将前两个式子带入第三个式子,关键把握住一点,关于冲击函数的性质:
d(t-n)*x(t)=d(t-n)*x(n).
所以有d(w+1)*(1/w)=d(w+1)*(1/(-1)), d(w-1)*(1/w)=d(w-1)*(1/(+1)),
d(w+1)*d(w)=0, d(w-1)*d(w)=0.
将前两个式子带入第三个式子,关键把握住一点,关于冲击函数的性质:
d(t-n)*x(t)=d(t-n)*x(n).
所以有d(w+1)*(1/w)=d(w+1)*(1/(-1)), d(w-1)*(1/w)=d(w-1)*(1/(+1)),
d(w+1)*d(w)=0, d(w-1)*d(w)=0.