CN108008351B

CN108008351B - Signal positioning method based on forward attenuation reverse-push emission amplitude aggregation

Info

Publication number: CN108008351B
Application number: CN201711222541.9A
Authority: CN
Inventors: 徐小文
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2021-05-14
Anticipated expiration: 2037-11-29
Also published as: CN108008351A

Abstract

A signal positioning method based on forward attenuation reverse-thrust emission amplitude aggregation comprises the following steps: 1. setting a checking area, and performing mesh generation on a map of the checking area; 2. mounting signal monitoring stations in any A grids in a map grid; 3. calculating or measuring any coordinate position S in the grid_i,jTo the coordinate position S_m,nA signal space attenuation value of; 4. suppose the region is divided by S_m,nAll other grid positions may have suspected signal sources, and S_i,jAt a signal source emission amplitude of

5. If there are A transmit amplitudes at the same coordinate location, there are b transmit amplitude values at

Within the confidence interval of (2), the coordinate is considered to be f₀Suspected emission coordinates of the signal; 6. sorting all suspected emission coordinates from large to small according to the b value; the larger b, the greater the likelihood of indicating that the location is a true transmit coordinate.

Description

Signal positioning method based on forward attenuation reverse-push emission amplitude aggregation

Technical Field

The invention relates to a signal positioning method based on forward attenuation backward-pushing emission amplitude aggregation, and belongs to the field of signal monitoring.

Background

As the number of radio transmitting devices used and the density of spectral coverage increases, the electrical spectrum resources become increasingly strained. In the face of possible economic loss, even national security, it is important to accurately investigate radio signal sources or illegal stations and ensure smooth communication.

The modern radio direction finding can be roughly divided into the following four systems according to different direction finding principles: amplitude comparison method direction finding, space spectrum estimation method direction finding, arrival time difference method direction finding and an interferometer. (1) Amplitude comparison and direction finding system: the incoming wave direction is measured by using the directional characteristics of the direction-finding antenna array to receive the signal amplitude of the incoming wave in different directions. Taking the widest Watson-Watt system as an example, the system has the advantages of insensitivity to channel interference, high direction finding speed and easiness in realization, but the system has low direction finding precision and direction finding sensitivity and weak capability of resisting wave front distortion. (2) The direction finding principle of the space spectrum estimation direction finding system is as follows: the received signal of each antenna element is compared with the signals of other antenna elements, and taking a typical MUSIC algorithm as an example, the method is used for estimating the Direction of arrival (DOA), and has the advantages of high Direction finding precision, small Direction finding error, high resolution, capability of simultaneously orienting multiple signals and the like, but still has some defects, for example, when multiple incoming waves are mutually coherent, the MUSIC algorithm fails. (3) Arrival time difference direction finding: three or more than three measuring stations are used for carrying out data acquisition on the arrival time of a certain signal and carrying out positioning plane or space positioning on a target source. The direction finding accuracy is high, the direction finding speed is high, the sensitivity is high, and the method is insensitive to the measuring environment. However, the arrival time direction finding requires that the incoming wave signal is a fast time-varying signal and has a fixed modulation mode, and under the condition that the digital modulation is widely applied at present, the requirement of the incoming wave signal on the modulation mode is difficult to meet, so the application is less. (4) An interferometer: the interferometer is divided into a phase interferometer and a correlation interferometer, the phase interferometer is not provided with a pre-established sample library, and the DOA phase difference is solved; the correlation interferometer needs to establish a sample library by the azimuth angle and the pitch angle according to a certain resolution in advance, and phase difference vectors of incoming waves are compared with the sample library one by one.

With the deterioration of the electromagnetic environment, the positioning method using the above principle causes the accuracy to be reduced, the error to be increased and the positioning algorithm to be more and more complex.

Disclosure of Invention

The invention provides a signal positioning method based on forward attenuation reverse-push emission amplitude aggregation, which is used for checking a spatial unknown signal source (emission frequency f)₀) The specific location of (a). For convenience of calculation, the amplitude unit of the signals is unified to dBm; to simplify the model, the signal source is set to omni-directional transmission. The method specifically comprises the following steps:

the method comprises the following steps: setting a checking area, meshing a map of the checking area, setting the meshes to be I multiplied by J, and labeling a position coordinate S for each mesh_i,j(I is less than or equal to I, J is less than or equal to J), forming a coordinate matrix [ S ] of the area]_I,J。

Step two: and (4) installing signal monitoring stations at any A grids (namely position coordinates) (A is more than or equal to 3) in the map grids obtained in the step one. The kth monitoring station is denoted as R_k(kA) or less) and the position coordinate is S_m,n. At the monitoring station R_kMeasuring the amplitude of the signal to be

Step three: calculating or measuring any coordinate position S in the grid by using radio wave propagation method_i,jTo the coordinate position S_m,nA signal space attenuation value of

Forming all the positions of the region to S_m,nMatrix of attenuation values [ D^Rk]_I,J。

Step four: suppose the region is divided by S_m,nAll other grid positions may have suspected signal sources, and S_i,jAt a signal source emission amplitude of

Is obtained as a coordinate position S_m,nEmitting amplitude matrix at each position of region as reference point

Step five: and repeating the second step to the fourth step to obtain A transmitting amplitude matrixes of all A monitoring stations. Thus, for the same coordinate S_i,jA number of transmit amplitude values may be obtained. Average amplitude of emission

Setting an amplitude confidence coefficient delta, if A emission amplitudes at the same coordinate position exist b (b is more than or equal to 2 and less than or equal to A) emission amplitude values

Within the confidence interval of (2), the coordinate position is considered as the frequency f₀The suspected emission coordinates of the signal.

Step six: and D, sorting all suspected emission coordinates in the step five from large to small according to the b value. The larger the value of b, the greater the likelihood of indicating that the location is a true transmit coordinate.

The invention has the advantages that: the method avoids a complex passive positioning algorithm, and can realize the positioning of the suspected signal source by actually measuring the signal amplitude data through the monitoring station and combining with an attenuation value matrix obtained by a radio wave propagation algorithm.

Drawings

Fig. 1 is a schematic diagram of the mesh generation and monitoring station of the area to be investigated and the setting position of a suspected signal source.

Detailed Description

The invention provides a signal positioning method based on forward attenuation reverse-thrust emission amplitude aggregation. The present invention will be described in further detail with reference to the accompanying drawings and examples.

Step one, as shown in fig. 1, mesh division is performed on a set investigation region map, the mesh is set to 11 × 11, and a position coordinate S is marked on each mesh_i,j(i is less than or equal to 11, j is less than or equal to 11), forming a coordinate matrix [ S ] of the area]_11,11。

Step two, as shown in fig. 1, 3 grids, i.e. position coordinates S, are selected as an example_8,1，S_1,7，S_5,11Department installation signal monitoring station R₁、R₂、R₃And respectively measuring the signal amplitude of

Step three, calculating by a parabolic equation method to obtain each coordinate position S_i,jTo the coordinate position S_8,1，S_1,7，S_5,11Forming all positions of the region to S respectively_8,1，S_1,7，S_5,11Matrix of attenuation values [ D^R1]_11,11，[D^R2]_11,11，[D^R3]_11,11。

Step four, for each monitoring station, assuming that all points of the area except the position of the monitoring station are possible to have suspected signal sources, each grid S_i,jThe transmission amplitude obtained by the signal source respectively for the measured values of the monitoring station is

Thereby respectively obtaining the coordinate position S_8,1，S_1,7，S_5,11Emitting amplitude matrix at each position of region as reference point

Step five, the obtained three emission amplitude matrixes

Same coordinate S_i,jThere are 3 values of the emission amplitude, thus obtaining S_i,jAverage emission amplitude of

Setting an amplitude confidence delta if there are 3 transmit amplitudes at the same coordinate position, there are b transmit amplitude values

Within the confidence interval of (c). Whereby the position coordinate is considered as a frequency f₀The suspected emission coordinates of the signal.

And step six, sorting all the suspected emission coordinates according to the b value from large to small, wherein b is more than or equal to 2 and less than or equal to A, and in the example, A is 3, so that b is 2 or b is 3. The larger the value of b, the more likely it is that the position is the true transmit coordinate, i.e.: has 3 transmission amplitude values

Is compared with 2 transmission amplitude values

Is more likely to be the signal emission location.

The above embodiments are only used to illustrate the implementation process of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.

Claims

1. A signal positioning method based on forward attenuation reverse-push emission amplitude aggregation is characterized in that: for investigating spatially unknown signal sources, i.e. transmission frequencies f₀The specific location of the signal of (a); for convenience of calculation, the amplitude unit of the signals is unified to dBm; in order to simplify the model, a signal source is set to be omnidirectional emission; the method specifically comprises the following steps:

the method comprises the following steps: setting a checking area, meshing a map of the checking area, setting the meshes to be I multiplied by J, and labeling a position coordinate S for each mesh_i，jForm the coordinate matrix [ S ] of the area]_I，J(ii) a Wherein I is less than or equal to I, and J is less than or equal to J;

step two: mounting a signal monitoring station at any A grids, namely position coordinates, in the map grids obtained in the step one; the kth monitoring station is denoted as R_kWith a position coordinate S_m，n(ii) a At the monitoring station R_kMeasuring the amplitude of the signal to be

Wherein A is more than or equal to 3; k is less than or equal to A;

step three: calculating or actually measuring any coordinate position S in grid by radio wave propagation method_i，jTo the coordinate position S_m，nA spatial attenuation value of the signal of

Forming all the positions of the region to S_m，nMatrix of attenuation values [ D^Rk]_I，J；

Step four: suppose the region is divided by S_m，nAll other grid positions may have suspected signal sources, and S_i，jAt a signal source emission amplitude of

Is obtained as a coordinate position S_m，nEmitting amplitude matrix at each position of region as reference point

Step five: repeating the second step to the fourth step to obtain A emission amplitude matrixes of all A monitoring stations; thus, for the same coordinate S_i，jObtaining A transmitting amplitude values; average amplitude of emission

Setting an amplitude confidence degree delta, if A emission amplitudes at the same coordinate position exist b emission amplitude values

Within the confidence interval of (2), the coordinate position is considered as the frequency f₀Suspected emission coordinates of the signal; wherein b is more than or equal to 2 and less than or equal to A;

step six: sorting all suspected emission coordinates in the fifth step from large to small according to the b value; the larger the value of b, the greater the likelihood of indicating that the location is a true transmit coordinate.