摘要
本文详细地研究了方波频率调制(SWFM)传输系统的性能。导出了用于SWFM视频传输系统信噪比(SNR)的简单计算公式。对SWFM系统的SNR性能进行了理论分析。在1.3和0.8μm波长处用SWFM进行了视频双伴音传输实验。讨论了光纤传输特性对SNR性能的影响。该系统的主要技术指标已达到美国GVG公司3291机的水平,而价格约为该机的三分之一。其性能价格比已具有竟争力,可以大量推广应用。
The performance of a fiber-optic transmission system mo-
dulated by square-wave FM is researched in detail. A simple fomula for
calculation of signal-to-noise ratio (SNR) is deduced and the theoretical
analysis of the SNR properties is given. After carrying out simultaneous
video transmisson experiments at 1.3μm and 0.8μm, we disussed the inf-
luence of fiber transmission charter on SNR. The system has reached the
the level of Model'3291' which is made by U.S GVG Corp.in mainpe rf-
ormance indexes with one third of the price. The system may be spreaded
according to its competitive cost performance.
出处
《光通信技术》
CSCD
1989年第4期9-14,共6页
Optical Communication Technology
关键词
方波频率调制
视频传输
信噪比
Square Wave Frequency Modulation
Signal-to-Noise Ratio
Linearity
