AIM: To verify Power Spectral Density
Operating System - Windows XP
Constructor - Simulator
Software - CCStudio 3 & MATLAB 7.5
%Power spectral density
t = 0:0.001:0.6;
x = sin(2*pi*50*t)+sin(2*pi*120*t);
y = x + 2*randn(size(t));
title('Signal Corrupted with Zero-Mean Random Noise')
Y = fft(y,512);
%The power spectral density, a measurement of the energy at various frequencies, is:
Pyy = Y.* conj(Y) / 512;
f = 1000*(0:256)/512;
title('Frequency content of y');
RESULT: The power spectral density of given sequence is obtained. Hence the theory and practical value are proved.
Outcome: At the end of the experiment the students are able to find the power spectral density of given sequence is obtained.
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? How do you reduce spectral leakage?
? What do you mean by spectral resolution?