平稳随机信号非均匀采样的分析  

Spectra Analysis of Non-uniformly Sampled Signal of Stationary Stochastic Processes

作　　者：刘民[1] 邓丹[1] 卿粼波[1] 张琳[1] 邓建奇[1] 

机构地区：[1]四川大学电子信息学院,四川成都610064

出　　处：《江西农业大学学报》2005年第1期154-157,共4页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(No. 60272095);教育部博士点基金项目;四川省科技攻关项目

摘　　要：目前的模拟信号数字化多是基于对模拟信号等时间间隔采样而得到数字信号来描述该信号特征,而实际应用中往往不能避免采样时钟的非均匀性;传统的频谱分析方法必然产生原理误差。引入随机延迟系统的知识,推导了起数字频谱的一般公式,分析了具有典型分布函数的随机采样情况。In effect spectra analysis for stationary stochastic signal is based on sampled data at uniform time interval. In practice, non-uniform sampling often occurs; therefore the accuracy of classical spectra analysis is in doubt. This paper introduces knowledge of stationary stochastic point processes to make a model of non-uniformly sampled signal of random processes, derives the spectra representation, and discusses some stochastic sampling cases in which the data are sampled by typical distribution function.

关 键 词：:非均匀采样 功率谱 分布函数 特征函数 

分 类 号：C202[社会学] O177.7[理学—数学]