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| A High-resolution Imaging Algorithm for MIMO SAR Based on the Sub-band Synthesis in Frequency Domain |
| Deng Yun-kai① Chen Qian① Qi Hai-ming① Zheng Hui-fang① Liu Ya-dong② |
| ①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(China Academy of Space Technology, Beijing 100094, China) |
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Abstract Considering the contradiction between the azimuth resolution and the swath width for the traditional SAR, a MIMO SAR system with multiple-carrier-frequency LFM waveform is researched. The corresponding geometrical?model is built, and the expressions of the echo signals are derived in detail. A novel imaging algorithm based on the sub-band synthetic technology in frequency domain is proposed. This algorithm which integrates the removing of azimuth ambiguities, the synthesis of the sub-band and the CS imaging can realize 2-D high resolution and wide swath simultaneously. And the improved sub-band synthetic algorithm has more efficiency and practicality than the traditional sub-band synthetic algorithms in time frequency domain. The effectiveness of this method is verified with the theoretical analysis and the computer-based simulations.
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Received: 08 October 2010
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Corresponding Authors:
Chen Qian
E-mail: chenqian19860123@sina.com
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2011, Vol. 33 
