De-chirp LFM-CW SAR原始回波信号模拟  

Raw data simulation of De-chirp LFM-CW SAR

作　　者：耿淑敏[1] 朱珍珍[1] 皇甫堪[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《计算机工程与应用》2008年第27期223-225,244,共4页Computer Engineering and Applications

摘　　要：将基于De-chirp LFM-CW SAR的信号特点,首先给出其信号模型;根据给定的信号模型,提出一种适合De-chirp LFM-CW SAR的基于FFT的快速回波模拟算法,与时域直接叠加算法相比,保持数据精度的同时,运算量大大降低。通过对原始数据成像处理后得到的图像进行分析,验证了算法的有效性。Based on the characteristics of De-chirp LFM-CW SAR signals,the signal model is analyzed firstly.Then a fast raw data simulation algorithm based on FFT is presented according to the given signal model,with the same data precision,the computation burden is reduced significantly compared to the time domain direct adding algorithm.The algorithm is proved valid by the analysis of the compressed image of raw data simulated.

关 键 词：SAR 线性调频连续波 去调频 原始回波模拟 快速算法 

分 类 号：TN957[电子电信—信号与信息处理]