Info

此问题已关闭。 请重新打开它进行编辑或回答。

Chosing correct frequency axes.

1 次查看（过去 30 天）
Mayank Lakhani
Mayank Lakhani 2015-7-8
关闭： MATLAB Answer Bot 2021-8-20
Hi all, I want to have amplitude and phase reconstruction of the signal. My signal is having 40KHz bandwidth and starting frequency is 70Khz to 110 KHz. Suppose my signal is x.
nfft = length(x);
res = fft(x,nfft)/ nfft; % normalizing the fft
f = fs/2*linspace(0,1,nfft/2+1); % choosing correct frequency
res = res(1:nfft/2+1); % amplitude of fft
res2 = fft(res);
now i want to plot frequncy versus amplitude and frequency versus phase. figure, plot(f,abs(res2) where the amplitude shoud be lying from the 70KHz to 110 Khz and same in the Figure(f,angle(res2), the phase shoud be spreaded over 70kHz to 110Khz. So how to chose the correct frequency axes.

请先登录，再回答此问题。

回答（0 个）

标签

Community Treasure Hunt

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

Start Hunting!

Translated by