微型合成孔径雷达成像信号处理技术  

Imaging Signal Processing Technology for Miniature Synthetic Aperture Radar

作　　者：朱岱寅 张营 俞翔[2] 毛新华 张劲东 李勇 ZHU Daiyin;ZHANG Ying;YU Xiang;MAO Xinhua;ZHANG Jindong;LI Yong(Key Laboratory of Radar Imaging and Microwave Photonics,Ministry of Education,College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;Department of Computer Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京航空航天大学电子信息工程学院雷达成像与微波光子技术教育部重点实验室,南京211106 [2]南京工程学院计算机工程学院,南京211167

出　　处：《雷达学报（中英文）》2019年第6期793-803,共11页Journal of Radars

基　　金：国家自然科学基金(61671240);航空科学基金(20182052013)~~

摘　　要：微型合成孔径雷达(MiniSAR)有效突破了时间与空间的限制,具备轻量化、低功耗、高灵活度等优势,能够满足感兴趣区域(ROI)的高分辨成像需求。然而,MiniSAR成像信号处理依然面临若干技术难题,例如复杂航迹条件下对地面目标的高分辨成像,非合作动目标的重聚焦,数据处理的效率与实时性等。据此,该文提出了一系列成像信号处理技术及其对应的现场可编辑门阵列(FPGA)硬件设计架构,从而实现了MiniSAR高分辨率成像与实时性处理。最后,基于多组聚束/条带式MiniSAR试验结果,验证了该文方法的有效性和可靠性。Miniature Synthetic Aperture Radar(MiniSAR)has been making breakthroughs to effectively overcome the limitations of time and space,and has exhibited superiority with respect to light weight and lowpower consumption as well as high flexibility to achieve high-resolution imaging for the Region Of Interest(ROI).However,imaging signal processing for MiniSAR systems still face several technical challenges such as high-resolution imaging of ground targets under complicated trajectories,refocusing of non-cooperative moving targets,and efficient and real-time processing of echo data.In this paper,a series of imaging signal processing and associated hardware designs using Field-Programmable Gate Array(FPGA)architecture have been proposed to realize MiniSAR ultra-high-resolution imaging and real-time processing.Additionally,experimental results utilizing considerable spotlight and stripmap MiniSAR data have been presented to demonstrate the effectiveness and reliability of the proposed technology.

关 键 词：微型合成孔径雷达 高分辨率 成像信号处理 实时处理 

分 类 号：TN957.5[电子电信—信号与信息处理]