Multi-target point trajectory gathering method for forming target point trajectory

Abstract

The invention provides a multi-target point trajectory gathering method for forming a target point trajectory, and aims to provide a multi-target point trajectory gathering method which can be used to effectively separate multiple targets, eliminate interference signals, and accurately form a target point trajectory. The method of the invention is realized by the following technical scheme: after a response signal is received by an interrogation antenna, an interrogator separates overlapping signals based on the sum-difference ratio and the amplitude difference between the front and back edges of signal pulse, and the interrogator uses the amplitude ratio SDR of sum and difference signals to eliminate sidelobe interference signals and part of multipath interference signals according to the characteristics of an antenna pattern; whether two framework pulses are overlapping pulses is judged, and the over-wide pulse of which the front and back edges are inconsistent in amplitude is separated into two framework pulses; a set of data with correct framework and low confidence is decoded; and finally, multiple interrogation results of the same target within the scope of one beam are gathered by a density point trajectory association method. By adopting the method of the invention, the problem that it is impossible to identify all targets as the targets are too dense is solved.

Description

technical field [0001] The present invention relates to a method for agglomerating multi-target traces in a friend-or-foe identification system. More specifically, the present invention is a friend-or-foe identification method for accurate identification of multiple targets by adopting techniques such as eliminating interference, measuring angles, and spot correlation. Background technique [0002] The early identification friend or foe system can only be used in conjunction with radar. After the radar finds the target, it will inquire and identify it according to the azimuth and distance of the target. Over-The-Horizon Radar (OTHR) utilizes the ionosphere's reflection effect on high-frequency electromagnetic waves to achieve target detection. Due to the complexity of the structure of the ionosphere, electromagnetic waves often have multiple propagation modes between the radar and the target. It causes a target to generate multiple measurement signals on the radar, which ma...

AI Technical Summary

Problems solved by technology

When the interrogator interrogates multiple targets, within the range of a beam, the response signals of multiple targets will enter the interrogator at the same time, and the response signals will overlap or be too close to each other. The response signal pulse of the frame signal may be timed to meet the requirements of the frame signal, and thus be misjudged as a new target

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