摘要
运动补偿问题是制约机载调频连续波合成孔径雷达(FMCW SAR)实现超高分辨率成像的瓶颈。在考虑了载机存在非理想运动的情况下,讨论了信号持续时间内载机运动的补偿问题;深入分析了超高分辨率聚束SAR成像运动误差的空变特性;进而提出了适用于超高分辨率机载FMCW SAR成像的逆投影成像算法以及包括运动补偿环节的成像处理方案,并与基于波数域算法的方案进行了比较。理论推导和仿真实验,验证了方案的可行性和正确性。
The combination of frequency modulated continuous wave （FMCW） technology and synthetic aperture radar （SAR） techniques is often used to obtain ultra-high resolution. Motion compensation is the bottle-neck of imaging when FMCW SAR works on airborne craft. The compensation of motion during transmission and reception of a pulse when the aircraft existed trajectory deviation was discussed, and then the space-variant characters of motion error in raw data of ultra-high resolution spotlight SAR was deeply analyzed. Based on the above, an imaging scheme integrated with BP （Back Projection） algorithm and certain motion compensation process, which aimed at ultra-high resolution airborne FMCW SAR imaging, was proposed. The deduction and simulation prove the feasibility and validity of this scheme.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第18期5861-5864,5873,共5页
Journal of System Simulation
基金
中科院国防科技创新基金(CXJJ-158)
关键词
合成孔径雷达
调频连续波
超高分辨率
运动补偿
逆投影算法
synthetic aperture radar（SAR）
frequency modulated continuous wave（FMCW）
ultra-high resolution
motion compensation
back projection algorithm
