Unformatted text preview: 5. Find Z transforms of x(n) , h(n), and channel output y(n) in problems 3 and 4. Explain the results of 3 and 4 in terms of the formula Y(z)=H(z)X(z) . 6. Let sig1 = [1 2 3 4 5] and sig2 = [1 1]. Let s_out be the convolution of sig1 and sig2. Let H1(w), H2(w), and Hout(w) be frequency responses of sig1,2, and _out respectively. Use Matlab to compare graphically the spectrum magnitude |H1(w)*H2(2)| and |Hout(w)|. (|…|means absolute value, i.e. magnitude only, no phase) . Since the two magnitudes are expected to be equal, use different line patterns to plot those. (Hint - use 'freqz' to find H(w). If you have no Signal Processing toolbox, make your own routine by using DTFT definition. The latter is shown in the lectures' presentation. )...
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- Winter '07
- Digital Signal Processing, Lecturer, Dr. Vlad Dorfman, discrete channel response