关于角度调制中的过调失真的一点注记

• 作 者: 张孝强
• 出 处: 南京邮电学院学报
• 发表日期: 1983年01期
• 关键词: 角度调制 调频 调相 检波器 幅度调制 调制信号 包络 失真 非相干解调 解调器

众所周知,对于幅度调制中的调制信号m(l)=A_0+f(t),解调器采用线性包络检波器时当A_0<|f(t)|_(max)便产生过调失真。本文指出在角度调制中同样存在过调失真的可能性,当ω_c≥K_(FM)|f(t)|_(max)(对于调频而言)、ω_c≥K_(PM)■_(max)(对于调相而言)时,过调失真可以避免。

It is well-known that for a modulated signal m (l) = A_0 + f (t) in amplitude modulation, an over-distortion occurs when A_0 <| f (t) | _ (max) is used by the demodulator with a linear envelope detector. This paper points out that there is a possibility of over-distortion in the angle modulation. When ω_c≥K_ (FM) | f (t) | _ (max) (for frequency modulation), ω_c≥K_ (PM) (For phase modulation), over-distortion can be avoided.