2.交变波4n()的功率谱密度 P(a)=P(1-p)G(f)-G2(f) 3.S(t)的功率谱密度 p.(0)=p,(0)+p,() fp(1-p)G(/)-G2(f) +∑pG(m/)+(1-P)G2(m,)(-mf (1)单极性波形设g(t)=0P g,(t)=g(t) G,(=TSa(T) 0其7 2. 交变波 的功率谱密度 3. 的功率谱密度 (1)单极性波形 设 u (t) T s u T p p p G f G f 1 ( ) (1 ) ( ) ( ) 2  = − 1 − 2 s(t) () () () ps = pu + pv 2 1 2 f p(1 p)G ( f ) G ( f ) = s − − 2 1 2 +  [ ( ) + (1− ) ( )]  m=− s pG mf s p G mf s f ( ) mf s  f − g1 (t) = 0      = = 0 其它 2 1 ( ) ( ) 2 TS t g t g t 2 1 P = ( ) ( ) 2 s s G f = T Sa fT