基于偏移技术的探地雷达SAR成像方法  

The SAR Imaging Method of GPR based on Migration

作　　者：蔚建斌[1] 陈自力[1] 江涛[1] 

机构地区：[1]军械工程学院光学与电子工程系,河北石家庄050003

出　　处：《信号处理》2010年第5期778-782,共5页Journal of Signal Processing

摘　　要：BP方法是探地雷达最常用的成像方法,通过调整回波延时完成成像过程。由于地下介质与空气的介电特性不一致,电磁波在传播过程中传播路径和传播速度会发生改变,在调整回波延时过程中,需要实时计算电磁波的传播路径,而且BP方法本身具有计算量大的缺点,造成成像效率低。为了提高计算效率,本文采用地震波处理中的偏移技术完成地下目标的成像。通过实测数据的验证,偏移成像方法不但可以实现地下目标的成像,而且计算量小,成像效率高。BP algorithm is the major imaging method of GPR and is performed by adjusting the echo time-delay. Because the dielectric property is different between the medium subsurface and air, the electromagnetic wave would change its propagation path and velocity. The real-time propagation path is needed to be calculated during the calculating of time-delay. The computational load is heavy and the efficiency is low. In order to overcome this shortcoming, migration method is adopted in this paper. By the processing of the experimental data, migration method is applied in the imaging of subsurface target successfully. The computational load is decreased and imaging efficiency improves at the same time.

关 键 词：偏移 探地雷达 SAR成像处理 

分 类 号：TN957[电子电信—信号与信息处理]