ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Motion Error Compensation and Imaging for MIMO-SAR Based on Compressed Sensing
Received date: 2013-05-29
Revised date: 2013-10-08
Online published: 2013-10-12
Supported by
National Basic Research Program of China (2010CB731905); National Natural Science Foundation of China (61201369); Natural Science Foundation of Shaanxi Province (2013JQ8008); The Foundation of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing (21102); The Doctoral Foundation of Information and Navigation Institute, Air Force Engineering University
Multiple-input multiple-output synthetic aperture radar (MIMO-SAR) can realize high resolution imaging by its predominance of the multichannel spatial parallel sampling, but the inevitable problems of motion compensation and huge amount of echo data need to be resolved. A novel motion error compensation and imaging method for MIMO-SAR based on compressed sensing (CS) is proposed. Firstly, the echo signal model of MIMO-SAR system with motion error is analyzed and the motion error of the Nyquist-sampled data is corrected by the two steps of compensation. Secondly, in order to compensate the motion error of the under-sampled echo signal, the transform operator is constructed, which could realize the first step of compensation, range compression and range migration correction processing. At last, the imaging result is obtained by the second step of compensation and azimuth compression. The effectiveness of the proposed method is proved by the imaging simulations. By using the proposed method, just a small amount of imaging data is required for MIMO-SAR motion error compensation and imaging.
GU Fufei , ZHANG Qun , GUAN Hua , YANG Qiu , PENG Faxiang . Motion Error Compensation and Imaging for MIMO-SAR Based on Compressed Sensing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(3) : 838 -847 . DOI: 10.7527/S1000-6893.2013.0410
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