Cascaded multi-dimensional radial motion feature detection method based on pulse correlation

Abstract

The invention relates to a cascaded multi-dimensional radial motion characteristic detection method based on pulse correlation. The method comprises the following steps: additionally arranging a target radial motion characteristic discrimination channel on a radar, and for an echo sample greater than a video detection threshold T, using a pulse correlation method to calculate a radial speed of each distance unit of each pulse in a coherent processing interval; judging continuity of the radial speed in the distance direction, and for the speed through a continuity judgment criterion, extractingeffective speed information and eliminating false speed information by adopting a constant false alarm detection method based on a self-adaptive threshold of background judgment; and generating a radial motion indication signal of each distance unit according to the number and distribution characteristics of effective radial speed pulses of the distance unit in the coherent processing interval, and realizing detection of a radial motion target by the radar. According to the invention, an effective means is provided for the monitoring of a moving target at a radar signal processing level, andproviding data support for the detection, tracking and automatic starting of the target.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing. Background technique [0002] As the main means of all-weather target detection and surveillance, radar is widely used in public and national defense security fields such as air and sea target surveillance and early warning detection. However, affected by the complex background environment and the complex motion characteristics of the target, the radar echo of the target is extremely weak and has complex characteristics, which makes it difficult for the detection performance of the radar to meet the actual needs of the moving target. The difficulties in detecting moving targets in a complex background are mainly manifested in: first, the target’s motion characteristics are complex, and the target usually has the characteristics of “low, small and slow”, that is, the target has the motion characteristics of low elevation angle, small size and slow speed; second, strong Clutter can...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of large storage capacity and high computational complexity in the traditional moving target detection method using moving target display cascaded Doppler filter banks, the present invention proposes a cascaded multi-dimensional radial motion feature detection based on pulse correlation method

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