摘要
本文分析了ChirpScaling算法推导过程中残留三次相位误差对成像质量的影响 ,在此基础上提出了一种基于非线性FM滤波的高分辨星载SAR成像处理SC ChirpScaling算法 .该算法采用斜视等效距离模型 ,利用非线性FM滤波方法实现了ChirpScaling算法的三次相位误差修正 ,使高分辨率星载SAR成像质量获得明显改善 .计算机仿真结果验证了该算法的有效性 .
The effects of residual cubic phase error induced by Chirp Scaling algorithm on SAR image qualities are analyzed,and an SC Chirp Scaling imaging algorithm for high resolution spaceborne SAR based on nonlinear FM filter is proposed in this paper.Squint equivalent range model is used,and a nonlinear FM filter method is applied to achieve cubic phase error correction in the algorithm.Computer simulation results are presented,which illustrate the algorithm having the capability to acquire evident improvement of high resolution spaceborne SAR image qualities.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2000年第12期5-7,共3页
Acta Electronica Sinica
基金
国家863计划支持课题
