Breaking News: Grepper is joining You.com. Read the official announcement!

matlab power spectral density

Add Answer

Defeated Dragonfly answered on September 22, 2020 Popularity 5/10 Helpfulness 4/10

answer matlab power spectral density

related power spectral density - matlab

matlab power spectral density

Comment

Using fft

% signal
fs = 1000;
t = 0:1/fs:1-1/fs;
x = cos(2*pi*100*t) + randn(size(t));

%PSD calculation
N = length(x);
xdft = fft(x);
xdft = xdft(1:N/2+1);
psdx = (1/(fs*N)) * abs(xdft).^2; %deviding power spectrum by frequency resolution
psdx(2:end-1) = 2*psdx(2:end-1);  %to preserve total power in plot (from neg freq) so multiply by 2
								  %Zero frequency (DC) and the Nyquist frequency do not occur twice
freq = 0:fs/length(x):fs/2;       

%plot
plot(freq,pow2db(psdx))
grid on
title("Periodogram Using FFT")
xlabel("Frequency (Hz)")
ylabel("Power/Frequency (dB/Hz)")

Popularity 5/10 Helpfulness 4/10 Language whatever

Source: nl.mathworks.com

Tags: matlab spectral-density whatever

Link to this answer
Share Copy Link

Contributed on Apr 14 2023

Defeated Dragonfly

0 Answers Avg Quality 2/10

Closely Related Answers

power spectral density - matlab

Comment

periodogram(x)

Popularity 9/10 Helpfulness 3/10 Language whatever

Source: Grepper

Tags: matlab ma

Link to this answer
Share Copy Link

Contributed on Sep 22 2020

Mauz

0 Answers Avg Quality 2/10

power spectral density - matlab

Comment

-1

N = length(x);
xdft = fft(x);
psdx = (1/(2*pi*N)) * abs(xdft).^2;
freq = 0:(2*pi)/N:2*pi-(2*pi)/N;

plot(freq/pi,10*log10(psdx))
grid on
title('Periodogram Using FFT')
xlabel('Normalized Frequency (\times\pi rad/sample)') 
ylabel('Power/Frequency (dB/rad/sample)')

Popularity 8/10 Helpfulness 1/10 Language whatever

Source: Grepper

Tags: matlab spectral-density

Link to this answer
Share Copy Link

Contributed on Sep 22 2020

Mauz

0 Answers Avg Quality 2/10

matlab power spectral density

Contents

More Related Answers

matlab power spectral density

Closely Related Answers

power spectral density - matlab

power spectral density - matlab

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.