Method for rejecting false target in real time in multi-motion-target scene by wall-through detection radar

Abstract

The present invention provides a method for rejecting a false target in real time in a multi-motion-target scene by a wall-through detection radar. Firstly, on the basis of analyzing the reason of generating a false target, a characteristic that a false target motion has incoherence and a characteristic that a real target has relevance in time and space are obtained, thus the appropriate distance of the real target motion at an adjacent time is determined; then the target tracking is realized through an algorithm based on a Kalman filter, and the optimal estimation position of each motion target in a next time is rapidly and accurately predicted; finally, through a rejecting false targe algorithm based on a threshold, the false target is accurately rejected while the target tracking is realized. The method is simple, the execution efficiency is high, the method is suitable for the real-time rejection of the false target by a portable wall-through radar, a strong guarantee is provided for the accurate tracking of each motion target, and the working efficiency of the wall-through radar can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of through-wall radar, in particular to a new algorithm for real-time elimination of false targets in a multi-moving target scene. Background technique [0002] Through-the-wall radar is a new technology under development, which can be widely used in military, anti-terrorism, disaster relief, medical treatment, security, security inspection and other fields. In order to promote the practical application of through-wall radar technology, technical problems such as target detection and positioning, false target elimination, imaging and real-time search and tracking of multi-moving targets must be solved. Among them, real-time search and tracking of multi-moving targets is the key technology of the through-wall radar system, which determines the tracking strategy of the through-wall radar for each target's trajectory, and directly affects the overall performance of the through-wall radar. One of the key techno...

AI Technical Summary

Problems solved by technology

At the same time, according to the target detection principle of the through-wall radar, in the scene of multiple moving targets, due to the complex composition of the echo signal of the through-wall radar, especially the echo signals of each target interfere with each other after multiple reflections, resulting in the generation of false targets. The echo signal components are more complex, and the real target is submerged in it, making it difficult to detect the real target

The existence of false targets brings fatal harm to the real-time automatic tracking and searching of targets.

[0004] In order to solve the problem of false target elimination in target search and tracking, some scholars at home and abroad have proposed a technical idea of ​​adding antennas to form an antenna array. Although the solution formed based on this idea has obvious advantages in the elimination of false targets in principle, However, in actual implementation, it will bring a series of problems such as echo data fusion under multi-antenna, suppression of signal crosstalk between antennas, imaging and hardware design, etc., especially greatly increasing the calculation amount of signal processing. It is extremely disadvantageous to realize the real-time search and tracking of multiple targets

At the same time, in the actual measurement process, there may be situations such as the appearance of a new target, a certain target being blocked, a target separation, and a certain target disappearing, which will make it more difficult for the through-wall radar to eliminate false targets.

Images