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| The Theory Analysis of False Target in Sub-aperture Algorithm |
| Li Jian-yang; Chang Wen-ge; Li Yue-li |
| School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract The sub-aperture algorithm has great important role in SAR real-time processing. The algorithm combined the sub-aperture and Nonlinear Chirp Scaling (NCS) algorithm has good performance in real-time processing of UWB SAR. However the ghost or false targets exist in the algorithm based on sub-aperture. In this paper, the reason for ghost or false target existing is theoretically analyzed, furthermore, the method of eliminating the ghost is proposed using zero-padding with sub-aperture data. Finally, the validity is verified with simulation and real UWB SAR data.
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Received: 19 April 2009
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Corresponding Authors:
Li Jian-yang
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2010, Vol. 32 
