Consider a discrete-time LTI system for which the frequency response H(ejω) is described by:
(a) Is the impulse response of the system h[n] real-valued? (i.e., is h[n] = h∗[n] for all n)
(b) Calculate the following:
(c) Determine the response of the system to the input x[n] = s[n] cos(ωcn), where 0 < ωc < π/2 and S(ejω) = 0 for ωc/3 ≤ ω| ≤ π.
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