衰落环境下高速铁路基站配置标准研究  

RESEARCH ON ARRANGEMENT CRITERION OF HIGH-SPEED RAILWAY BASE STATION IN FADING CHANNELS

作　　者：李颖[1,2] 张闯[2] 

机构地区：[1]兰州工业学院电子信息工程学院,甘肃兰州730050 [2]清华大学电子工程系,北京100084

出　　处：《计算机应用与软件》2016年第11期71-73,78,共4页Computer Applications and Software

基　　金：国家自然科学基金项目(61171064);国家重点基础研究发展计划项目(2012CB316100(2));国家科技重大项目(2010ZX03003-003)

摘　　要：针对大尺度衰落和小尺度衰落共同作用的信道,从信息流的角度,研究离散时间加性高斯白噪声干扰场景下的信道容量与总服务量之间的关系。从理论上推导出高速铁路基站的服务量比率与基站间距的关系,为高速铁路基站的合理配置提供行之有效的方法和依据。最后,在给定服务量比率的条件下,将大尺度衰落信道基站的配置间距和增加了小尺度衰落的基站配置间距进行仿真实验对比分析。结果显示:服务量比率η<0.9时,小尺度衰落相对于大尺度衰落对系统设计的影响可以近似忽略;0.9<η<1时,小尺度衰落对系统设计产生较大的影响。In light of the channel with joint action of large-scale fading and small-scale fading,from the perspective of information flow,we investigated the relationship between channel capacity and total service volume in discrete time additive white Gaussian noise interference scenario. The relationship between base station interval and base station service volume ratio of high-speed railway was theoretically deduced,which provides effective approach and basis in regard to reasonable arrangement of base station along the high-speed railway. Finally,under the condition of given service volume ratio,we carried out simulation experiment on the arrangement interval of base stations in both large-scale fading channels and small-scale fading channels,and made comparison and analysis on it. Results showed that when the service volume ratio η < 0. 9,the impact of small-scale fading on system design can be approximately ignored relative to large-scale fading; while 0. 9 < η < 1,the small-scale fading will have greater effect on system design.

关 键 词：高速铁路 衰落 标准 服务量比率 基站间距 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]