Abstract
ABSTRACTSingle-input multiple-output and multiple-input multiple-output configurations for stepped-frequency bistatic SAR (BiSAR) are proposed in this article to deal with the contradiction between Doppler ambiguity and swath width that arises in the stepped-frequency single-channel BiSAR. In the two new configurations, the space variance of range error within a pulse cluster becomes more prominent. This feature requires more precise range error compensation to maintain high-quality imaging. For this problem, a synthetic bandwidth method embedded in back projection algorithm is proposed. The simulation results validate the effectiveness of the two configurations and the image reconstruction method.
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