Matching method for two-dimensional envelope information of radar target distance and orientation and application thereof

Abstract

The invention relates to a matching method for two-dimensional envelope information of a radar target distance and an orientation, wherein a template is represented as m1, m2, m3...mn, and a waveformis represented as s1, s2, s3...sn; The method includes the following steps: (1) si / mi is calculated; (2) normalization treatment is performed, pi=si / mi / max(si)*max(mi); (3) calculating dpi=abs(pi-1),the closer the dpi is to zero, the higher the matching degree is with the template; (4) high and low double thresholds TH and TL are arranged, the number of points exceeding the TH is HCount, the number of the points between the TH and the TL is LCount; and (5) according to a preset threshold (M, N), matching of the template is completed: if the HCount<=M and the LCount<=N, it is considered as a matched target echo waveform modulated by a beam direction ; if the HCount>M or the LCount>N, then it does not match; and the thresholds are summarized as: ( the TH, the HCount, the TL, and the LCount).

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a matching method and application of two-dimensional envelope information of radar target distance and azimuth. Background technique [0002] At present, various kinds of interferences against radar emerge in an endless stream. These interferences greatly affect the detection of radar targets. In order to counter interference, traditional radars use the cooperation of auxiliary antennas to derive various coping algorithms, so as to eliminate interference. In order to make the gain of the omnidirectional auxiliary antenna cover the sidelobe of the main antenna as much as possible without affecting the detection of the target, the traditional radar antenna design will appropriately increase the gain of the auxiliary antenna. Therefore, for active deception jamming, traditional anti-jamming measures will Use sidelobe concealment, that is, use the amplitude of the m...

AI Technical Summary

Problems solved by technology

In order to make the gain of the omnidirectional auxiliary antenna cover the sidelobe of the main antenna as much as possible without affecting the detection of the target, the traditional radar antenna design will appropriately increase the gain of the auxiliary antenna. Therefore, for active deception jamming, traditional anti-jamming measures will Use sidelobe concealment, that is, use the amplitude of the main and auxiliary channels to compare the amplitude, so as to hide the interference from the sidelobe. However, in actual work, the echo amplitude of the auxiliary antenna in some directions will still exceed the echo from the sidelobe of the main antenna. wave amplitude, in order to better hide false targets, the conventional method is to increase the shadow threshold so that the amplitude of the omnidirectional auxiliary antenna can cover the sidelobe envelope, but this causes the target with a lower amplitude to do sidelobe concealment The shadow time will also be hidden, and the radar power range will be shortened. Therefore, it is urgent to use a new method to deal with the active deception jamming non-destructively in view of the existing problems.

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