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首页> 外文期刊>Optical fiber technology >Power budget of direct-detection ultra-dense WDM-Nyquist-SCM PON with low-complexity SSBI mitigation
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Power budget of direct-detection ultra-dense WDM-Nyquist-SCM PON with low-complexity SSBI mitigation

机译：低复杂度SSBI缓解的直接检测超密集WDM-Nyquist-SCM PON的功率预算

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摘要

The power budget (PB) of a direct-detection ultra-dense wavelength division/subcarrier multiplexing (SCM) passive optical network (PON) is assessed numerically for downstream, when a low-complexity iterative signal-to-signal beat interference (SSBI) mitigation technique is employed. Each SCM signal, inserted in a 12.5 GHz width optical channel, is comprised of two or three electrically generated and multiplexed 16-quadrature-amplitude-modulation (QAM) or 32-QAM Nyquist pulse-shaped subcarriers, each with a 7% forward error correction bit rate of 10.7 Gbit/s. The PB and maximum number of optical network units (ONUs) served by each optical line terminal (OLT) are compared with and without SSBI mitigation. When SSBI mitigation is realized, PB gains up to 4.5 dB are attained relative to the PB in the absence of SSBI mitigation. The PB gain enabled by the SSBI mitigation technique proposed in this work increases the number of ONUs served per OLT at least by a factor of 2, for the cases of higher spectral efficiency. In particular, for a SCM signal comprised of three subcarriers, the maximum number of ONUs served per OLT is between 2 and 32, and between 8 and 64, in the absence of SSBI mitigation, and when SSBI mitigation is employed, respectively, depending on the fiber length (up to 50 km) and order of QAM. (C) 2017 Elsevier Inc. All rights reserved.
机译：当低复杂度迭代信号对信号拍频干扰（SSBI）时，对下游的数字信号直接评估超密集波分/子载波多路复用（SCM）无源光网络（PON）的功率预算（PB）采用了缓解技术。插入到12.5 GHz宽度的光信道中的每个SCM信号均包含两个或三个电生成的多路复用的16正交幅度调制（QAM）或32-QAM奈奎斯特脉冲状子载波，每个子载波具有7％的前向误差校正比特率为10.7 Gbit / s。在有和没有SSBI缓解的情况下，将比较每个光线路终端（OLT）服务的PB和最大数量的光网络单元（ONU）。当实现SSBI缓解时，相对于没有SSBI缓解的PB，PB增益可达到4.5 dB。在频谱效率更高的情况下，这项工作中提出的SSBI缓解技术使PB增益可使每个OLT服务的ONU数量至少增加2倍。尤其是，对于由三个子载波组成的SCM信号，每个OLT服务的ONU的最大数量分别在不使用SSBI缓解措施的情况下以及使用SSBI缓解措施的情况下分别为2至32和8至64之间，具体取决于光纤长度（最长50 km）和QAM的顺序。 （C）2017 Elsevier Inc.保留所有权利。

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