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All Bregman divergence-based radar object detection method

A radar target and detection method technology, which is applied in the field of signal detection, can solve the problems that the radar target detection performance needs to be improved, and achieve the effects of avoiding detection performance loss, simple detection process, and good detection performance

Active Publication Date: 2017-11-24
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] Aiming at the problem that radar target detection performance needs to be improved in the prior art, the present invention proposes a matrix constant false alarm rate detection method based on full Bregman divergence

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  • All Bregman divergence-based radar object detection method
  • All Bregman divergence-based radar object detection method
  • All Bregman divergence-based radar object detection method

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Embodiment Construction

[0033] The experimental results will be described in detail below in conjunction with specific embodiments.

[0034] Firstly, explain in detail: take the covariance matrices in P (P≥2) distance units on the left and right sides of the i-th distance unit in the l-th cluster of echo signals to form a matrix set. This matrix set is taken as follows:

[0035] When 1≤i≤P, the matrix set is {R l,1 , R l,2 ,...,R l,i-1 , R l,i+1 , R l,i+2 ,...,R l,2P+1};

[0036] When Pl,i-P , R l,i-P+1 ,...,R l,i-1 , R l,i+1 , R l,i+2 ,...,R l,i+P};

[0037] When I-Pl,I-2P , R l,I-2P+1 ,...,R l,i-1 , R l,i+1 , R l,i+2 ,...,R l,I}.

[0038] Figure 2 to Figure 5 is the result of the first simulation experiment, which uses the full Bregman divergence distance and the existing Riemann distance to calculate the distance of the radar echo signal in each range cell.

[0039]The specific steps are: calculate the covariance matrix R for the pulse data in the i-th distance unit in the l-t...

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Abstract

The invention puts forward an all Bregman divergence-based matrix constant false alarm rate detection method. A technical solution of the method comprises the following steps: a radar echo signal in each range cell is modeled into a Hermite positive definite matrix, all Bregman divergence distance between mid-values of the matrix in each range cell and corresponding matrixes of neighboring cells thereof is calculated, and whether an object exists is determined after the all Bregman divergence distance is compared with a set threshold value. The method disclosed in the invention is simple in principles and small in calculation amount, the method is not sensitive to noise particularly in conditions of large background clutters, and the method is high in detection performance.

Description

technical field [0001] The invention relates to the field of signal detection, in particular to radar target detection technology, and more specifically to a radar target detection method based on full Bregman divergence. Background technique [0002] Radar target detection is the process of judging the existence of the target of interest by using the information in the radar echo signal. The classic Doppler processing-based cell-average constant false alarm rate detector (M.A.Richards, Fundamentals of Radar Signal Processing, Second Edition, McGraw-Hill, 2014) performs fast Fourier transform processing on echo slow time-dimensional data , take the maximum value or the sum of several maximum values, perform linear filtering or square law filtering on the processed data, and finally perform unit average constant false alarm rate on the filtered data. For pulse Doppler radar data, the radar echo is generally composed of multiple coherent pulses, and the echo not only contains...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 程永强华小强王宏强秦玉亮李宇波
Owner NAT UNIV OF DEFENSE TECH
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