Micro-motion characteristic cognition extraction method for rotating symmetrical object

Abstract

The invention provides a micro-motion characteristic cognition extraction method for a rotating symmetrical object. The method comprises the steps of a first step, acquiring object scattering point distance track information by means of a track-before-detect method; a second step, fitting a micro-motion parameter by means of the distance track information, and on the contrary, updating a state transfer set function in a track-before-detect process according to a micro-motion parameter estimation result; and a third step, comprehensively considering a setting and determining principle at two aspects of object detection and micro-motion characteristic extraction, thereby determining whether an object detection and micro-motion characteristic extraction task is finished. The micro-motion characteristic cognition extraction method can simultaneously realize object micro-motion characteristic extraction in performing detection and tracking on an object and furthermore improves radar working efficiency.

Description

A Cognitive Extraction Method of Micro-motion Feature of Rotational Symmetry Target technical field The invention relates to signal and information processing technology, in particular to a method for cognitively extracting micro-movement features of a rotationally symmetrical target. Background technique Since Chen V. C. introduced the micro-Doppler concept into the field of radar detection, the micro-motion feature extraction of radar targets has attracted extensive attention from scholars at home and abroad. Zhuang Zhaowen et al. mentioned in "Research Progress on Micro-motion Characteristics of Targets" (Acta Electronics, 2007, 35(3): 520-525) that micro-motion characteristics are generally considered to be the unique motion characteristics of radar targets. Using high-resolution radar Extracting this kind of fine motion features with modern signal processing technology can provide a new way for radar non-cooperative target detection and recognition. Gao H. W. et al. ...

AI Technical Summary

Problems solved by technology

If it is possible to introduce rotationally symmetrical target micro-motion feature extraction processing in the pre-detection tracking process, and use the target motion trajectory to extract micro-motion features, in turn, according to the extraction results of micro-motion features to guide the state transition set in the pre-detection tracking process, it is expected to be significantly improved. Improve computing efficiency and resource utilization, and realize the detection and micro-motion feature extraction of rotationally symmetrical targets at the same time. However, there are still problems in how to realize the target micro-motion feature extraction while the radar can detect and track the target.

Images