基于频率变标的调频连续波SAR成像算法  

FMCW SAR imaging algorithm based on frequency scaling

作　　者：赵毅寰[1,2] 郑力文[1] 高静[1,2] 崔炳喆[1,2] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]航空制导武器航空科技重点实验室,河南洛阳471009

出　　处：《现代电子技术》2012年第7期23-25,30,共4页Modern Electronics Technique

摘　　要：给出了一种改进的频率变标算法,该算法适用于处理距离解线调后的调频连续波SAR数据。对调频连续波SAR回波信号进行了建模,分析了信号的特征,揭示了平台的连续运动在距离向产生了一个多普勒频移的特性,应用频率变标技术,在频域完成补偿。实测数据处理结果表明,该算法能得到较好的成像结果。An extended frequency scaling algorithm is introduced.This algorithm allows the processing of dechirped raw data for frequency modulated continuous wave（FMCW） synthetic aperture radar（SAR）.The model of FMCW SAR echo is established,the characteristics are analyzed,and the Doppler frequency shift effect in range direction induced by the continuous motion while radar transmitting and receiving signal is revealed.By means of a new frequency scaling operation,the Doppler frequency shift is compensated in the frequency domain.The imaging of raw data validates the algorithm.

关 键 词：调频连续波 合成孔径雷达 频率变标 多普勒频移 

分 类 号：TN957.52[电子电信—信号与信息处理]