| FD-PFM光纤载波传输系统中信噪比理论推导 |
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| 引用本文： | 张理招,张宝源.FD-PFM光纤载波传输系统中信噪比理论推导[J].解放军理工大学学报,1992(2). |
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| 作者姓名： | 张理招 张宝源 |
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| 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。
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| 关 键 词： | 脉冲频率调制 信噪比 噪声脉冲 相关函数 |
Signal-to-Noise Ratio Formula Used in Optical Fiber Transmission Carrier Channel Systememploying FD-PFM |
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| Zhang Lizhao Zhang Baoyuan.Signal-to-Noise Ratio Formula Used in Optical Fiber Transmission Carrier Channel Systememploying FD-PFM[J].Journal of PLA University of Science and Technology(Natural Science Edition),1992(2). |
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| Authors: | Zhang Lizhao Zhang Baoyuan |
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| Institution: | Zhang Lizhao Zhang Baoyuan |
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| Abstract: | 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. |
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| Keywords: | pluse-frequence-modulalon (PFM) signal-to-noise ratio (SNR) noise-pluse related function |
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