推 OKOK98:OKOK謝謝 09/18 14:53
※ 引述《OKOK98 (UTN)》之銘言：
: Let x(t)=cos(t)u(t) where u(t) denotes the unit step (Heaviside step)
: function.Find the concatenated convolution x(t)*u(t)*u(t-1) using
: Laplace transform method ,where * is the convolution operator.
L{ x(t)*u(t)*u(t-1) }
s 1 1 -s
= ───── ── ── e
s^2 + 1 s s
-s 1 -s
= (──── + ────) e
s^2 + 1 s
-1
L => u(t-1) - cos(t-1) u(t-1)
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