第9章模拟信号的数字传输 (1)时域表达式:ms(t)=m(t)δ(t) (2)频谱(T=1f) M,(o)=[wo*Goj】 6.o 22s,(@-mo,) Ms(@)-TIM(@)*E6.(@-n@)l -72a-m,】 55 第9章模拟信号的数字传输 (1)时域表达式: mS (t)= m(t)δT (t) (2)频谱(T=1/f s) [ ( ) ( )] 2 1 ( ) MS = M T ( ) 2 ( ) S n T T n T = − =− [ ( ) ( )] 1 ( ) S n S M T n T M = − =− ( )] 1 S n M n T = − =−