存在严重通道误差情况下的SAR-GMTI方法分析  

Analysis of SAR-GMTI Methods in the Case of Serious Channel Error

作　　者：刘颖[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2011年第6期37-40,45,共5页Modern Radar

摘　　要：天线方向图不一致和天线相位中心间距误差等通道幅相误差会使传统多通道地面运动目标检测方法的杂波抑制性能下降,从而最终影响地面运动目标的检测性能。分析了空时自适应处理技术和相位中心偏置天线技术2种方法在较大通道误差情况下的性能,并介绍了一种二维自适应的通道误差校正方法。该误差校正方法是一种运算量小且性能较好的误差估计与补偿方法。通过实测数据验证了分析的正确性和方法的有效性。In the case of channel error, such as different antenna patterns, error of antenna phase centers distance and so on , the clutter suppression performance of traditional multichannel ground moving target detection methods degrades seriously, consequently, the performance of ground moving target detection will be influenced. The performances of space-time adaptive processing （STAP） method and displaced phase center antenna（DPCA） method were analyzed in the case of channel error. An effective chan- nel error correction method was introduced in this paper named as two-dimensional adaptive channel error correction method. The performance of the method was preferable with little operation amout. The accuracy of analysis and the validity of method were validated using measured data.

关 键 词：地面动目标检测 通道误差 通道均衡 

分 类 号：TN958[电子电信—信号与信息处理]