Multichannel synthetic aperture radar imaging method

A synthetic aperture radar, multi-channel technology, applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, measurement devices, etc., can solve the problems of high computational complexity and difficult implementation, reduce computational costs, and suppress azimuth ambiguity. , the effect of reducing requirements

Inactive Publication Date: 2014-03-12
INST OF ELECTRONICS CHINESE ACAD OF SCI
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However, the existing methods involve the multiplication of large-scale matrices and v

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[0017] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0018] In the multi-channel synthetic aperture radar imaging method of the present invention, the input data is the SAR echo data of one transmission and multiple reception, and the final output data is the backscattering coefficient matrix of the observation scene, that is, the complex image of the observation scene. The multi-channel Synthetic Aperture Radar (SAR) imaging method of the present invention i...

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Abstract

The invention provides a multichannel synthetic aperture radar SAR imaging method comprising the following steps: forming a multichannel radar observation equation Yi based on an echo simulation operator Mi (X) according to one-emission-multi-reception SAR echo data; forming a multichannel SAR imaging model based on sparse regularization according to the multichannel radar observation equation Yi; employing a threshold iteration algorithm to solve the multichannel SAR imaging model, and reconstructing observation scene backscattering coefficient X*, thereby obtaining a complex image of the observation scene. The multichannel synthetic aperture radar SAR imaging method can improve operation efficiency and reduce calculation cost.

Description

technical field [0001] The invention relates to the technical field of radar in the electronics industry, in particular to a multi-channel Synthetic Aperture Radar (SAR) imaging method based on echo simulation operators and sparse regularization. Background technique [0002] As an active microwave imaging system, synthetic aperture radar has the characteristics of all-time, all-weather and high-resolution imaging. However, in SAR system design, there is a considerable contradiction in the requirements of high azimuth resolution and wide mapping bandwidth for Pulse Repetition Frequency (PRF). On the one hand, high resolution requires high PRF, and on the other hand, wide mapping bandwidth A low sampling frequency is required so that the radar can accept distant echoes. [0003] DisplacedPhaseCentreAntenna (DPCA) processing technology is one of the existing multi-channel synthetic aperture imaging technologies. It uses the one-shot-multiple-receive mechanism to obtain multi-...

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IPC IPC(8): G01S13/90
CPCG01S7/2813G01S7/2925G01S13/90G01S13/904
Inventor 吴一戎徐宗本方健洪文张冰尘
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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