cyclic_autocorrelation.m

基于参数和非参数的多种频谱检测算法研究及仿真结果分析。

function R=cyclic_autocorrelation(x,alpha,max_tau)
%
% CYCLIC_AUTOCORRELATION
%              
%              calculates the cyclic autocorrelation 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
%
% USAGE
%              R=cyclic_autocorrelation(x,alpha,max_tau)
%
%              calculate cross correlation up to max_tau time lags

% File: cyclic_autocorrelation.m
% Last Revised: 24/11/97
% Created: 24/11/97
% Author: Andrew C. McCormick
% (C) University of Strathclyde

R=cyclic_cross_correlation(x,x,alpha,max_tau);