# 2 - E PI.22)icted in Figure P l.—...

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Unformatted text preview: E PI .22 )icted in Figure P l. . .— ‘l .-’_’.""—H“‘- "LU-3} i ﬁrms; Kuhn/- .r" -._ iii. “Determine whether or not each of the following continuous-time signals is periodic. Ifﬁthe signal is periodic, determine its fundamental period. @ 35(1) = 3 eos(4t + g) Q) x0) ... aim-1) {c}? x(t) = [cos(2t — 3%)]2 - ((1)3 x(t) = 8u{cos(4m)a(t)} Figure P1 .24 DU (e) no =_~8w{sin(4m)u(o} (n x0) = Z e“f‘"”)u(2r — 21) n=—oo @iDetermine-whether or not each of the following discrete-time signals is periodic. If L/ the signal is periodic, determine its fundamental period. @ x[n] = sinésn + 1) go x[n] = was r 11') (c) x[n] = conga?) (d) x[n] = cos(%n) con-En) (§}__”..x[n] = 2cos(§{-n) + sing-n) -* Zcosgn + g) 1.27.. In this chapter, we introduced a number of general properties of systems. In partic- ular..- a system may or may not be (1) Memoryless (2) Time invariant (3) Linear ,123 (4) Causal (5) Stable . . . _ . Determine which of these properties hold and which do not hold for each of the ducted 111 F1811“? f ' 1 ' following continuous-time systems. Justify your answers. In each example, y(t) de- notes the system output and r(t) is the system input. ...
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