Non-stationary channel characterization for high-speed railway under viaduct scenarios  

作　　者：Liu Liu Cheng Tao Rongchen Sun Houjin Chen Zihuai Lin 

机构地区：[1]Institute of Broadband Wireless Mobile Communications,Beijing Jiaotong University [2]National Mobile Communications Research Laboratory,Southeast University [3]School of Electrical and Information Engineering,University of Sydney

出　　处：《Chinese Science Bulletin》2014年第35期4988-4998,共11页

基　　金：supported in part by the National Natural Foundation of Chinese Project(61032002,61371070);Open Research Fund of National Mobile Communications Research Laboratory,Southeast University(2012D07)

摘　　要：Non-stationary properties based on Markov chains are provided to characterize the wireless propagation mechanism of high-speed railway(HSR) under viaduct scenarios.This Markov modeling method reveals the temporal statistical behaviors of the persistence process corresponding to resolvable multipath components.Using the channel measurement data on Beijing–Tianjin HSR at 2.35 GHz,the steady-state probability matrices and the transition probability matrices of Markov chains are specified.The non-stationary channel parameters are informative for the link-level simulation and can be used for prototype verification for non-stationary HSR channels.In addition,we propose and investigate the concepts of the medium-scale fading entropy and lifetime,which quantitatively describe the degrees of uncertainty and stability,respectively.Furthermore,our provided models are compared with the experimental results by means of the Kullback–Leibler(KL) distance.It shows that the simulated results match the measured data very well.Non-stationary properties based on Markov chains are provided to characterize the wireless propagation mechanism of high-speed railway （HSR） under viaduct sce- narios. This Markov modeling method reveals the temporal statistical behaviors of the persistence process corresponding to resolvable multipath components. Using the channel mea- surement data on Beijing-Tianjin HSR at 2.35 GHz, the steady-state probability matrices and the transition probability matrices of Markov chains are specified. The non-stationary channel parameters are informative for the link-level simu- lation and can be used for prototype verification for non-sta- tionary HSR channels. In addition, we propose and investigate the concepts of the medium-scale fading entropy and lifetime, which quantitatively describe the degrees of uncertainty and stability, respectively. Furthermore, our provided models are compared with the experimental results by means of the Ku- llback-Leibler （KL） distance. It shows that the simulated results match the measured data very well.

关 键 词：通道特性 高速铁路 高架桥 马尔可夫链 转移概率矩阵 非平稳性 传播机制 多径分量 

分 类 号：U285[交通运输工程—交通信息工程及控制]