FMCW-SAR体制下快速运动目标检测与成像方法  

Approach for Fast-moving Target Detection and Imaging in FMCW SAR

作　　者：王金伟[1] 周峰[1] 吴玉峰[1] 孙光才[1] 张子敬[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,西安710071

出　　处：《电子与信息学报》2014年第11期2684-2690,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(11176022;61201283;61172137;61301292);新世纪优秀人才支持计划(NCET-12-0916);基本科研业务费(K5051302047;K5051202001);信息综合控制国家重点实验室项目(newl20080201)资助课题

摘　　要：针对调频连续波合成孔径雷达(FMCW-SAR)体制下的快速运动目标检测与成像问题,该文提出一种双通道FMCW-SAR动目标检测和成像新方法。该方法考虑到调频连续波固有的特点,将多普勒频移补偿和偏置相位天线(DPCA)技术结合,进行杂波抑制,检测动目标。并针对快速运动目标的散焦和多普勒谱分裂等问题,采用Keystone变换、方位去斜等方法实现快速运动目标的重聚焦。最后,仿真实验验证了所提方法的有效性和可行性。To resolve the problem of fast-moving target detection and imaging in Frequency Modulated Continuous Wave SAR （FMCW-SAR）, a new method of moving target detection and imaging in double-channel FMCW-SAR is presented in this paper. Considering the inherent characteristics of FMCW, the stationary clutter is eliminated and moving targets are detected by combining the Doppler frequency shift compensation with Displaced Phase Center Antenna （DPCA） technology. To solve the problem of fast-moving targets defocus and Doppler spectrum split, one method combining the Keystone transform with azimuth deramp is presented to refocus fast-moving targets. Finally, simulation results are provided to demonstrate the effectiveness and feasibility of the proposed method.

关 键 词：合成孔径雷达 调频连续波 地面动目标检测与成像 

分 类 号：TN958[电子电信—信号与信息处理]