A phase-based dynamic programming tracking-before-detection method

A dynamic programming, forward tracking technology, applied in measurement devices, radio wave measurement systems, radio wave reflection/re-radiation and other directions, can solve problems such as low detection and tracking probability

Active Publication Date: 2017-08-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to improve and design a kind of phase-based dynamic programming tracking method before detection, and utilize phase information to improve the detection and tracking probability for existing dynamic programming tracking before detection when tracking Swerling 3 undulating targets. The purpose of detection and tracking performance and system stability of weak undulating targets in Swerling 3

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  • A phase-based dynamic programming tracking-before-detection method
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Embodiment Construction

[0035] The present invention selects the complex likelihood ratio as the target track value function, and the selection of the target track value function makes full use of the statistical properties of the target amplitude, the statistical properties of the noise and the target phase information. The traditional dynamic programming tracking before detection method does not use the three kinds of information of the amplitude target track value function, while the envelope log likelihood ratio uses the target amplitude statistical characteristics and noise statistical characteristics, but does not use the phase information. The invention can further improve the detection and tracking performance of the dynamic programming tracking before detection method by using the phase information.

[0036] The present invention mainly adopts the method of simulation test for verification, and all steps and conclusions are verified correctly on MATLAB R2012b. The specific implementation ste...

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Abstract

The invention provides a phase-based dynamic programming tracking before detection method, which belongs to the technical field of radar target detection and tracking, and particularly relates to the technical field of undulating target detection and tracking under the background of complex Gaussian noise. When the radar echo data is received, the phase information is used to calculate the complex likelihood ratio, and all possible tracks are searched by accumulating the complex likelihood ratio to estimate the target state. Compared with the existing dynamic programming tracking before detection algorithm, this method can better reflect the difference between the target and the noise by using the phase information, and improve the detection and tracking performance of the undulating target.

Description

technical field [0001] The invention relates to radar target detection and tracking technology, in particular to radar detection and tracking technology for weak undulating target under complex Gaussian background. Background technique [0002] With the maturity of stealth technology, the radar cross-sectional area of ​​aircraft, missiles and other targets has been reduced by one to two orders of magnitude. At the same time, it includes helicopters, small unmanned aerial vehicles, low-speed aircraft and other low-altitude slow-speed small targets. A large number of military applications, This makes it difficult to detect weak and small targets in various fields such as airborne fire control, airborne early warning, ground intelligence, and shipborne radar. Therefore, the detection and tracking of weak targets has become a technical problem that radar needs to solve urgently. [0003] The dynamic programming tracking before detection method is an effective weak target detect...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/66G06F19/00
CPCG01S13/66
Inventor 孔令讲姜海超李小龙卢术平易伟崔国龙杨晓波陈建
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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