Abstract
Multiple-input multiple-output synthetic aperture radar (MIMO-SAR) has drawn widely attention for its increased degrees of freedom. This enhanced architecture offers not only the opportunity to map wider images swaths with improved spatial resolution, but also enables novel SAR modes to resolve some of the contradicting user requirements. In this paper, the performance of ground moving target indication (GMTI) in MIMO-SAR system is analyzed. It becomes evident that the virtual channels can be utilized to fulfill both the image swath and the required signal-to-noise-radio. An analysis on orthogonal frequency division multiplexing (OFDM) chirp signal designing is proposed and a novel GMTI method based on low-rank property is also proposed. Simulation and experimental results show its good performance, which implies that MIMO-SAR would be a good choice for future multichannel systems.
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