采用双漏缆覆盖的轨道交通LTE-M系统信道的测量研究  

Channel measurement and research on LTE-M rail transit system using deployment of double leaky coaxial cables

作　　者：郑国莘[1] 林苏燕 武艺鸣 蓝燕锐 徐宗铭 匡震 

机构地区：[1]上海大学通信与信息工程学院特种光纤与光接入网重点实验室,上海200072 [2]中天科技射频电缆有限公司,南通226010

出　　处：《电波科学学报》2016年第5期906-911,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金重点项目(61132003);国家自然科学基金面上项目(61571282)

摘　　要：下一代轨道交通系统将采用LTE-M系统,并采用多根漏泄电缆(简称漏缆)组成多入多出(Multiple Input Multiple Output,MIMO)系统.因此,需要研究漏缆设置与系统性能之间的关系。依据时域信道测量方法与MIMO信道相关理论,在典型的类地铁隧道环境中,测量并分析了1.8GHz频段下基于双根漏缆覆盖的MIMO系统性能,通过测量不同极化方式下的漏缆和接收天线以及不同漏缆间距下的信道信息,分析了信道相关性,发现当接收机天线垂直极化而双漏缆同采用水平极化时MIMO性能最优,相关性大小并不太依赖于漏缆间距.这些结果可对今后LTE-M系统部署提供参考.LTE-M system is intended to be used in the next generation of rail transit system,in which more than one leaky coaxial cables（LCX）are employed to establish the multiple-input multiple-output（MI-MO）system.Therefore,the system performance depended on the configuration should be studied.Based on the time domain channel measurement methodology and MIMO channel theory,we carried out channel measurements to investigate the MIMO performance using double LCXs in a typical tunnel scenario at the frequency of 1.8 GHz.We used different polarizations of LCX and different LCX spacings to analyze the MIMO channel correlation.We find that when the polarization of receiving antenna is vertical and polariza-tion of two LCX are horizontal,the best MIMO performance will be shown.Thus,the MIMO perform-ance is not strictly dependent on the LCX spacing.The results provide a reference for the deployment ofLTE-M in the future.

关 键 词：隧道 泄漏电缆 LTE—M MIMO 信道相关性 

分 类 号：TN92[电子电信—通信与信息系统]