The periodic impulse train signal Pw.(w) = ws 8(w – kws) k=- is sketched below: (ولی) (ws) (ws) (ws) (ws) Pws (w) w -2ws

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The periodic impulse train signal Pw.(w) = ws 8(w – kws) k=- is sketched below: (ولی) (ws) (ws) (ws) (ws) Pws (w) w -2ws والدا - 0 ws 2ws (a) Suppose the signal x(t) has the following spectrum: 1 XW) . الي -4 4 - * Sketch Y (W) = Pws (W) * X(w) for ws = 10. (b) What is the smallest value of ws for which the signal x(t) can be recovered from Y(w) = Pws (W) * X(w)? (c) Specify a filter H(w) that can be used to reconstruct x(t) from Y(w) in part (a). *