
Diversity antenna is located at coordinate B (100m, 0m), it is expected that GSM-R transmitters are located at coordinate O (45m, 5m), interference source, which is located at, to be sat
It marks at C (50m, 50m).
In experimentation known to the position of the base stations GSM-R 1 and the base stations GSM-R 2.If it is expected that GSM-R transmitter sites are
(X1,Y1), position of interference source is (X2,Y2)。
It is expected that the incidence angle of GSM-R signals to base station 1 is θ1, the incidence angle of interference signal to base station 1 is θ2.It is expected that GSM-R
The incidence angle of signal to base station 2 isThe incidence angle of interference signal to base station 2 is
As shown in Fig. 2, the reception signal data of 1 even linear array reception antenna of base station is：
Wherein, s (t)=s [s1(t) s2(t)]TIt is expected GSM-R signals and interference signal, n (t)=;n1(t) n3(t)
… n10(t)]TThe array received noise of 10 array element, noise variance σ2, A=[a(θ1) a(θ2)]It is oriented to matrix for array,
a(θi)=[1 e-jβi … e-9jβi]TFor signal si(t) guiding vector, βi=2 π d sin θsi/ λ is signal si(t) two are reached
The phase difference of a adjacent array element.
As shown in figure 4, using array number M=10 even linear arrays, P sub- array combinations of construction to space smoothing using preceding
(P=6), the array number m=5 of each subarray.
The reception signal data of k-th of subarray is：
Wherein, C=[c(θ1) c(θ2)]It is oriented to matrix, c (θ for the array of k-th of subarrayi)=[1 e-jβi … e-j(k-1)βi]TFor signal si(t) the array guiding vector of k-th of subarray,For adjacent subarray it
Between phase shift matrix, nk(t)=[nk(t) nk+1(t) … nk+4(t)]TFor the array received noise of k-th of subarray.
The received signal vector of k-th of subarraySpatial correlation matrix be：
Wherein, Rs=E { s (t) sH(t) } it is that interference source emits signal space correlation matrix, I is unit battle array.
The spatial correlation function of each forward direction space smoothing subarray is averaging, to space smoothing space phase before can obtaining
Close function.
Similarly, as shown in figure 5, can obtain through the rear auto-correlation function matrix obtained later to space smoothing
Two-way space smoothing algorithm is exactly to preceding to smooth Cyclic Autocorrelation Function matrix and backward smooth cycle auto-correlation
Jacobian matrix is averaged, and two-way space smoothing Cyclic Autocorrelation Function matrix is：
To Rx(τ) carries out Eigenvalues Decomposition, two larger eigenvalue λs1、λ2Corresponding feature vector u1、u2Constitute signal
Subspace, three smaller eigenvalue λs3、λ4、λ5Corresponding feature vector u3、u4、u5Constitute noise subspace.Define matrix：
G=[u3 u4 u5]
Since matrix A is sequency spectrum matrix, RxFor non-singular matrix, can prove：
GHA=GH[a(θ1) a(θ2)]=0
That is GHa(θi)=0.So it may be concluded that when θ is signal arrival bearing, GHA (θ)=0.
Use MUSIC Power estimations：
When θ is signal arrival bearing, PMUSICMaximum is obtained, MUSIC spectrum peak searches are passed through, you can obtains coming for signal
Wave direction.
The expectation GSM-R signal arrival bearings estimated by experiment, the base stations GSM-R 1Interference signal is come
Wave direction isAs shown in Figure 6.The base stations GSM-R 2 estimate expectation GSM-R signal arrival bearings beInterference signal arrival bearing isAs shown in Figure 7.
For interference signal, the interference signal arrival bearing estimated according to the base stations GSM-R 1 and the base stations GSM-R 1 is
The interference signal arrival bearing that 2 position of the base stations GSM-R and the base stations GSM-R 2 are estimated isIt can obtain it is expected GSM-R signals institute
Straight line equation group：
Equation group is solved, position of interference source (50.026m, 49.991m) can be calculated separately out.
From experimental result as can be seen that using the method for the present invention, can come using only the interference signal that GSM-R is detected
Wave direction can easily and efficiently position interference source.
Claims (1)
1. a kind of GSM-R interference source localization methods based on Mutual coupling value, which is characterized in that include the following steps：
A. the base stations GSM-R reception antenna is used to carry out DOA estimations to interference signal arrival bearing, specific method is：To GSM-R bases
Station antenna carries out space diversity, builds two groups of aerial arrays, obtains the DOA estimated results to interference signal, including
A1. the antenna of space diversity is used to constitute even linear array, each antenna represents an array element；
A2. front/rear to even linear array progress to space smoothing, construction is multiple front/rear to smooth and uniform linear array subarray；
A3. foundation is each front/rear to smooth and uniform linear array subarray receipt signal model, and calculates each front/rear to smooth equal
The reception signal space correlation matrix of even linear array subarray；
A4. to it is each it is front/rear to the reception signal space correlation matrix of smooth and uniform linear array subarray be averaging, obtain uniform line
The two-way space smoothing correlation matrix of battle array；
A5. it according to the two-way space smoothing correlation matrix of acquisition, is obtained using MUSIC algorithms and knot is estimated to the DOA of interference signal
Fruit；
B. according to the DOA estimated results obtained in step a, interference source and two base stations GSM-R reception antenna lines are established respectively
Linear equation, obtain the intersection point of this two straight lines, the intersection point be interference source position.
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| CN109031193B (en) * | 2018-07-05 | 2021-04-16 | 中国人民解放军国防科技大学 | Indoor illegal signal source positioning system and method based on signal arrival direction |
| CN110297214A (en) * | 2019-07-17 | 2019-10-01 | 南京航空航天大学 | Mostly relatively prime array cooperates with indoor radiation source positioning device and method |
| CN110554352A (en) * | 2019-09-11 | 2019-12-10 | 哈尔滨工业大学 | Method for estimating direction of arrival of interference source of aerospace measurement and control system based on VGG16 neural network |
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| CN1547332A (en) * | 2003-12-02 | 2004-11-17 | 中国人民解放军空军雷达学院 | Interference blocking spatial spectrum estimation method |
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| CN101729163A (en) * | 2008-10-20 | 2010-06-09 | 大唐移动通信设备有限公司 | Method and equipment for determining interference source of mobile communication |
| CN102083103A (en) * | 2009-11-27 | 2011-06-01 | 中国移动通信集团北京有限公司 | Method and apparatus for determining positioning reference point in interference source positioning system |
| CN103941267A (en) * | 2014-03-17 | 2014-07-23 | 中国民航大学 | Satellite navigation deception interference suppression method combined with denoising and DOA estimation |
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| US6930637B2 (en) * | 2001-11-15 | 2005-08-16 | Texas Instruments Incorporated | Method and apparatus for high resolution tracking via mono-pulse beam-forming in a communication system |
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Patent Citations (6)
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|---|---|---|---|---|
| CN1547332A (en) * | 2003-12-02 | 2004-11-17 | 中国人民解放军空军雷达学院 | Interference blocking spatial spectrum estimation method |
| CN1798414A (en) * | 2004-12-23 | 2006-07-05 | 华为技术有限公司 | Method for locating interference source in up going route |
| CN101349741A (en) * | 2008-08-29 | 2009-01-21 | 西安电子科技大学 | Phased array digital multi-beam forming machine for electron reconnaissance |
| CN101729163A (en) * | 2008-10-20 | 2010-06-09 | 大唐移动通信设备有限公司 | Method and equipment for determining interference source of mobile communication |
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