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Chirp scaling algorithm for bi-static SAR using a precise range model

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Abstract

Among the currently available chirp scaling algorithms for bi-static SAR, some compromise with approximation in the range model, while some others use the equivalent method by first changing bi-static SAR into mono-static SAR then apply chirp scaling algorithm of mono-static SAR. Consequently, as the squint angles get large, the performance of focusing will deteriorate significantly. This paper, however, abandons those traditional solutions to the bi-static imaging problems and introduces a novel method, based on the space model of bi-static platforms. First, a precise range model is established. Then, a new chirp scaling algorithm for bi-static SAR using the precise range model is advanced. It is theoretically proven that this is an analytic solution of the bi-static chirp scaling algorithm. Images can be focused accurately even with large squint angles. At last simulations with large squint angles are made to verify the validity of the algorithm.

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Authors and Affiliations

  1. Department of Electronic Science and Engineering ATR Lab-2, National University of Defense Technology, Changsha, 410073, China

    Ning Li & LuPing Wang

  2. Postgraduate of 2007, Foreign Language College, Hunan University, Changsha, 410082, China

    Qian Li & YunYun Fan

Authors
  1. Ning Li
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  2. Qian Li
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  3. YunYun Fan
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  4. LuPing Wang
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Correspondence to Ning Li.

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Supported by the National Basic Research Program of China

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Li, N., Li, Q., Fan, Y. et al. Chirp scaling algorithm for bi-static SAR using a precise range model. Sci. China Ser. F-Inf. Sci. 52, 1378–1388 (2009). https://doi.org/10.1007/s11432-009-0072-2

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  • DOI: https://doi.org/10.1007/s11432-009-0072-2

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