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中兴通讯技术（英文版）
中兴通讯技术（英文版）

谢大雄

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中兴通讯技术（英文版）/Journal ZTE Communications
查看更多>>ZTE　Communications is a quarterly publication, edited, published and distributed by the Corporate Branding and Communications Department of ZTE Corporation. The magazine focuses on hot telecom topics and front-line telecom technologies, with the sections of “Special Topic”, “Operational Application”, “Research Paper”, “Development Field” and “Lecture Series”. It is a worthwhile magazine for telecom operators and partners of ZTE Corporation alike. The magazine is mainly distributed to telecom operators, science and technology research institutes, relevant government departments, and colleges and universities.
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    Filter Design of Wireless Base Station Power Supply

    LI WeiGUO WeiWANG Zhida
    95-105页
    查看更多>>摘要：The design of electromagnetic interference(EMI)filters needs to fulfill the EMI standards.Designing a filter is a time-consuming process for new engineers as well as for those experienced engineers.This paper measures and compares the noise spectrum of the wireless base station power prototype with and without the original filter.The ideal insertion loss(IL)of the original filter is obtained by combining cal-culation and simulation.It is pointed out that the effect of the original filter is not good.Based on the improved insertion-loss method,the source impedance model of the prototype is established by combining measurement and theory.A procedure for designing EMI filters for switch power supply will be presented.The filter design procedure makes it possible to design filters quickly and easily.Finally,the proposed filter design method is proved to be effective by the EMI measurement of the wireless base station power supply prototype.
      原文链接:
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    • NSTL
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    Real-Time 4-Mode MDM Transmission Using Commercial 400G OTN Transceivers and All-Fiber Mode Multiplexers

    REN FangLI YidanYE BingLIU Jianguo...
    106-110页
    查看更多>>摘要：Weakly-coupled mode division multiplexing(MDM)technique is considered a promising candidate to enhance the capacity of an optical transmission system,in which mode multiplexers/demultiplexers(MMUX/MDEMUX)with low insertion loss and modal crosstalk are the key components.In this paper,a low-modal-crosstalk 4-mode MMUX/MDEMUX for the weakly-coupled triple-ring-core few-mode fiber(TRC-FMF)is designed and fabricated with side-polishing processing.The measurement results show that a pair of MMUX/MDEMUX and 25 km weakly-coupled TRC-FMF MDM link achieve low modal crosstalk of lower than-17.5 dB and insertion loss of lower than 11.56 dB for all the four modes.Based on the TRC-FMF and all-fiber MMUX/MDEMUX,an experiment for 25 km real-time 4-mode 3-λ wavelength divi-sion multiplexing(WDM)-MDM transmission is conducted using commercial 400G optical transport network(OTN)transceivers.The experi-mental results prove weakly-coupled MDM techniques facilitate a smooth upgrade of the optical transmission system.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

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      原文链接:
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    • NSTL
    • 万方数据