机载SAR大斜视角成像算法及其性能分析
Imaging Algorithms and Analysis of Airborne SAR in Large Squint Mode
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摘要: 文章研究了机载合成孔径雷达(SAR)在大斜视角下的成像算法，并分析了算法的成像性能。根据大斜视角SAR成像的空间几何模型和回波信号特点，提出了RD算法的改进方案。对改进的RD算法和ECS算法的仿真表明，其成像性能满足了大斜视角下机载SAR成像处理的要求。Abstract: This paper studies image algorithms and analyses imaging quality of air-borne Synthetic Aperture Radar (SAR) in large squint mode. Based on the spatial geometry model of squint mode air-borne SAR and echo response, a method to improve RD algorithm is introduced in detail, and the flowcharts of this algorithm and Extended Chirp Scaling (ECS) algorithm are given. The simulation results demonstrate that these two algorithms meet the requirements of air-borne SAR imaging in large squint mode.
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