父7.1调频信号和调相信号 △oc=ku(t) =k Uom cost =△0mc0s2t ω(t) @(1)=@c+A@c Wc =0c+△0ncos2t 0 UFM=Um cos(at+m singt+o) 调频信号波形 cos cos C f f m m k u t k U t t cos C C C m t t uFM Usm cosC t mf sint 0 7.1 调频信号和调相信号