高效机载SAR实时成像处理系统设计  

Design of efficient real-time processing system for airborne-SAR imagery

作　　者：杨磊[1] 刘亚波[1] 唐禹[1] 邢孟道[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《电路与系统学报》2013年第1期127-132,204,共7页Journal of Circuits and Systems

基　　金：武器装备预研基金项目(9140C010209090C01);高校基本科研业务费(JY10000902026)

摘　　要：针对实际中机载SAR成像的运动误差问题,提出基于子孔径分割的高效机载SAR运动补偿算法,其中成像采用线频调变标(Chirp Scaling,CS)算法。同时设计基于FPGA+DSP的实时信号处理系统,并通过合理的数据流控制,运算资源分配和任务分配,将实时成像算法高效可靠地映射到实时信号处理器内。仿真和外场成像实验都验证了该SAR实时成像处理算法和系统的有效性及可靠性。Due to that airborne SAR imaging systems often face motion error,the motion compensation algorithm combined with sub-aperture technique is proposed,where chirp scaling（CS） algorithm is used for image formation.What is more,a real-time signal processing system based on FPGA＋DSP framework is designed.Convenient data flow strategy is presented,and computational resource is also well arranged to realize efficient operation of the proposed algorithm in real-time processor.Both simulated and real-time radar data experiments are listed to validate the effectivity of the proposal.

关 键 词：机载合成孔径雷达 线频调变标算法 实时处理系统 

分 类 号：TN957[电子电信—信号与信息处理]