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An imaging algorithm for missile-borne SAR with downward movement based on variable decoupling

Jiang Huai Zhao Hui-Chang Han Min Zhang Shu-Ning

An imaging algorithm for missile-borne SAR with downward movement based on variable decoupling

Jiang Huai, Zhao Hui-Chang, Han Min, Zhang Shu-Ning
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  • Abstract views:  890
  • PDF Downloads:  592
  • Cited By: 0
Publishing process
  • Received Date:  17 November 2013
  • Accepted Date:  01 January 2014
  • Published Online:  05 April 2014

An imaging algorithm for missile-borne SAR with downward movement based on variable decoupling

  • 1. School of Electronic & Optical, Nanjing University of Science&Technology, Nanjing 210094, China;
  • 2. Institute of information, Southeast China University, Nanjing 210094, China
Fund Project:  Project supported by the National Natural Science Foundation of China(Grant Nos. 61171168, 60702016).

Abstract: The ordinary SAR imaging algorithms are inapplicable to missile-bo-rne SAR due to the high speed dive and high-squint of missile. Aiming at this problem, this paper firstly sets up the model of echo and analyses of two-dimensional spectrum. By using azimuth nonlinear chirp scaling (NLCS) based on variable decoupling, an imaging algorithm for missile-borne SAR is proposed.It can effectively compensate the scene with longitudinal and transverse Doppler shift and improve the focusing quality while it can also simplify the geometric image correction operation. Simulation results are provided to confirm the effectiveness of the proposed algorithm.

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