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100G线路传输技术及产业链条已经发展成熟,目前已成为网络运营商应对几何式带宽需求增长的最佳解决方案。PDM—QPSK调制及相干检测技术被OIF国际标准化组织确定为100Gbit/s长距离传输的标准收发方式。本文将对光信号码型选择、FEC软/硬判决、发端DSP等100G相干传输的关键技术进行介绍。 相似文献
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通过总结广东电信现有波分传输平台特别是40G系统在部署和维护实践过程中发现的问题,从业务增长和传输技术发展的角度,说明了广东电信波分网络应逐步停止40G网络建设并向100G网络演进的趋势,进而在100G网络的建设模式、网络技术应用、网络维护注意事项等方面提出了意见和建议。 相似文献
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Multi-user optical code division multiplexing (OCDMA) in visible light communication (VLC) is an imminent domain for providing an even distribution of available bandwidth and improved security. Q4R1Zero cross-correlation (ZCC) codes are widely reported, and improved performance is offered by them due to insignificant multiple access interference (MAI). However, practically, MAI exists in ZCC codes due to adjacent weights (W) in the code matrix rows for each user. Therefore, a novel ZCC code with a nonadjacent W is designed in this work to eradicate MAI limitations and is named weight managed ZCC codes (WMZCC). An indoor 100 Gbps/User OCDMA-VLC system is realised using polarisation division multiplexed quadrature phase shift keying (PDM-QPSK) and digital signal processing (DSP). Incorporation of DSP in the coherent receiver compensates the effects of dispersion and nonlinear effects and also performs phase estimation. Further, a state-of-the-art comparison of WMZCC codes with diagonal identity matrix (DIM) and zero cross-correlation resultant weight (ZCCRW) codes has been performed in terms of log symbol error rate (SER), Q factor, error vector magnitude percentage (EVM%) and log bit error rate (BER) log at different VLC lengths, Q4R1Transmitter half angles (THA), incidence half angles (IHA) and optical concentrators (cm2). Constellations are analysed with and without DSP, and according to the author's best knowledge, a 100 Gbps VLC system for five users covering 6 m at −3.42 log BER is demonstrated for the first time. Results revealed that weight management in WMZCC codes makes its performance improve as compared with ZCCRW and DIM codes. 相似文献
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在介绍100G WDM系统标准现状的基础上,从传输、调制、映射封装、接口等方面阐述了100G WDM系统的关键技术及解决方案,最后重点介绍了100G WDM系统的关键技术的解决方案。 相似文献
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