Unformatted text preview: . H1(ej) H2(ej) 6
x[n] 3 H1(ej) 3 y[n] x[n] H2(ej) y[n] xc(t) ) . yc(t) xc(t) 7 (  N 
xc(t) C/D T1 yc(t) 3 D/C T2 = T1/3 (
T1 T2 T2 = T1 ( T2 = 2T1/3 ( N X3[k] X1[K] N x[n] 8 X3[k] X1[k] x[n] 3N .(x[n] = 0; n < 0 , n P) P x[n] 9 k 2k , k 0, 1, , N 1 N (DTFT) N N . .N > P ( . N < P (
16 X[k] 8 (DFT) 8 x[n] 10 n . y[n] x 2 , n even 16 y[n] . 0, n odd . Y[k] 16 (DFT) . Z (DFT) 11 10 X(z) x[n] 10 X(z) . 17 1 2 x1[n] x1[n] x[n] . X ( z ) z 0.5e j ( 2 k / 10 / 10 ) 27 . X(z) : 8 n 12 1 3 . x2 [n] cos n, 0 n 7 x1[n] , 0 n 7 ( 8 2
2 1 . x2 [n] cos n, 0 n 7 x1[n] , 0 n 7 ( 8 2
n x2[n] . X 1 ( z ) X 2 [k ] X 1 ( z )
z e
j 2 k N 1 x1[n] Z 1 az 1 13 , k 0,1,..., N 1 N (DFT) N . x2[n]...
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 Spring '08
 WIDNI

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