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Distance extension target detection method and device based on clutter covariance matrix estimation

A technology of distance expansion target and covariance matrix, which is applied to radio wave measurement systems, instruments, etc., can solve the problems of low detection accuracy and detection accuracy, and low target detection performance, so as to improve detection accuracy and detection accuracy, improve Detection performance, effect of improving estimation accuracy

Active Publication Date: 2018-11-27
TSINGHUA UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a distance extension target detection method and device based on clutter covariance matrix estimation, which solves the technical problems of low target detection performance, low detection accuracy and low detection accuracy in the prior art

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  • Distance extension target detection method and device based on clutter covariance matrix estimation
  • Distance extension target detection method and device based on clutter covariance matrix estimation
  • Distance extension target detection method and device based on clutter covariance matrix estimation

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0021] figure 1 It is a schematic diagram of a distance-extended target detection method based on clutter covariance matrix estimation according to an embodiment of the present invention, such as figure 1 As shown, the embodiment of the present invention provides a range-extended target detection method based on clutter covariance matrix e...

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Abstract

The invention provides a distance extension target detection method and device based on clutter covariance matrix estimation. The method comprises inputting the obtained plurality of sets of radar echo data sub-matrices to a preset likelihood function multiplying unit model, and outputting a likelihood function of the clutter covariance matrix; inputting the plurality of sets of radar echo data sub-matrices, the likelihood function, the obtained iteration step size and the obtained weight adjustment factor to a preset iterative algorithm model, and outputting an estimated value of the cluttercovariance matrix. The distance extension target detection method and device based on the clutter covariance matrix estimation do not need auxiliary data, when parameter estimation is carried out under the non-complete observation, the likelihood function maximization and the clutter covariance matrix rank minimization, the weight is dynamically adjusted in the iterative solution process, and theestimation precision of the clutter covariance matrix is improved, so that the detection performance of the distance extension target is improved, and the detection precision and the detection accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a method and device for detecting a range-extended target based on clutter covariance matrix estimation. Background technique [0002] As a detection method, radar requires high-resolution performance in order to obtain more detailed information of the detection object. However, the characteristics of large aperture, large bandwidth, and long detection time of high-resolution radar also bring some new problems to target detection. [0003] In the prior art, on the one hand, with the continuous improvement of the radar range resolution, the distribution range of the target in the distance dimension is larger than the radar range resolution, and becomes a range extension target. At this time, the traditional point target model is no longer established, and a detection method based on the extended target model needs to be established. On the other hand, due to the ...

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Application Information

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IPC IPC(8): G01S7/292G01S7/41
CPCG01S7/2923G01S7/41
Inventor 刘一民黄天耀王希勤肖乐
Owner TSINGHUA UNIV
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