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An Imaging Algorithm for Space-borne SAR Based on Range Walk Correction |
Liu Ji-bang①②; Han Song① |
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China); ②(Graduate University of Chinese Academy of Sciences, Beijing 100039, China) |
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Abstract In this paper, an algorithm is proposed to resolve the precise imaging problem of space-borne SAR with large cell migration. This algorithm is derived in detail based on the squinted equivalent range model. A distinct difference from other algorithms is that this algorithm begins with range walk correction in the time domain, which obviously reduces the coupling between range and azimuth signal. This algorithm is compared with a common squint mode chirp scaling algorithm through the computer simulation, and the result shows that the imaging method presented in this paper is effective.
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Received: 20 July 2006
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