基于MIMO-SAR体制的空频域自适应动目标检测技术研究  

Study on Ground Moving Target Indication of Multiple Input Multiple Output Space-borne SAR

作　　者：张晓光[1,2] 刘祥峰[3] 付琨[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049 [3]中国国际工程咨询公司,北京100048

出　　处：《电子与信息学报》2010年第8期1997-2001,共5页Journal of Electronics & Information Technology

摘　　要：多发多收星载SAR使用多天线从不同的相位中心发射正交编码信号,多个接收相位中心接收回波后形成多通道信号,显著增大了空间自由度,有利于地面动目标检测。该文研究了多发多收星载SAR空时自适应信号处理进行地面动目标检测的技术,针对星载SAR回波信号的特点,在研究空频自适应处理算法的基础上,使用基于特征值分解的空频自适应处理算法对多发多收星载SAR的杂波进行抑制,最后完成对动目标的检测。仿真数据处理结果验证了该文方法的有效性。Multi-input multi-output spaceborne SAR transmits orthogonal coding signals with multiple antennas from different transmitting phase centers,and receives returns from different receiving phase centers to form multi-channel signals.It can increase the spatial freedom considerably,which gives advantages to detecting ground moving targets.This paper researches the ground moving targets detection technologies for multi-input multi-output spaceborne SAR with space-time adaptive signal processing.Considering the characteristics of the returns of the spaceborne SAR,in the basis of research on the space-frequency adaptive processing algorithm,the text adapts eigen-structure based space-frequency adaptive processing algorithm to suppress the clutter and completes finally the detection of the moving targets.Simulation results proves the validity of proposed algorithm.

关 键 词：合成孔径雷达 多发多收 动目标检测 空时自适应处理 

分 类 号：TN958[电子电信—信号与信息处理]