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A Spectral Fuzzy Suppression Method for Geo-Satellite Bistatic Synthetic Aperture Radar

A technology of synthetic aperture radar and ambiguity suppression, which is applied in the field of radar, can solve problems such as unusable multi-channel response functions, and achieve the effect of avoiding losses and reducing burdens

Active Publication Date: 2020-04-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Due to the separation of GEO satellite bistatic SAR transceiver platforms and their complex motions, the multi-channel response function for reconstruction derived in the above method cannot be used in GEO satellite bistatic SAR, so the spectrum reconstruction method in the above literature It cannot be directly used in the GEO satellite bistatic SAR system

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  • A Spectral Fuzzy Suppression Method for Geo-Satellite Bistatic Synthetic Aperture Radar

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[0047] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0048] The present invention proposes a GEO satellite bistatic synthetic aperture radar spectrum ambiguity suppression method, by using multi-channel receiving technology at the receiving station of the GEO-SA-BiSAR system, increasing the sampling points in the azimuth direction under the condition of low pulse repetition frequency, Then in the signal processing stage, the difference between channels is used to suppress the fuzzy part in the spectrum, so as to obtain the echo spectrum without fuzziness.

[0049] In order to describe content of the present invention conveniently, at first the following terms are explained:

[0050] Term 1: Geosynchronous Synthetic Aperture Radar (GEO SAR)

[0051] GEO SAR is an active remote sensing sensor that p...

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Abstract

The invention discloses a method for suppressing spectrum ambiguity of GEO satellite-based bistatic synthetic aperture radar. By using multi-channel receiving technology at the receiving station of the GEO-SA-BiSAR system, the sampling points in the azimuth direction are increased under the condition of low pulse repetition frequency, Then in the signal processing stage, the difference between channels is used to suppress the fuzzy part in the spectrum, so as to obtain the echo spectrum without fuzziness.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a suppression technology for azimuth spectrum ambiguity of a multi-channel Synthetic Aperture Radar (SAR, Synthetic Aperture Radar). Background technique [0002] Geosynchronous Synthetic Aperture Radar (Geosynchronous Synthetic Aperture Radar, GEOSAR) is located in a geosynchronous orbit of about 36,000km. It is currently a widely researched and rapidly developed synthetic aperture radar system. Compared with low-orbit SAR, GEO SAR has the advantages of large mapping width, wide monitoring coverage area, and short revisit cycle. Geosynchronous Orbit Satellite Bibase Synthetic Aperture Radar (GEO-SA-BiSAR) is an active remote sensing sensor that places the SAR payload on a geosynchronous orbit satellite, and then uses a high-speed moving airborne receiving platform to receive echo signals . [0003] Generally, in order to avoid spectral aliasing in azimuth, the pulse ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9004G01S13/9058
Inventor 武俊杰安洪阳何旬刘竹天王雯璟胡春宇黄川杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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