适于大斜视角星载SAR系统的改进距离┐多普勒算法  

A Modified Range\|Doppler Algorithm for Spaceborne SAR with Large Squint AngleT]

作　　者：张劲林[1] 许荣庆[1] 刘永坦[1] 

机构地区：[1]哈尔滨工业大学电子工程技术研究所

出　　处：《系统工程与电子技术》1999年第8期9-11,共3页Systems Engineering and Electronics

摘　　要：分析了当天线斜视角增大时，导致传统距离－多普勒成像算法性能下降的主要误差来源。提出了一种适合大斜视角星载ＳＡＲ系统的改进距离－多普勒算法，并给出了处理仿真点目标数据得到图像质量的比较。结果表明，在大斜视角情况下，改进算法的性能远大于传统的距离－多普勒成像算法。For spaceborne SAR system with large squint angle, the main error source of classical range\|Doppler algorithm is analyzed which causes the loss in image quality. A modified range\|Doppler algorithm for spaceborne SAR with large squint angle is presented and the quality of images of simulated point target echoes gained by two algorithms are list in the paper. The results show the modified algorithm is much better than the classical range\|Doppler algorithm at the case of large squint angle.

关 键 词：合成孔径雷达 星载雷达 多普勒成像 算法 

分 类 号：TN958[电子电信—信号与信息处理]