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Broadband radar target adaptive fusion detection method based on skew-symmetry structure

A broadband radar and detection method technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of large space span of distance expansion targets and lack of auxiliary data, etc., to improve estimation accuracy and distance expansion target detection performance, and improve threshold calculation Accuracy, avoiding the effect of excessive calculation

Active Publication Date: 2018-11-30
NAVAL AVIATION UNIV
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Problems solved by technology

Compared with the point target, the spatial span of the distance expansion target is larger, and the possibility of missing auxiliary data is greater, and the degree of missing is more serious

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  • Broadband radar target adaptive fusion detection method based on skew-symmetry structure
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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The embodiments of the present invention are used to explain the present invention, rather than to limit the present invention. Within the spirit of the present invention and the scope of protection of the claims, any modifications and changes made to the present invention fall within the protection scope of the present invention.

[0029] Refer to the attachedfigure 1 , the specific embodiment of the present invention is divided into the following steps:

[0030] Step 1: Obtain the pure clutter auxiliary data adjacent to the distance unit to be detected by irradiating the target-free range around the area to be detected, and form R auxiliary data vectors x m ,m=1,2,...,R, L data vectors z to be detected are formed by the echo complex amplitudes of L distance units to be detected t , t=1,2,...,L, and send the data vector to be detected and the reference data vector to t...

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Abstract

The invention discloses a broadband radar target adaptive fusion detection method based on a skew-symmetry structure, belonging to the field of radar signal processing. Aiming at a broadband radar system for which auxiliary data is missing and a space symmetric linear array or a fixed coherent pulse recurrence interval is used, clutter background statistical characteristics are estimated through clutter covariance matrix skew-symmetry structured information in main data and the auxiliary data, target scattering point energy in all to-be-detected distance units is fused based on a one-step process generalized likelihood ratio detection criterion, the clutter information in the main data and the auxiliary data is used maximally, a broadband target skew-symmetry structured adaptive detector is designed, false alarm probability and detection probability analytical expression of the detector are derived, mathematical tool support is provided for detector threshold value setting and detection performance theoretical analysis, range spread target adaptive detection performance under an environment where the auxiliary data is missing is improved, and the method has a popularization and application value.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a wideband radar target adaptive fusion detection method based on an oblique symmetric structure. Background technique [0002] Compared with traditional low-resolution narrowband radar, wideband radar has larger bandwidth and higher distance resolution, and has obvious advantages in anti-jamming, anti-reconnaissance, precise detection and imaging, high-precision tracking, and target recognition. It has gained wide attention and application in modern military and civilian fields, and has become an important direction of modern radar development. Due to the low range resolution of traditional narrowband radars, the range unit size is much larger than the geometric size of common targets. The target echo signal only occupies one range unit, and the actual target is often treated as a "point target". Different from the "point target" of narrowband radar, the echo ...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41G01S7/414
Inventor 简涛何友王海鹏熊伟但波夏沭涛郭小康
Owner NAVAL AVIATION UNIV
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