Radar echo double-component mixed amplitude distribution model parameter estimation method and device

A technology of amplitude distribution and radar echo, applied in radio wave measurement systems, instruments, etc., can solve the problems of low modeling accuracy of trailing area and complex parameter estimation calculation.

CN111830479AActive Publication Date: 2020-10-27NAVAL AVIATION UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-10-27

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Abstract

The embodiment of the invention provides a radar echo double-component mixed amplitude distribution model parameter estimation method. The method comprises the following steps of: estimating model parameters of each component in a double-component mixed model according to radar echo data; obtaining an empirical CCDF based on a histogram statistical method, and obtaining an initial theoretical CCDFof the echo data according to the estimated model parameters and initial weighting coefficient of each component; determining a CCDF interval range of the echo data, counting all quantiles of the empirical CCDF and the initial theoretical CCDF in the CCDF interval range, and calculating an error between the quantiles; adding a preset step length to the initial weighting coefficient to obtain a new weighting coefficient until the weighting coefficient exceeds a preset range; and taking the weighting coefficient corresponding to the minimum error value as the optimal weighting coefficient of the double-component mixed amplitude distribution model. The method is simple in operation, avoids local optimization, improves the modeling precision of a trailing region, and can be used for radar target detection under the clutter background.
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Description

technical field

[0001] Embodiments of the present invention relate to the technical field of radar signal processing, in particular to a method and device for estimating parameters of a radar echo dual-component mixed amplitude distribution model, which can be used for radar target detection in a clutter background. Background technique

[0002] The radar echo amplitude distribution model describes the time-domain statistical fluctuation characteristics of radar clutter, target echo, and superimposed echo of target echo and clutter. In the field of radar signal processing, it is of great theoretical and practical value to establish an accurate radar echo amplitude distribution model. For shore-based, ship-borne, airborne and other fixed or moving platform radars, the radar echo amplitude distribution model is the main basis for the selection of Constant False-Alarm Rate (CFAR) detection method and threshold setting. For Synthetic Aperture Radar (SAR) on airborne, spaceborne...

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Embodiment Construction

[0064] 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 creative efforts fall within the protection scope of the present invention.

[0065] Combine below figure 1 Describe the method for estimating the parameters of the radar echo two-component mixed amplitude distribution model in the embodiment of the present invention, the method includes: S101, according to the echo data received by the radar, the model parameters of each component in the radar echo two-component mixed ampl...