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首页> 外文期刊>IEEE Transactions on Information Theory >Models and Information Rates for Multiuser Optical Fiber Channels With Nonlinearity and Dispersion
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Models and Information Rates for Multiuser Optical Fiber Channels With Nonlinearity and Dispersion

机译：具有非线性和色散的多用户光纤信道的模型和信息速率

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摘要

Two discrete-time interference channel models are developed for information transmission over a single span of optical fiber using wavelength-division multiplexing (WDM) and lumped amplification. The models are derived from the nonlinear Schrödinger equation by including the nonlinear phenomena of self-phase modulation (SPM) and cross-phase modulation (XPM), but ignoring four-wave mixing, polarization effects and group velocity dispersion (GVD) within WDM bands. The first model also ignores GVD across WDM bands, referred to as group velocity mismatch (GVM). For the case of two users, a new technique called interference focusing is proposed where each carrier achieves the capacity pre-log 1, thereby doubling the pre-log of 1/2 achieved by using conventional methods. For three users, interference focusing is also useful under certain conditions. The second model captures GVM and the effect of filtering at the receivers in addition to SPM and XPM. In a 3-user system, it is shown that all users can achieve the maximum pre-log factor 1 simultaneously by using interference focusing, a time-limited pulse and a bank of filters at the receivers.
机译：开发了两个离散时间干扰信道模型，用于使用波分复用（WDM）和集中放大在单个光纤跨段上进行信息传输。通过包括自相位调制（SPM）和交叉相位调制（XPM）的非线性现象，从非线性Schrödinger方程导出模型，但忽略了WDM频段内的四波混频，极化效应和群速度色散（GVD） 。第一个模型还忽略了WDM频段上的GVD，称为组速度失配（GVM）。对于两个用户的情况，提出了一种称为干扰聚焦的新技术，其中每个载波都达到容量预记录1，从而使使用传统方法获得的1/2的预记录倍增。对于三个用户，在某些条件下干扰聚焦也很有用。第二种模型除了捕获SPM和XPM之外，还捕获GVM以及接收器处的滤波效果。在三用户系统中，通过使用干扰集中，限时脉冲和接收器处的滤波器组，所有用户都可以同时达到最大对数因子1。

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