随机调频信号旁瓣抑制及成像  

Sidelobe Suppression and Imaging of the Random FM Signal

作　　者：邓云凯[1] 郑远[1,2] 胡英辉[1,2] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100039

出　　处：《电子与信息学报》2009年第8期1886-1891,共6页Journal of Electronics & Information Technology

摘　　要：随机信号的旁瓣抑制问题是研究中的一个难点,通过简单有效的方法来降低随机信号的旁瓣具有较强的现实意义。该文构造出随机调频信号的连续时间模型。从理论上分析了高斯分布以及均匀分布情况下,随机调频信号的均方根带宽及点扩散函数。并采用波数域算法对该信号模型在合成孔径雷达中的应用进行了成像研究。仿真结果验证了对信号模型研究的正确性,结果表明:随机调频信号可以获得比线性调频情况下更低的峰值旁瓣比,应用在合成孔径雷达中具有较好的成像效果。Since the sidelobe suppression of a random signal is a difficulty in research, it has realistic meaning to suppress the sidelobe in a simple and effective way. A continuous time model of random frequency modulation signal is developed in this paper. The root mean square bandwidth and point spread function of the random frequency modulation signal both in gaussian and uniform distribution cases are investigated theoretically. The signal model is verified by the result of the simulation, which shows that it can obtain a higher Peak SideLobe Ratio（PSLR） that the linear frequency modulation case, and it can achieve a good effectersult in radar imaging.

关 键 词：合成孔径雷达 随机信号 旁瓣抑制 点扩散函数 波数域算法 

分 类 号：TN957.51[电子电信—信号与信息处理]