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Maneuvering target multi-frame track-before-detect method applied to pulse-Doppler radar

A pulse Doppler and maneuvering target technology, applied in the field of pulse Doppler radar maneuvering target tracking before detection, can solve the problems of performance degradation, restrict application, affect the performance of maneuvering and non-maneuvering target detection and tracking, and improve adaptability Effect

Active Publication Date: 2016-09-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, this method needs to rely on a strict model assumption, that is, the target needs to maintain a constant radial velocity at all times. When the target has certain maneuvering characteristics, the performance of this method will be severely degraded due to the mismatch of the target motion model
In order to alleviate this problem, the literature proposes to improve the adaptability to maneuvering targets by expanding the search range, but this strategy will introduce a large number of noise states in the signal accumulation process, and affect the detection and tracking performance of maneuvering and non-maneuvering targets at the same time, Seriously restricts the application of this method in real scenarios

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  • Maneuvering target multi-frame track-before-detect method applied to pulse-Doppler radar

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Embodiment Construction

[0027] Specific implementation plan

[0028] The present invention mainly adopts computer simulation method for verification, and all steps and conclusions are verified correctly on MATLAB-R2012b. The specific implementation steps are as figure 1 As shown, the target scene is figure 2 Shown:

[0029] Step 1. Initialize system parameters:

[0030] Initialization system parameters include: radar range resolution Δ r =20m; Radar Dopplerway resolution Δ d =9.766m / s; the number of radar range resolution units N r =500; the number of radar Doppler-dimensional resolution units N d =64; Inter-frame interval T=1.8s; Total number of observation frames K=10; Detection threshold V T =24.316; current frame number k=1;

[0031] Step 2. Initialize model parameters:

[0032] Initialization model parameters include: target maneuvering frequency parameter α = 0.2; "current" statistical maneuvering target model parameter matrix

[0033]

[0034]

[0035] Where q 11 =(1-e -2αT +2αT+2α 3 T 3 / 3 - 2α 2 T 2...

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Abstract

The invention provides a maneuvering target multi-frame track-before-detect method applied to a pulse-Doppler radar, which can carry out real-time estimation on the target radial acceleration and the current acceleration mean value by using Doppler information of a state in an accumulating path during a dynamic planning value function accumulation process. Thus, the adaptability of the dynamic planning track-before-detect method to the maneuvering target can be effectively improved. In addition, estimation on the target radial acceleration and the current acceleration mean value is guided by measurement and can be adaptively completed, and specific target prior information is not needed.

Description

Technical field [0001] The invention belongs to the field of radar target detection and tracking, and particularly relates to a pulse Doppler radar mobile target tracking technology before detection. Background technique [0002] Different from the traditional detection and tracking technology, the tracking before detection technology does not announce the detection results for a single frame of scanned data, but processes multiple frames of data jointly, and uses the difference in the correlation between the target and noise / clutter to achieve the target Effective accumulation of signal and suppression of noise / clutter. This multi-frame joint processing method can significantly improve the detection performance of weak targets. Among them, the pre-detection tracking method based on dynamic programming has the advantages of robust performance, good real-time performance, and easy implementation. It has received extensive attention in the detection and tracking fields of weak tar...

Claims

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Application Information

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IPC IPC(8): G01S13/72G01S13/58G01S7/41
CPCG01S7/415G01S13/58G01S13/723
Inventor 易伟方梓成王经鹤谌振华孔令讲崔国龙杨晓波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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