FD-PFM光纤载波传输系统中信噪比理论推导  

Signal-to-Noise Ratio Formula Used in Optical Fiber Transmission Carrier Channel Systememploying FD-PFM

作　　者：张理招 张宝源 

出　　处：《工程兵工程学院学报》1992年第2期83-89,共7页

摘　　要：本文讨论了利用光纤传输大通路载波信号的调制方式。经研究在接收端的解调以前采用SWFM方式,然后再将SWFM信号经倍频变换成PFM信号的调制方式较为有利。并着重讨论了倍频—脉冲频率调制的信噪比公式,得出有3dB解调增益的结论。In this paper, a modulation method for carrier channel with large capacity in optical fibre transmission is discussed. It is more desirable that sguare-wave-Freguency-Modulation (SWFM) method be used first, and afterwards, SWFM signal be converted by a frequency doubler into a Pulse-Frequency-Modulation signal before if is demodulated at the receiving end. The formula of signal-to-noise ratio in Frequency-Doubling-Pulse-Frequency-Modulation method is discussed in detail and a conclusion of 3dB demodulafion gain is reached.

关 键 词：脉冲频率调制 信噪比 噪声脉冲 相关函数 

分 类 号：N55[自然科学总论]