连续周期信号的FT 时域单脉冲周期重复,等于频域抽样 bi2Floosno, =IFn Fo(O)=EzS z 2 FTLf()=2n∑Fnb(O-m1) EτO1 ∑ sal not(o-nO) 1=-06 连续周期信号的FT ——时域单脉冲周期重复，等于频域抽样 例2       = 2 ( ) 0  F  ESa F0 n T1 Fn 1 () =  = [ ( )] 2 ( )  F   n1 FT f t n =  n −  =− ( ) 2 1 1 1        n n E Sa n  −        =−