如e(t)= E cos(t-q1 a(t)=[Ao + ke(t)]cos(oct-) 6×、人COS(t-91)]os(@t-9) Ao[1+m cos(S2t-(P,)]cos(oct-(p) 而对多频调幅,设 e(t)=2Em. cos( nS2t-(n) n=1如 ( ) cos( ) = Ω − ϕ1 e t E t m 则 [1 cos( )]cos( ) ( ) [ ( )]cos( ) 1 0 0 0 c c m c c t t A kE A a t A ke t t ϕ ω ϕ ω ϕ = + Ω − − = + − [1 cos( )]cos( ) 0 1 c c = A + m Ωt − ϕ ω t − ϕ 东南大学移动通信国家重点实验室 而对多频调幅，设 ∑ ∞ = = Ω − ϕ 1 ( ) cos( ) n m n e t E n t n