Target detection method of dual-polarization receiving radar

Abstract

The invention provides a target detection method of a dual-polarization receiving radar. According to the technical schemes of the invention, the target detection method comprises the following four steps of: the first step, dual polarization receiving: a radar receives target echo signals through adopting an orthogonal dual-polarization mode; the second step, matched filtering: the matched filtering output signals of an H polarization channel and a V polarization channel are calculated; the third step, low-threshold primary detection: CFAR detection is performed on the matched filtering output signals of the H polarization channel and the V polarization channel one point by one point, and a low-threshold coefficient is adopted as a detection threshold coefficient; and the fourth step, high-threshold confirmation detection: a low-threshold detection point set is processed according to different circumstances, so that low-threshold detection points can be screened out. The target detection method of the invention has the advantages of stable performance, simplicity and practicability.

Description

technical field [0001] The invention belongs to the technical field of radar detection, and in particular relates to the target detection problem of polarized radar. Background technique [0002] The target detection methods of dual-polarization receiving radar can be mainly divided into two categories. The first category is the situation where there is prior information, that is, the situation where the polarization scattering characteristics of the target are known. The main methods include optimal polarization detectors, etc.; The second category is the situation without prior information, that is, the situation where the target polarization scattering characteristics are unknown, including polarization whitening filters, polarization constant false alarm detectors, etc. These methods mainly use the polarization covariance of the clutter signal The estimation of the matrix is ​​used to determine the weighting coefficients between the polarization channels, taking the maxi...

AI Technical Summary

Problems solved by technology

[0003] For the first type of method, it is more difficult to apply in practice because the polarization scattering characteristics of the target are unpredictable and dynamically fluctuating.

Although the second type of method can optimize the Signal-Clutter Power Ratio (Signal-Clutter Power Ratio, referred to as SCR) by estimating the polarization of the background data, its improvement of target detection performance is limited by the target polarization scattering characteristic

This dual-threshold detection method for dual-polarization receiving radar has not been reported in the literature

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