隧道环境单根泄漏电缆MIMO系统的性能测量  

Measurements of MIMO system using single-leaky coaxial cable in tunnel environment

作　　者：匡震 尹晓宇 武艺鸣 郑国莘[1] KUANG Zhen;YIN Xiaoyu;WU Yiming;ZHENG Guoxin(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200444

出　　处：《上海大学学报（自然科学版）》2019年第2期171-179,共9页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金重点资助项目(61132003);国家自然科学基金面上资助项目(61571282)

摘　　要：通常多输入多输出(multiple-input multiple-output, MIMO)系统需要两根以上泄漏电缆来传输不同信息流.研究隧道环境下单根泄漏电缆双向馈入构成2×2 MIMO系统的性能.测量结果发现,单根泄漏电缆MIMO系统的容量与双根泄漏电缆构成的MIMO系统接近,明显优于单输入单输出(single-input single-output, SISO)系统.研究结果可为轨道交通系统LTE-M通信专网设计提供参考.Usually, a multiple-input multiple-output (MIMO) system needs to deploy more than two leaky coaxial cables (LCXs). A 2×2 MIMO system using a single LCX as transmitters was measured. Signals are fed from both ends of the LCX port separately, which can be used as two antennas. The results show that the performance of a single LCX system is close to that with two LCXs, and is much better than a single-input single-output system. The conclusion provides a reference for the design of LTE-Mprivate communication networks.

关 键 词：泄漏电缆 地铁长期演进系统 多输入多输出 信道容量 通信系统 

分 类 号：TN92[电子电信—通信与信息系统]