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A hypersonic platform clutter suppression and moving target imaging method

A moving target, hypersonic technology, applied in the field of radar, can solve the problem of inaccurate estimation of moving target parameters, and achieve the effects of reducing the performance of clutter suppression, improving the signal-to-noise ratio, and improving the estimation accuracy.

Active Publication Date: 2019-07-09
XIDIAN UNIV
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Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the present invention proposes a hypersonic platform clutter suppression and moving target imaging method, which can effectively solve the problems of existing methods of clutter suppression and moving target parameter estimation inaccuracy, and improve hypersonic platform radar Excellent clutter suppression performance, improving the signal-to-noise ratio of moving targets

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Embodiments of the present invention provide a hypersonic platform clutter suppression and moving target imaging method, such as figure 1 As shown, the method includes the following steps:

[0034] Step 1. The radar receiver obtains the echo signal of the kth receiving antenna, performs fast time-dimensional Fourier transform on the echo signal of the kth receiving antenna, and obtains the distance frequency domain echo signal of the kth receiving anten...

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Abstract

The invention belongs to the technical field of radar, and discloses a clutter suppression and moving target imaging method for a hypersonic platform. The method comprises the following steps: obtaining the echo signal of each receiving antenna; carrying out pulse compression and azimuth de-chirp compression to get range domain-azimuth compression frequency domain echo signals; coarsely searching for the radial velocity for the first time, and getting a moving target steering vector and a stationary clutter steering vector; calculating an optimal weight vector and suppressing clutter to get moving target echo data; carrying out simplified Radon transform to get the accurate estimated value of radial velocity; and accurately compensating the radial velocity to get a moving target image. The problem that the existing method is inaccurate in clutter suppression and moving target parameter estimation is solved. The clutter suppression performance of hypersonic platform radar is improved. The signal-clutter-noise ratio of a moving target is increased.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a hypersonic platform clutter suppression and moving target imaging method, which is used for hypersonic platform multi-channel radar clutter suppression and moving target imaging. Background technique [0002] Hypersonic aircraft is a new type of combat platform that has been vigorously researched and developed at home and abroad in recent years. It has the characteristics of high speed and high maneuverability, which can make it difficult for current air defense systems to detect it. Hypersonic aircraft fly in the adjacent space of 20km-100km, its flight speed exceeds 5 times the speed of sound, and can even reach 20 times the speed of sound, and it can accurately strike sensitive targets around the world within 1 hour. Therefore, the hypersonic vehicle integrates new technologies in many disciplines in the aerospace field, and represents the future research and devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/411G01S7/414
Inventor 曹运合王宇彭志刚苏洪涛周生华谢荣
Owner XIDIAN UNIV
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