Chirp-z变换在雷达信号处理中的应用  

Application of Chirp-z Transform in Radar Signal Processing

作　　者：徐飞[1] 王延暴[1] 

机构地区：[1]西安电子工程研究所,陕西西安710010

出　　处：《现代电子技术》2011年第9期28-29,34,共3页Modern Electronics Technique

摘　　要：雷达信号处理算法中大多数采用FFT方法测量频率,如果提高测频精度需增加FFT点数,增加FFT点数的实质是在整个单位圆(即整个距离谱)上均匀增加频域采样点数,从而造成运算量的成倍增加。Chirp-z变换可以实现对回波频谱中的某段进行局部细化,从而在采样点数、运算量增加不多的情况下,大大提高雷达的测量精度。FFT is usually used to measure frequency in radar signal processing.The FFT points should be increased for improving the frequency-measurement accuracy.While,the equably distributed sample points caused a waste of time for computation.Chirp-z transform can only work on special position so as to improve the measurement precision of radar with increasing little sample points and computation.

关 键 词：测频精度 FFT CHIRP-Z变换 频域采样 

分 类 号：TN95-34[电子电信—信号与信息处理]