The impulse response of a causal LTI discrete-time system is (a) If the input of the system
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(a) If the input of the system is a pulse x[n] = u[n] u[n 3], determine the length of the output of the system y[n]. Graphically calculate the output of the system y[n] as the convolution sum of x[n] and h[n].
(b) Determine the transfer function H(z) of the system. Is this system BIBO stable? Explain.
(c) Suppose you want to recover x[n] from the output y[n] by cascading a system with tranfer function HÌ(z) to the given system with transfer function H(z). What should HÌ(z) be equal to? Is the cas-caded system with HÌ(z) as transfer function BIBO stable? Can you guarantee recovery of the original signal x[n]? Explain.
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