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第2章(2)

第2ç«&n...

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[email protected] 1 h 2 LTI 2.2 LTI 3 2.2.1 Py -∞ = - = k k n k x n x ] [ ] [ ] [ δ + - + + + - + = - -∞ = ] 1 [ ] 1 [ ] [ ] 0 [ ] 1 [ ] 1 [ ] [ ] [ n x n x n x k n k x k δ δ δ δ ] [ ] [ -∞ = - k k n k x δ
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[email protected] 2 h 2 LTI ] [ ] [ n u n n n δ = -∞ = - = - = 0 ] [ ] [ ] [ ] [ k k k n k n k u n u δ δ 2.2.2 LTI h 1 hI ] [ ] [ ] [ ] [ n h n y n n x zs = = ξ δ 2 h h [ n ] ) h ] [ ] [ n h n δ ] [ ] [ k n h k n - - δ ] [ ] [ ] [ ] [ k n h k x k n k x - - δ
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[email protected] 3 h 2 LTI -∞ = -∞ = - - k k k n h k x k n k x ] [ ] [ ] [ ] [ δ ] [ * ] [ ] [ ] [ ] [ ] [ n h n x k n h k x n y n x k zs = - = -∞ = 3 ] [ * ] [ ] [ ] [ ] [ 1 0 ] [ ] [ n h n x n y n u n h a n u a n x n = = < < = -∞ = - = = k k n h k x n h n x n y ] [ ] [ ] [ * ] [ ] [ h ] [ 1 1 ] [ ] [ ] [ 1 0 n u a a a n u k n u k u a n n k k k k - - = = - = + = -∞ =
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[email protected] 4 h 2 LTI ] [ * ] [ ] [ ] [ ] [ n h n x n y n h n x = -∞ = - = = k k n h k x n h n x n y ] [ ] [ ] [ * ] [ ] [ h
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[email protected] 5 h 2 LTI 2.2.3 1 h Î ] [ * ] [ ] [ * ] [ ) 1 ( n x n h n h n x = ( 29 ( 29 ] [ * ] [ * ] [ ] [ * ] [ * ] [ ) 2 ( 2 1 2 1 n h n h n x n h n h n x = ( 29 ] [ * ] [ ] [ * ] [ ] [ ] [ * ] [ ) 3 ( 2 1 2 1 n h n x n h n x n h n h n x + = + ] [ ] [ 2 n u n δ ] [ ] [ ] [ ] [ * ] [ ) 1 ( n x k n k x n n x k = - = -∞ = δ δ ] [ ] [ ] [ ] [ 0 0 0 n n n x n n n x - = - δ δ ] [ ] [ ] [ 0 0 n x n n n x n = - -∞ = δ
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[email protected] 6 h 2 LTI ] [ ] [ n n h δ = ] [ ] [ ] [ ] [ * ] [ 0 0 0 n n x n k n k x n n n x k - = - - = -
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