第2章(1)

Com 11 s2 2 l ti r xt h1 t h2 t

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Unformatted text preview: t < −1s shi9876@hzcnc.com 7 s2 ∫ ∞ −∞ LŸ TI øÀ * Qª x(τ )h(t − τ )dτ = 0 ( 2) − 1 < t < 1 y ∫ ∞ −∞ x(τ )h(t − τ )dτ = 2(t + 1) (3) 1 < t < 2 ∫ ∞ −∞ x(τ )h(t − τ )dτ = 4 shi9876@hzcnc.com 8 s2 L• TI èÀ * ƒª (5) t > 4 T ∫ ∞ −∞ x(τ )h(t − τ )dτ = 0 2(t + 1) − 1 < t < 1 4 1< t < 2 x(t ) * h(t ) = 2( 4 − t ) 2 < t < 4 0 other ∞ y (t ) = x(t ) * h(t ) = ∫ x(τ )h(t − τ )dτ −∞ shi9876@hzcnc.com ∞ y (0) = ∫ x(τ )h(−τ )dτ −∞ 9 s2 LŸ TI XÀ * Qª shi9876@hzcnc.com 10 s2 LŸ TI À * Qª 2.1.4 Ÿ Q* ªÀ 1 ˜i (1) x(t ) * h(t ) = h(t ) * x(t ) ∞ x(t ) * h(t ) = ∫ x(τ )h(t − τ )dτ −∞ ∞ h(t ) * x(t ) = ∫ h(τ ) x(t − τ )dτ −∞ ª À Ÿ6 *Q shi9876@hzcnc.com 11 s2 ( 2) LŸ TI À * Rª [ x(t ) * h1 (t )] * h2 (t ) = x...
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This note was uploaded on 08/22/2011 for the course EE 201 taught by Professor Yhm during the Spring '05 term at Zhejiang University.

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