Method of identifying spatially scattered fixed clutter based on plot location aggregation
A technology of aggregation recognition and dot tracking, which is applied in the direction of radio wave reflection/re-radiation, measuring device, radio wave measurement system, etc., can solve the problem of high misidentification rate, achieve low misidentification rate, high real-time performance, and reduce system cost effect
Active Publication Date: 2018-10-12
CNGC INST NO 206 OF CHINA ARMS IND GRP
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[0012] 2) The misrecognition rate is high, especially for tangential flying targets
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[0040] 1) When new trace data is received, it is first judged whether the pitch value of the trace data is less than a preset maximum pitch threshold value, where the preset maximum pitch threshold value is 10 degrees;
[0041] 2) Judging whether the linked list of the center-focused clutter area is empty (the linked list is empty during initialization), if the current linked list of the center-focused clutter area is not empty, then execute step 3; otherwise, execute step 6;
[0042] 3) Cycle according to the number of center clutter areas;
[0043] 4) For a certain center-focus clutter area, judge whether the position difference between the received dot trace and the current aggregation centroid point of the center-focus clutter area is less than the preset threshold value (take 200 meters), if less than the threshold value, go to step 5; otherwise, go to step 7;
[0044] 5) Update the current focus clutter area. Weight the point trace and the position of the current aggre...
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The invention relates to a method of identifying spatially scattered fixed clutter based on plot location aggregation. The method of identifying spatially scattered fixed clutter based on spot location aggregation includes the steps: taking all the plots acquired by the first time of scanning as initial values, and after obtaining the data of the second time of scanning, delimiting a spatial range; determining whether the spatial distance between every two of all the plots of the two times of scanning falls within the preset range, and if so, establishing a clutter center by means of the two times of plot data, wherein the position of the clutter center is obtained through centroid weighting at the positions of the two plots; by parity of reasoning, after the data of each new time of scanning arrives, the above determination and processing are performed to determine whether the new scanning data is successfully associated with the existing clutter center; and once the association is successful, solving the clutter centroid through weighting. Therefore, through multiple times of scanning, the method of identifying spatially scattered fixed clutter based on plot location aggregationcan effectively obtain the fixed clutter center distribution situation, and can determine whether the newly arrived plot is a fixed clutter, thus obtaining a reliable identification result.
Description
technical field [0001] The invention belongs to the field of air defense intelligence radar, and in particular relates to a method for identifying spatially dispersed fixed clutter based on spot position aggregation and applied to intelligence radar. Background technique [0002] Judging from the actual engineering application of current air defense intelligence radars, based on new technologies and applications, the detection performance of the latest generation of air defense intelligence radars for low-altitude targets has been greatly improved compared with conventional intelligence radars. Strong ground clutter, target-like clutter, and noise, etc., even after the above clutter and noise are processed by clutter maps and constant false alarms in the radar signal processing, the primary point trace data output inevitably still There is a large amount of residual clutter. After entering the radar data, it will cause a sharp increase in false tracks, and in severe cases, i...
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IPC IPC(8): G01S13/02
CPCG01S13/02
Inventor 蔡兴雨高恒臧会凯董国任伦朱思桥
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP