Particle filtering fusion method for short track obtained through multi-frame tracking-before-detection

A technology of particle filter and fusion method, which is applied in the field of radar data processing and radar weak target tracking, and can solve the problem that the complete track of the target cannot be provided.

Active Publication Date: 2018-02-02
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to propose a filter fusion method for processing the short track obtained by tracking before multi-frame detection, improve the estimation accura

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  • Particle filtering fusion method for short track obtained through multi-frame tracking-before-detection
  • Particle filtering fusion method for short track obtained through multi-frame tracking-before-detection
  • Particle filtering fusion method for short track obtained through multi-frame tracking-before-detection

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Embodiment

[0063] The present invention mainly adopts the method of computer simulation to verify, and all steps and conclusions are verified correctly on MATLAB-R2010b. see figure 1 , the specific implementation steps are as follows:

[0064] Step 1. Variable initialization:

[0065] The initialization variables include: the total simulation time K=20; the number of tracking processing frames before a detection N=6; the target signal-to-noise ratio SNR=12dB; the threshold of tracking processing before detection V T = 13.2847; possible range of tracking measurements before detection γ = 7 2 ; The detection probabilities of the 1st, 2nd, ..., N frames of a multi-frame detection pre-tracking process are 0.876, 0.892, 0.918, 0.910, 0.908, 0.838 respectively; the radar scan period T = 1s; the number of particles N s =8000; the distance range of x and y direction is [1,150]; the speed range of x and y direction is [3.7,4.4]; the target state transition matrix observation matrix Process...

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Abstract

The invention discloses a particle filtering fusion method for a short track obtained through multi-frame tracking-before-detection, which belongs to the technical field of radar data processing. A short track obtained through multi-frame tracking before detection is further processed, in order to track a target for a long time and to solve the technical problem that the multi-frame tracking-before-detection method cannot provide the complete track information of the target. Moreover, the state of the target is iteratively estimated in real time, and the state of the target is filtered and fused according to the short track obtained through multi-frame tracking before detection, in order to improve the accuracy of target state estimation and make full use of the repeated information not fully utilized in an iterative sliding window. Through particle state prediction, the problem of missing detection in tracking-before-detection of a dim target with low signal-to-noise ratio is solved,and the continuity of the track is ensured.

Description

technical field [0001] The invention belongs to the technical field of radar data processing, in particular to the technical field of radar weak target tracking. Background technique [0002] As we all know, the increasingly complex radar detection environment and the increasingly mature target stealth technology make it more difficult for radar to detect faint targets submerged in strong clutter in a timely and reliable manner. Improving the detection and tracking performance of radar for weak targets has important theoretical value and practical significance. [0003] Tracking-before-detection technology is a technique for detecting and tracking weak targets in low signal-to-noise ratio environments. Different from the traditional detection method, the tracking before detection does not announce the detection result in a single frame, but announces the detection result and track of the target at the same time after processing the multi-frame data. The methods to implemen...

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Application Information

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IPC IPC(8): G01S13/66G01S13/88
CPCG01S13/66G01S13/88
Inventor 易伟李洋漾李雯黎明孙智李固冲孔令讲崔国龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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