www.gusucode.com > 循环自相关函数工具箱源码程序 > matlab代做 修改 程序循环自相关函数工具箱/cyclostationary_toolbox/cyclic_autocovariance.m
function R=cyclic_autocovariance(x,alpha,max_tau) % % CYCLIC_AUTOCOVARIANCE % % calculates the cyclic autocovariance for signal % x at frequency alpha % % R(k*alpha,tau)=E{x(t-tau/2)x(t+tau/2)exp(-jk(alpha)t)} % for k=0 ... 1/alpha % Signal x has its periodic average removed % % USAGE % R=cyclic_autocovariance(x,alpha,max_tau) % % calculate autocovariance up to max_tau time lags % File: cyclic_autocovariance.m % Last Revised: 24/11/97 % Created: 24/11/97 % Author: Andrew C. McCormick % (C) University of Strathclyde R=cyclic_cross_covariance(x,x,alpha,max_tau);