摘要
本文就PFM三种调制方式的频谱特点以及系统信噪比性能进行了分析,给出了实行倍频PFM光纤视频传输系统的方案以及方波调频和延迟倍频的具体电路。本系统硬件集成度高,无中继距离长,具有较高的性能价格比,可大量推广使用。
The spectrum characters of three kinds of PFM modulation andthe signal-to-noise ratio properties of the system have been analysed in thispaper. The design of realizing the double frequency PFM optical videotransmission system and the circuits of square wave frequency modulationand double frequency delay have also been given. The system possesseshigh integrated level, long distance without repeater, and high perfomanceprice ratio. It can be popularized.
出处
《光通信技术》
CSCD
1991年第3期140-144,共5页
Optical Communication Technology
关键词
视频传输系统
倍频式
光纤
PFM
Spectrum Square wave frequency modulation Double frequency Signal-to-noise ratio
