参考资料视频: https://www.youtube.com/watch?v=i1n_euUse1o 须要富强 这里我举一个栗子 求 f 1 ( t ) ∗ f 2 ( t ) 求f_{1}(t) * f_{2}(t) 求f1(t)∗f2(t) f 1 ( t ) = 2 [ ε ( t ) − ε ( t − 1 ) ] f_{1}(t)=2 [\varepsilon(t)-\varepsilon(t-1)] f1(t)=2[ε(t)−ε(t−1)] f 2 ( t ) = ε ( t ) − ε ( t − 2 ) f_{2}(t)=\varepsilon(t)-\varepsilon(t-2) f2(t)=ε(t)−ε(t−2) 编辑公式有点累 我手写吧 啊哈哈 而后这就是以上解题的过程 准确答案以下 f 1 ( t ) ∗ f 2 ( t ) = 2 t ε ( t ) − 2 ( t − 1 ) ε ( t − 1 ) − 2 ( t − 2 ) ε ( t − 2 ) + 2 ( t − 3 ) ε ( t − 3 ) \begin{array}{l}{f_{1}(t) * f_{2}(t)=} {2 t \varepsilon(t)-2(t-1) \varepsilon(t-1)-2(t-2) \varepsilon(t-2)+2(t-3) \varepsilon(t-3)}\end{array} f1(t)∗f2(t)=2tε(t)−2(t−1)ε(t−1)−2(t−2)ε(t−2)+2(t−3)ε(t−3) 完毕html