idfs.m

来自「the file contain many matlab signal sour」· M 代码 · 共 15 行

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