前向散射阴影逆合成孔径雷达成像误差分析  

Analysis of Forward Scattering Shadow Inverse Synthetic Aperture Radar Imaging Algorithm

作　　者：胡程[1] 周超[2] 

机构地区：[1]北京理工大学电子工程系雷达技术研究所,北京100081 [2]苏州大学电子与信息学院,苏州215006

出　　处：《电子与信息学报》2013年第5期1103-1107,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61172177;61032009)资助课题

摘　　要：阴影逆合成孔径雷达(SISAR)成像算法可以从前向散射雷达(FSR)目标回波中提取目标侧影轮廓像,其成像精度由目标的运动轨迹跟踪精度决定。该文基于小衍射角前向散射信号模型,解析推导了SISAR成像误差与目标运动轨迹跟踪误差的关系;分析了跟踪误差对目标侧影轮廓高度差和中线成像结果的影响,给出了对跟踪精度的定量要求。通过大量仿真验证了分析的正确性。Shadow Inverse Synthetic Aperture Radar（SISAR） imaging algorithm is a kind of technology to extract the profile of a target from the forward scattering signal.The imaging accuracy depends on the target coordinate estimation precision.In this paper,the relationship between the imaging error and coordinate estimation errors is analytically derived with the forward scattering signal model under the assumption of small diffraction angles.The quantitative requirements for coordinate estimation precision are made.Finally,impacts of coordinate estimation errors on SISAR imaging accuracy are verified via simulation results.

关 键 词：阴影逆合成孔径雷达 前向散射 跟踪误差 成像误差 

分 类 号：TN957.52[电子电信—信号与信息处理]