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CN-121978621-A - Method, device, equipment and medium for positioning electromagnetic radiation source

CN121978621ACN 121978621 ACN121978621 ACN 121978621ACN-121978621-A

Abstract

The application provides a positioning method, a device, equipment and a medium for an electromagnetic radiation source, which are used for the technical field of radio monitoring and can solve the technical problem of lower accuracy of positioning the radiation source caused by inaccurate combination of multipath propagation and a receiver in the prior art. The method comprises the steps of determining a plurality of receivers to be processed according to distance values between a target receiver and other receivers, combining any receivers to be processed to obtain a plurality of receiver combinations, determining the target receiver combinations and corresponding positioning points according to geometric structures corresponding to the receiver combinations, determining the number of corresponding effective positioning points according to distance values between the positioning points and other positioning points, determining target positioning points, dividing a target distribution area according to a target distribution area to obtain a plurality of area grids, determining target area grids according to positioning point densities corresponding to the area grids, and determining target radiation positions, and accordingly improving the positioning accuracy of a radiation source.

Inventors

  • LV ZHILIANG

Assignees

  • 成都华日通讯技术股份有限公司

Dates

Publication Date
20260505
Application Date
20260228

Claims (10)

  1. 1. A method of positioning an electromagnetic radiation source, the method comprising: Determining a plurality of receivers to be processed according to the distance values between the target receiver and other receivers and a preset distance threshold, and combining any of the receivers to be processed to obtain a plurality of receiver combinations; Determining a target receiver combination and a positioning point corresponding to the target receiver combination according to the corresponding geometric structure of each receiver combination, and determining the corresponding effective positioning point number according to the distance value between each positioning point and other positioning points; Determining target positioning points according to the number of effective positioning points corresponding to all the positioning points and a preset number threshold, and performing grid division on the target distribution areas according to the target distribution areas corresponding to all the target positioning points to obtain a plurality of area grids; and determining a target area grid according to the positioning point density corresponding to each area grid, and determining a target radiation position according to the grid position corresponding to the target area grid.
  2. 2. The method of claim 1, wherein the determining a plurality of pending receivers based on the distance value between the target receiver and the other receivers and the preset distance threshold comprises: Determining a target level value with the largest value and the target receiver corresponding to the target level value according to the real-time level value corresponding to each receiver, and calculating the distance between the target receiver and other receivers according to the target receiving position corresponding to the target receiver and the receiving positions corresponding to other receivers to obtain a plurality of distance values; judging whether the distance value is smaller than the preset distance threshold value or not; if yes, determining the receiver corresponding to the distance value as the receiver to be processed; if not, determining that the receiver corresponding to the distance value is not the receiver to be processed.
  3. 3. The method of claim 1, wherein said combining any of said pending receivers to obtain a plurality of receiver combinations comprises: and determining any three receivers to be processed as one receiver combination according to all the receivers to be processed, and obtaining a plurality of receiver combinations.
  4. 4. The method of claim 1, wherein said determining the target receiver group and its corresponding anchor point based on the respective receiver group's corresponding geometry comprises: Determining a triangular structure corresponding to the receiver combination according to the corresponding positions of the receivers to be processed, and determining the target receiver combination according to the receiver combination with the corresponding triangular structure being a non-obtuse triangle; And calculating the positioning point corresponding to each target receiver combination based on a TDOA algorithm.
  5. 5. The method of claim 1, wherein the determining, for each of the anchor points, a corresponding number of valid anchor points based on the distance values between the anchor point and other anchor points, comprises: For each positioning point, determining a target distance value smaller than a preset distance threshold according to a plurality of distance values, and determining the positioning point corresponding to the target distance value as an effective positioning point corresponding to the current positioning point; And determining the number of the effective locating points according to the number of the effective locating points corresponding to each locating point.
  6. 6. The method of claim 1, wherein the determining the target area grid according to the location point density corresponding to each area grid comprises: And calculating the positioning point density corresponding to each regional grid according to the number of the target positioning points in the regional grid, the positions of each target positioning point and preset Gaussian kernel function parameters.
  7. 7. The method of claim 1, wherein determining the target radiation position from the grid position corresponding to the target area grid comprises: And determining a central position corresponding to the grid geometric center according to the grid geometric center corresponding to the target area grid, and determining the central position as the target radiation position.
  8. 8. A positioning device for an electromagnetic radiation source, said device comprising: The combining module is used for determining a plurality of receivers to be processed according to the distance value between the target receiver and other receivers and a preset distance threshold value, and combining any receivers to be processed to obtain a plurality of receiver combinations; The quantity determining module is used for determining a target receiver combination and a locating point corresponding to the target receiver combination according to the geometric structure corresponding to each receiver combination, and determining the quantity of corresponding effective locating points according to the distance value between the locating point and other locating points for each locating point; The dividing module is used for determining target positioning points according to the number of the effective positioning points corresponding to each positioning point and a preset number threshold value, and dividing the grids of the target distribution areas according to the target distribution areas corresponding to all the target positioning points to obtain a plurality of area grids; And the position determining module is used for determining a target area grid according to the positioning point density corresponding to each area grid and determining a target radiation position according to the grid position corresponding to the target area grid.
  9. 9. A computer device, comprising: One or more processors; A memory; One or more programs, wherein the one or more programs are stored in memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 1-7.
  10. 10. A computer readable storage medium having stored therein program code which is callable by a processor to perform the method according to any one of claims 1 to 7.

Description

Method, device, equipment and medium for positioning electromagnetic radiation source Technical Field The present application relates to the field of radio monitoring technologies, and in particular, to a method, an apparatus, a device, and a medium for positioning an electromagnetic radiation source. Background In the radio monitoring scenario, time-difference positioning (TIME DIFFERENCE of Arrival, TDOA) is a classical method of positioning a radio signal source, and by estimating the inter-spectral phase slope of the synchronous received signals of 2 receivers, the propagation time difference of the signal source to 2 receivers can be solved. The TDOA utilizes the signal source propagation arrival time difference estimated by the inter-spectrum phase slope among a plurality of receivers to draw a plurality of time difference curves on a map, and then solves the nearest coordinates of each time difference curve by least square to obtain the signal source position. In the existing positioning method of the electromagnetic radiation source based on time difference positioning, because complex urban environments are high-rise and dense, signal propagation paths are not only straight paths from the signal source to the receivers, but also a plurality of catadioptric paths exist, the phenomenon of common-frequency multipath exists in the received signals, the slope estimation of the cross spectrum phase is caused to generate errors, time difference calculation errors are caused, and a positioning calculation point is caused to jump, and for a plurality of receivers with fixed positions, the propagation paths (including catadioptric paths) from the signal source to the receivers are relatively fixed, so that the system positioning errors are basically stable, and the errors cannot be offset in a mode of averaging through multiple measurements. Therefore, the existing positioning method of the electromagnetic radiation source has the problem of low positioning efficiency and accuracy. Disclosure of Invention The application provides a positioning method, a device, equipment and a medium for an electromagnetic radiation source, which are used for solving the problems of low positioning efficiency and low accuracy of the existing positioning method for the electromagnetic radiation source. In a first aspect, the present application provides a method of positioning an electromagnetic radiation source, the method comprising: determining a plurality of receivers to be processed according to the distance values between the target receiver and other receivers and a preset distance threshold, and combining any receivers to be processed to obtain a plurality of receiver combinations; Determining a target receiver combination and a corresponding positioning point thereof according to the corresponding geometric structure of each receiver combination, and determining the corresponding effective positioning point number according to the distance value between the positioning point and other positioning points aiming at each positioning point; determining target positioning points according to the number of effective positioning points corresponding to all positioning points and a preset number threshold value, and carrying out grid division on a target distribution area according to target distribution areas corresponding to all the target positioning points to obtain a plurality of area grids; And determining a target area grid according to the density of positioning points corresponding to each area grid, and determining a target radiation position according to the grid position corresponding to the target area grid. In some embodiments of the present application, determining a plurality of receivers to be processed according to a distance value between a target receiver and other receivers and a preset distance threshold value includes: Determining a target level value with the largest value and a target receiver corresponding to the target level value according to the real-time level value corresponding to each receiver, and calculating the distance between the target receiver and other receivers according to the target receiving position corresponding to the target receiver and the receiving positions corresponding to other receivers to obtain a plurality of distance values; Judging whether the distance value is smaller than a preset distance threshold value or not; If yes, determining the receiver corresponding to the distance value as a receiver to be processed; If not, the receiver corresponding to the distance value is determined not to be the receiver to be processed. In some embodiments of the present application, combining any of the receivers to be processed to obtain a plurality of receiver combinations includes: And determining any three receivers to be processed as one receiver combination according to all the receivers to be processed, and obtaining a plurality of receiver combinations. In some embodiments