SAR实时处理中方位向数据降采样的实现  

Undersampling Processing of SAR Imaging Data in Azimuth Direction

作　　者：方志红[1] 周荫清[2] 李春升[2] 

机构地区：[1]中国电子科技集团公司第38所成像中心,北京100083 [2]北京航空航天大学电子工程系,北京100083

出　　处：《遥测遥控》2003年第4期24-26,共3页Journal of Telemetry,Tracking and Command

摘　　要：在机载 SAR中 ,成像分辨率所要求的方位向带宽往往比脉冲重复频率要低得多。对 SAR数据方位向进行降采样可以在不损失成像分辨率的情况下大大降低成像数据量与运算量。配合使用子孔径算法效果更为显著。In airborne SAR,the azimuth bandwidth demanded by imaging resolution is usally much lower than the pulse repetition frequency.So,the undersampling processing combined with the subaperture algorithm to the SAR raw data was performed in the azimuth direction,which led to a obvious reduction of the data rate and calculation load without losing the resolution.Accordingly,the stress on the real-time imaging could be lightened.The imaging result of a SAR data processed by this method is presented in this paper.

关 键 词：合成孔径雷达 降采样处理 自适应滤波器 

分 类 号：TN957.52[电子电信—信号与信息处理]