dfs.m

the file contain many matlab signal source code and many example .

function [Xk]=dfs(xn,N)
% Computes Discrete Fourier Series Coefficients
% ----------------
% [Xk]=dfs(xn,N)
% Xk=DFS coef.array over 0<=k<N-1
% xn=One period of periodic signal over 0<=n<M<=N-1
% N=Fundamental period of xn
%
n=[0:1:N-1];
k=[0:1:N-1];
WN=exp(-j*2*pi/N);
nk=n'*k;
WNnk=WN.^nk;
Xk=xn*WNnk;