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  3. let x[n] = cos(17?n 64 ) + 2sin(23?n 32 ) for 0 ?

Let x[n] = cos(17?n 64 ) + 2sin(23?n 32 ) for 0 ? n ?...

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Electrical Engineering

Let x[n] = cos(17?n 64 ) + 2sin(23?n 32 ) for 0 ? n ? 255, and 0otherwise. The signal x[n] is passed through an LTI system withtransfer function H(z) = (1? 1 2z?1)(1? 1 3z?1). Denote the signalat the output of the system by y[n]. We want to recover x[n] bypassing y[n] through an inverse system.

(a) Find (analytically) an impulse response g[n] of the inversesystem, G(z) = 1 H(z). (Note: the inverse system is an IIRsystem.)

(b) Apply a rectangular window of length M = 8, w[n] =( 1 0 ? n? 7, 0 otherwise, to obtain an FIR ?lter r[n] = g[n]·w[n]. Pleaseplot the frequency response of the FIR ?lter. Compare it with thefrequency response of the IIR inverse system Is M = 8 anappropriate choice?

(c) Compute ˆ x[n] = r[n]?y[n]. Plot x[n], y[n], and ˆx[n]?x[n].

Answer & Explanation Solved by verified expert
3.6 Ratings (279 Votes)
clcclose allclear alln 01255 number of samplesxn cos17pi64n2sin23pi32n defining signalxnb1 1 0833 0166 Numerator coefficients of FIR filterHza1 1    See Answer
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