compute Magnitude and Phase of transformed signal using FFT using DSP - Code

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Thursday, November 10, 2011

compute Magnitude and Phase of transformed signal using FFT using DSP


  Magnitude and Phase


AIM:- To compute Magnitude and Phase of transformed signal using FFT.

THEORY: - Fast Fourier Transform algorithms are faster algorithms to compute DFT. Magnitude and Phase plots can be observed for the Fourier transformed signal. Cestral  analysis is special case of frequency domain techniques.

PROGRAM: -

Fs = 1000;
T = 1/ Fs;
t = 0:T:1;
y = sin ( 2 * pi * 200 * t );            // generates sine wave of 200Hz //
plot(y)
z = fft(y,1024);     // gets 1024 point fft for y //
N = ( 0 :1023 )’ * Fs / 1024;
z1 = abs(z);
plot( N, z1)
title( ‘ FFT Plot ‘ )
z2 = angle (z);
plot( N, z2 )
title( ‘ Phase Plot ‘)

RESULT: - Magnitude and Phase plots were observed and plotted.








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