A New Encoding Transponders for SAR Calibration
会议名称：《2007 Asian and Pacific Conference on Synthetic Aperture Radar(APSAR 2007)》
会议日期：2007年
学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081105[工学-导航、制导与控制] 081001[工学-通信与信息系统] 081002[工学-信号与信息处理] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
基 金：supported by NSFC 60772156
关 键 词：SAR transponder encoding and undersampling
摘 要：A transponder can encode the signal transmitted by synthetic aperture radar （SAR）. The reflected signal from the encoding transponder to SAR can be imaged with the background signals suppressed. One type of encoding transponder is to make the linear frequency modulation （LFM） signal transmitted by SAR inverted. To realize this aim,there are the analog mixing method and the digital undersampling method,which is put forward in this paper. The error models of these two methods are studied. Simulation experiments about an input LFM signal are carried out. The results prove that the precision of the digital undersampling method is better than that of the analog mixing method.