作者eelce (:p)
站内Electronics
标题[题目] 讯号与系统
时间Fri May 2 23:15:44 2008
[领域] 讯号与系统
[来源] oppenheim
[题目] 习题1.27 1.28
Memoryless, Time invariant, Linear, Causal, Stable
determine which of these properties hold or not
1. y(t) = x(t-2) + x(2-t)
2. y(t) = ∫x(τ)dτ (from -∞ to 2t)
[瓶颈] why do time invariant not hold for both?
1.
y1(t) = x1(t-2) + x1(2-t)
let x2(t)=x1(t-t0)
y2(t) = x1(t-t0-2) + x1(2+t0-t) = y1(t-t0)
错了吗QQ
2.
[题目] 习题1.30
find the inverse system if it is exited
1. y(t) = ∫e^-(t-τ) x(τ) dτ (from -∞ to t)
[瓶颈] how to figure out x(t) = y(t) + dy(t)/dt
我只会算discrete的
解答只给答案Orz
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※ 编辑: eelce 来自: 118.160.111.66 (05/03 00:28)