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| High-resolution Wide-swath Imaging for Spaceborne SAR Based on Periodic Non-uniform Sampling |
| Wu Yu-feng Sun Guang-cai Yang Jun Xing Meng-dao Zhou Feng |
| National Key Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China |
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Abstract In order to solve the contradiction between high-resolution and wide-swath for the spaceborne single- channel SAR system, this paper proposes a new method based on periodic non-uniform sampling. The method uses the non-uniform sampling to avoid the overlap of blind ranges, making the blind from the same range unit appears in one sampling channel mostly; The method uses the periodic sampling to construct the equivalent multi-channel data, and uses the multi-channel unambiguous reconstruction method to reconstruct the signal’s spectrum. The paper also analyzes the optimal design of non-uniform sampling method in detail. Finally, simulation results verify the effectiveness of the method.
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Received: 25 May 2011
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Corresponding Authors:
Wu Yu-feng
E-mail: wyf1176@163.com
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2012, Vol. 34 
