?? idft.m
字號:
function[xn]=idft(Xk,N)
%Computes Inverse Discrete Transform
%-----------------------------------
%[xn]=idft(Xk,N)
%xn=N-point sequence over 0<=n<=N-1
%Xk=DFT coeff.array over 0<=k<=N-1
%N=length of DFT
n=[0:1:N-1]; %row vector for n
k=[0:1:N-1]; %row vector for k
WN=exp(j*2*pi/N); %Wn factor
nk=n'*k; %creates a N by N matrix of nk values
WNnk=WN.^(-nk); %IDFT matrix
xn=(Xk*WNnk)/N %row vector for IDFT values
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -