Determine whether the following discrete-time signals are periodic or not. If periodic, determine the fundamental period. (a) sin (0.02an) (b) sin...
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Determine whether the following discrete-time signals are periodic or not. If periodic, determine the fundamental period. (a) sin (0.02an) (b) sin (5an) 2an 2n n (c) cos 4n (d) sin + cos 3 5 (e) cos " ) cost: (f) cos - +0.3n 6 2 (g) el(x/2)n (h) 1tej2ani3 _ jaan/7

An interconnection of LTI systems is shown in Figure 2.14. The impulse responses are hi(n) = (1/2)" [u(n) - u(n - 4)]; h2(n) = 6(n) and h3(n) = u(n - 2). Let the impulse response of the overall system from x(n) to y(n) be denoted as h(n). (a) Express h(n) in terms of hi(n), h2(n) and h3(n). (b) Evaluate h(n). h,(n) x(n) y(n) h (n) h, (n) Figure 2.14 System for Example 2.26.

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