调频连续波SAR实时成像算法研究
doi: 10.3724/SP.J.1146.2012.01004
Study on the Real Time Imaging Algorithm for Frequency Modulated Continuous Wave Synthetic Aperture Radar
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摘要: 调频连续波(Frequency Modulation Continuous Wave, FMCW)体制与合成孔径雷达(Synthetic Aperture Radar, SAR)的结合，推动了小型化、低功耗、低成本、高分辨率成像雷达的快速发展。该文建立了FMCW SAR的信号模型，统一了FMCW SAR频域算法的理论表达； 结合运动补偿处理，以减小系统计算量为出发点，提出了一种简化的实时成像流程，并在理论上对简化过程引入的相位误差做出细致的理论与量化分析。仿真实验验证了该文所提简化流程的适用性。Abstract: The combination of Frequency Modulation Continuous Wave (FMCW) and Synthetic Aperture Radar (SAR) leads to the rapid development of a compact, low power consumption, cheap and high resolution imaging sensor. A corrected signal model of FMCW SAR is built in this paper which forms the basis for the following study. The generalized expression of FMCW SAR algorithms in frequency domain is derived. For the sake of reduce the computation, a simplified imaging flow with motion compensation operation is proposed and the errors introduced by the simplification is analyzed in detail. Finally, the simulated FMCW SAR data verify the feasibility of proposed method.
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