How to Plot Phase Response of Discrete Time Fourier Transform (DTFT)?

17 次查看（过去 30 天）
Matlab Student
Matlab Student 2016-2-29
I have implemented the DTFT in a MATLAB function.The function takes the array of values and the starting index as its arguments.
function[X]=DTFT(x,n)
syms w
l=length(x);
n_=n:l+n-1;
e=exp(-1j*w*n_);
X=sum(x.*(e));
end
I have implemented the DTFT function with the following code :
x=[2 1 0 1 2];
hold on
subplot (1,2,1) ;ezplot(abs(DTFT(x,-2)));
title('DTFT of Original Signal');
subplot(1,2,2); ezplot(angle(DTFT(x,-2)));
title('Phase Response of Original Signal');
As per the book, the magnitude of the DTFT is correct; however, the phase response should be zero for the symmetric array of x given above, which isn't the case.
How do I get the proper zero phase response/What am I doing wrong here?

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Discrete Fourier and Cosine Transforms 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by