相关函数在检测周期性信号中的应用  

Correlation Function-based Algorithm for Detecting Periodic Signal

作　　者：杨墨[1] 孙文[2] 赵志骏[3] 孙剑波[3] 

机构地区：[1]北华航天工业学院机械工程系,河北廊坊065000 [2]承德石油高等专科学校电工系,河北承德067000 [3]承德石油高等专科学校科技处,河北承德067000

出　　处：《承德石油高等专科学校学报》2007年第1期25-27,共3页Journal of Chengde Petroleum College

摘　　要：介绍了相关函数的定义及其物理意义。根据定义推导出函数的某些相关性质。根据推导结果设计了一种从白噪声中检测周期性信号的算法。通过软件仿真,发现该算法实用有效,而且可以在噪声功率大于周期信号功率的情况下有效分辩出有用信号的周期。The definition and physical sense of correlation function are introduced at the beginning and then some important qualities are fetched. We design the algorithm to detect periodic signal from white noise by the derivation. After software simulation, we find that the algorithm is not only easy to be realized, but also efficient to help detect the period of useful signal even when the noise power is larger than periodic signal power.

关 键 词：相关函数 数字信号处理 白噪声 信号功率 

分 类 号：TB53[理学—物理]