第4次作业讲è¯

第4次作业讲è¯

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[email protected] 1 s 4 ( ( ( ) ( ) ( ) ( LTI 1 . 2 10 10 t y e a t x j H k t jk k - = = π ϖ t π jk t π jk e jk H e ) ( π - = 5 0 4 5 1 ) ( k k k jk H π - = - = 4 4 5 1 ) ( k t jk k e a k t y π
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[email protected] 2 s 4 X 3.2 s FS s ) 4 sin( ) 2 cos( ) ( ) 1 ( t t t x + = 2 0 = = ϖ π T ( 29 ( 29 t j t j t j t j e e j e e t x 4 4 2 2 2 1 2 1 ) ( - - - + + = 2 1 1 = ± a j a 2 1 2 ± = ± ) 2 ( < < - - < < = 0 2 2 2 0 2 ) ( t T E T t E t x y
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[email protected] 3 s 4 8 3.2 s FS s ) 4 sin( ) 2 cos( ) ( ) 1 ( t t t x + = 2 0 = = ϖ π T ( 29 ( 29 t j t j t j t j e e j e e t x 4 4 2 2 2 1 2 1 ) ( - - - + + = 2 1 1 = ± a j a 2 1 2 ± = ± ) 2 (
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