Wireless Channel Measurements and Modeling of LTE Broadband System for High-Speed Railway Scenarios  

作　　者：ZHAO Hua LYU Qing LIU Yachuan CHEN Jiaxing ZHANG Shujing 

机构地区：[1]Hebei Normal University,Career Technical College

出　　处：《Chinese Journal of Electronics》2018年第5期1092-1097,共6页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61501168,No.61771181,No.61701165);Technology Foundation for Selected Overseas Chinese Scholar of Hebei Province(No.C2015005016);Hebei Province Education Office Foundation(No.QN2015030,No.QN2016100);Hebei Normal University Youth Foundation(No.L2015Q09,No.L2015Q12)

摘　　要：In high-speed scenarios, channel model is of vital importance in Long term evolution(LTE) systems.By extensive measurements on Beijing-Tianjin railway, this paper proposes a distance-dependent channel model. Both large-scale and small-scale channel characteristics are presented in detail. The large-scale path loss is modeled under the hierarchical network structure. Small-scale channel characteristics that include channel impulse response,power delay profile and Doppler spectrum are deduced and analyzed. In particular, a new stage-wise K-factor model is proposed. Combined with the cumulative distribution function of Root-mean squared(RMS) delay spread and the number of paths, they clearly illustrate the distancedependent variances of the channel. Finally, the integrated distance-dependent channel models are proposed to give a comprehensive description of broadband LTE channel in high-speed railway scenario.In high-speed scenarios, channel model is of vital importance in Long term evolution（LTE） systems.By extensive measurements on Beijing-Tianjin railway, this paper proposes a distance-dependent channel model. Both large-scale and small-scale channel characteristics are presented in detail. The large-scale path loss is modeled under the hierarchical network structure. Small-scale channel characteristics that include channel impulse response,power delay profile and Doppler spectrum are deduced and analyzed. In particular, a new stage-wise K-factor model is proposed. Combined with the cumulative distribution function of Root-mean squared（RMS） delay spread and the number of paths, they clearly illustrate the distancedependent variances of the channel. Finally, the integrated distance-dependent channel models are proposed to give a comprehensive description of broadband LTE channel in high-speed railway scenario.

关 键 词：Distance-dependent channel model High-speed railway LTE system K-FACTOR Delay spread 

分 类 号：TN929.5[电子电信—通信与信息系统]