il)单音调制时调角波表达式 FM a(t)=@+klom cos 2t O+△o.cost AOmn=4r(amn(最大角频偏) △a (1)=o(1d=0+ 0 -AOm Ot+ M. sin g2t=Ot+△ △ f Q(调频波的调制指数) A V Cm cos(a t+M sin 2t)ii)单音调制时调角波表达式 FM: c f m ( ) cos t k V t = + Ω c m = + cosΩt (最大角频偏) m c 0 ( ) ( )d sin t t t t t t = = + Ω Ω sin c f c = + = + t M t t Ω (调频波的调制指数) m f Ωm = k Vm f Ω M =