面向2G/3G/4G/WLAN融合接入应用的光载无线分布式天线系统

[摘要] 文章认为满足2G/3G/4G/WLAN四网融合业务的多样性、多业务等级、高品质要求，需要建设能够实现宽带接入的光载无线分布式天线网络。为了实现低成本、高性能、多业务融合接入的光载无线(ROF)分布式天线网络，文章基于商用的千兆以太网光器件，设计了低成本、宽带的光收发模块；利用光损耗和受激布里渊散射(SBS)效应对链路传输性能的影响，基于激光器线宽展宽技术，抑制了受激布里渊散射效应；采用副载波复用技术，实现了点到点的多业务混合传输；采用粗波分复用技术，实现了点到多点的多业务分布式传输。

[关键词] 四网融合；光载无线；光收发模块；光损耗；受激布里渊散射；副载波复用；粗波分复用

[Abstract] To provide diversity and high quality for 2G, 3G, 4G and WLAN converged services, we propose radio-over-fiber-based distributed antenna network (ROF-DAS) for broadband access. We design and fabricate low-cost broadband ROF transceivers based on commercial off-the-shelf 10 GbE optical components. These transceivers are designed to provide low-cost, high performance ROF-DAS with converged multiservice access. In this paper, we characterize the effects of optical loss and Stimulated Brillouin Scattering (SBS) on transmission performance. We also describe a way of broadening the laser linewidth to suppress SBS. Subcarrier multiplexing is used to achieve point-to-point multi-service hybrid transmission, and coarse wavelength division multiplexing is used to realize point-to-multipoint multiservice distributed transmission.

[Keywords] four networks convergence; radio-over-fiber; transceivers; optical loss; stimulated Brillouin scattering; subcarrier multiplexing; coarse wavelength division multiplexing