Impact of Shadowing Correlation on Microdiversity and Marcodiversity of Cellular System in High-speed Railway Environments
Outage probabilities in shadow fading channels of high-speed railway (HSR) scenarios are evaluated when macro-diversity and micro-diversity techniques are considered. First, the power density function of signal-to-noise ratio (SNR) is derived in order to obtain a close form of outage probability for the narrow-strip-shaped cells in HSR. It is noteworthy that a Rice distribution is more realistic for modeling small-scale fading in HSR environments, a log-normal distribution is adopted to model the shadowing component. Then, the outage probabilities on the assumption of micro-diversity with maximal ratio combining and macro-diversity with selection combining are deduced, considering correlation property of shadow fading among base stations. It is calculated as a function of the shadowing cross-correlation coefficient, which is defined as correlations of links between one mobile station and two different base stations. Finally, the attenuation of signal amplitude caused by carriage passing loss in outage analysis for HSR is investigated.
Bei Zhang Zhangdui Zhong Bo Ai Ruisi He
State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, China
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
2159-2163
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）