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ECE 381: Laboratory 12 |
Winter 2006 |
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Fourier Transform |
April |
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Assignment |
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1. The Fourier transform of the unit pulse is the sinc function. Consider the x(t) as given below.
Plot the sinc functions for the given values of τ = 1.5, τ = 2. Shown below is the program for τ = 1.
Use M7.1 (Page 754). What happens
when you change the width of the signal?
2. Plot Fourier transform of a cosine
signal x = cos(2*pi*n/10).
Use the number of samples, N=64, 128, 256.
Hint: Use the fft function of MATLAB.
What happens when you
change the number of samples?
3. Plot Fourier transform of (2)
varying the repetitions. Use N = 256. Your observations should be same as (1).