大斜视机载聚束SAR时域校正距离走动的频率尺度成像算法  

Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR

作　　者：左伟华[1,2] 皮亦鸣[1] 闵锐[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731 [2]怀化学院,湖南怀化418000

出　　处：《电子学报》2013年第9期1716-1723,共8页Acta Electronica Sinica

摘　　要：本文采用时域校正距离走动的方法,对传统频率尺度算法距离压缩进行改进;在方位压缩中,采用非线性调频变标的方法,解决距离走动校正带来的方位向调频率空变性问题.数值仿真实验证明了本文提出算法处理大斜视聚束SAR回波的正确性及有效性.In this paper the range walk correction in time domain is introduced to revise the range compressing of the tradi- tional frequency scaling algorithm. In the azimuth compressing, a method named azimuth nonlinear chirp scaling is involved to solve the azimuth position dependence of the azimuth modulation rate introduced by the range walk correction. The simulation experirnents verify the correct and validity of the proposed algorithm in focusing the echo of high squint spotlight SAR.

关 键 词：合成孔径雷达 聚束模式 频率尺度算法 距离走动校正 

分 类 号：TN959.3[电子电信—信号与信息处理]