FMCW SAR 运动补偿处理技术研究

摘要

The combination of frequency modulated continuous wave (FMCW)and synthetic aperture radar (SAR)leads to the rapid development of the compact ,low-cost ,low power imaging sensors .The model of imaging in the presence of motion error is presented firstly ,based on which the difference of motion compensation between FMCW SAR and pulsed SAR is compared .The in-tegrated processing flow of motion compensation is proposed ,contains the compensation along track and in the line of sight .The ex-perimental FMCW SAR data and focused SAR images verify the feasibility of the proposed method .%调频连续波（Frequency Modulated Continuous Wave ，FMCW ）技术与合成孔径雷达（Synthetic Aperture Radar ， SAR）技术的结合，促进了小型化、低成本、低功耗、高分辨率成像传感器的发展。本文建立了非理想情况下FMCW SAR的回波信号模型，分析了FMCW SAR运动补偿处理同脉冲体制SAR的区别；提出了完整的三维误差补偿流程，并分别论证了前向运动误差及沿视线方向（Line of Sight ，LOS ）方向运动补偿处理方法；文中最后采用FMCW SAR实测数据对所提处理流程进行了验证。