Sight angle-based multi-station radar multi-target data association method
A technology of data association and line of sight angle, applied in the field of radar, can solve problems affecting the accuracy of target data association and achieve the effect of improving accuracy
Active Publication Date: 2021-10-22
XIDIAN UNIV +1
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This invention can use the angle measurement of the target relative to the observation station to complete the data association of the target, and finally estimate the position of the target. The method is simple and the effect is good, but in the process of completing the data association of the target based on the angle, it is through Divide the observation area into a certain range of grids, each grid center represents a position coordinate in the observation area, and then calculate the angle information of each grid center relative to the observation station, and then obtain the observed target angle information and The error of each grid center relative to the angle information of the observation station is obtained by obtaining the cost matrix C to complete the data association of the target. This method needs to pass Reduce the number of observation area divisions to reduce the dimension of the cost matrix C, which will affect the accuracy of the target data association
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[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0053] refer to figure 1 , the present invention comprises the following steps:
[0054] Step 1) Construct the multi-target correlation scenario of the multi-station radar system:
[0055] Construct including multi-station radar system and M targets distributed in three-dimensional space T={T 1 , T 2 ,···,T m ,···,T M}’s multi-station radar multi-target association scenario, the multi-station radar system includes a signal fusion center and N radars Z={z 1 ,z 2 ,···,z n ,···,z N},z n The position coordinate in the earth coordinate system C is u sn =(λ sn ,φ sn ,h sn ), the beamwidth of the antenna is B n , where, M≥2,T m Indicates the mth target, N≥2, z n Denotes the nth radar, λ sn , φ sn 、h sn Respectively represent z n Longitude, latitude, and altitude in the geodetic coordinate system C;
[0056] In this embod...
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The invention provides a sight angle-based multi-station radar multi-target data association method. The method comprises the implementation steps of constructing a multi-target association scene of a multi-station radar system; constructing a conversion matrix; acquiring position coordinates of each radar in an earth rectangular coordinate system ECEF; calculating an azimuth angle and a pitch angle of a sight line where a target echo received by each radar is located under an earth rectangular coordinate system ECEF; calculating the minimum distance between the target echo sight lines of every two radars and the beam width of the target echo of the radar at the position of the minimum distance; and enabling the signal fusion center to obtain a multi-station radar multi-target association result. According to the method, the minimum distance between the sight lines is calculated by using the angle information of the target echo sight lines, and through comparison between the minimum distance and the beam width at the nearest point, the association problem of the target echoes in a multi-station radar multi-target scene is solved, and the accuracy of target data association is improved.
Description
technical field [0001] The invention belongs to the technical field of radar, and relates to a multi-station radar multi-target data association method, in particular to a multi-station radar multi-target data association method based on line-of-sight angles. Background technique [0002] Radar multi-target data association is to classify and classify the measurement information of multiple targets in the multi-target scenario, so that the radar can accurately use the measurement information of multiple targets to complete the positioning and tracking of the target. Therefore, if In order to improve the positioning and tracking accuracy of the target, it is an indispensable condition to be able to complete the correct target association. [0003] Radar multi-target data association includes single-station radar multi-target data association and multi-station radar multi-target data association. In a single radar multi-target scenario, if the radar is a three-coordinate rada...
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Login to View More IPC IPC(8): G01S13/72
CPCG01S13/726
Inventor 周生华王林海苟铭江邢笑宇
Owner XIDIAN UNIV