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Distributed asynchronous recursive filtering fusion based on track-before-detect technology

A technology of asynchronous iteration and fusion method, which is applied to measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc., and can solve the problem that the tracking method cannot perform distributed fusion.

Active Publication Date: 2018-01-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a distributed asynchronous iterative filter fusion method based on DP-TBD in order to improve the estimation accuracy of the target state in view of the technical problem that the multi-frame detection tracking method cannot perform distributed fusion Purpose

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  • Distributed asynchronous recursive filtering fusion based on track-before-detect technology
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  • Distributed asynchronous recursive filtering fusion based on track-before-detect technology

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Embodiment Construction

[0089] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation and accompanying drawings.

[0090] The present invention mainly adopts the method of computer simulation to verify, and all steps and conclusions are verified correctly on MATLAB-2013. The specific implementation steps are as follows:

[0091] Step S1, initialize system parameters:

[0092] Initialization variables include: total simulation time F=20; number of tracking processing frames before one detection N=6; target signal-to-noise ratio SNR=8dB; threshold of tracking processing before detection V T =13.7329; elliptical wave gate threshold γ=16; track correlation threshold 5, radar 1 period 2s, radar 2 period 3s, radar start-up time 1s, tracking processing before multi-frame detection 1st, 2nd,... , the detection probabilities of N frames are 0.806, 0.892, 0.902, 0...

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Abstract

The invention discloses a distributed asynchronous recursive filtering fusion based on track-before-detect technology, and belongs to the technical field of radar data processing. According to the invention, the method herein combines Dynamic Planing-track-before-detect (DP-TBD) algorithm and iterative filtering, and distributed asynchronous fusion algorithm, and increases the capability of DP-TBDalgorithm in detecting weak targets by conducting measurement data fusion on an iterative filter and a plurality of radars. In addition, the plurality of radars often operate at different times and have different scanning periods, which is to say that the plurality of radars have asynchronous data. According to the invention, the method herein achieves the fusion of asynchronous data of differentradars. According to the embodiments of the invention, the method herein overcomes the failure to use DP-TBD algorithm so as to conduct synergetic detection and information fusion in actual application when a plurality of asynchronous radars conduct synergetic detection, and can effectively increase the effects of tracking weak targets.

Description

technical field [0001] The invention belongs to the technical field of radar data processing, and in particular relates to the technical field of radar weak target tracking and multi-radar cooperative detection. Background technique [0002] The reduction of target flight altitude and the increasing maturity of target stealth technology have challenged the detection performance of traditional radars. Improving the detection and tracking performance of radar for faint targets has become an extremely important issue, and has attracted more and more attention. [0003] Multi-frame tracking before detection (TBD) technology is a technology for detecting and tracking weak targets in low SNR environments. This technology uses multi-frame information for target detection at the same time, which improves the detection effect of weak targets. Different from traditional detection methods, tracking before detection does not announce the detection results in a single frame, but after p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S13/58G01S7/41
Inventor 易伟李洋漾孙伟黎明孙智李雯陈璐孔令讲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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