摘要
建立了多相位中心SAR在欠采样和非均匀采样状况下工作的回波数学模型,推导了其成像压缩结果的数学表达式.分析了“欠采样”成对回波和“速度失配”成对回波的形成机理,给出了成对回波定位和强度的通用计算公式.最后给出的仿真验证了本文结论的正确性.
The mathematic model standing for undersampled and nonuniformly sampled signals of MPCSAR is developed and the corresponding imaging result representatives are also deduced in this paper. The reasons of the paired false target echoes are analyzed and the paired echoes are divided into two types, one is called ＂undersampled type＂ and anather, ＂velocity mismatched type＂. The formulas are given to locate the paired echoes and to calculate the intensity of echoes and the simulation results performed in the paper have proved the validity of those formulas.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2006年第3期385-390,共6页
Acta Electronica Sinica
关键词
多相位中心SAR
欠采样
速度失配
成对回波
multiple phase center SAR
undersamplinhg
velocity mismatch
paired echo
