线性时不变系统(8)

线性时不变系统

y (kT ) =

∫τ

∞ =0

g (τ )u (kT τ )dτ

线性时不变系统传递函数 我们定义q算子

qu (t ) = u (t + 1) 同样q 1u (t ) = u (t 1)

(2.9)

(2.10)

那么(2.6)就可以写成y (t ) =∞ k =1

∑ g (k )u(t k ) =∑ g (k )qk =1

∞

k

u (t )

(2.11)

∞ k = g (k )q u (t ) = G (q )u (t ) k =1

∑