2D FFT Plot
2 views (last 30 days)
Show older comments
I am plotting the 2D FFT plot of a matrix
clc;clear all;close all;
format long;
f1= 128;f2=512; fs=2^12;
time=0:1/fs:1-(1/fs);
D=8;
var=5e-8;
N=2^10;
disp(fs/N);
t=time(1:N);
sig=sin(2*pi*f1*t);%+sin(2*pi*f2*t);
x=sig+sqrt(var)*randn(size(t));
x1=reshape(x,length(x)/D,D);
xfft2=fftshift(fft2(winx));
y=abs(xfft2);
mesh(y);
The 2D FFT of this signal should be a sinc signal.Can anyone please explain why I am getting a triangular plot here?
1 Comment
Akira Agata
on 17 Feb 2017
In your sample code, a variable winx seems undefined. Is this a typo of x1 ?
Answers (0)
See Also
Categories
Find more on Transforms in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!