Consider a moving average FIR filter with an impulse response Let H(z) be the Z-transform of h[n].

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Consider a moving average FIR filter with an impulse response

h[n] =(8[n] + 8[n – 1]+ 8[n – 2]).

Let H(z) be the Z-transform of h[n].

(a) Find the frequency response H(ejω) of the FIR filter.

(b) Let the impulse response of a new filter be given by  h1[n] = ( ˆ’ 1)n h[n], use again the eigenfunction property to find  the frequency response H1(ejω) of the new FIR filter.

(c) Use the MATLAB functions freqzand abs to compute the magnitude response of the two filters. Plot them and determine the poles and  the zeros of the two filters. What type of filters are these?

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