高速列车车载多天线系统传输方案及容量分析

doi:10.3969/j.issn.1000-436x.2013.03.011

通信学报 ›› 2013, Vol. 34 ›› Issue (3): 90-98.doi: 10.3969/j.issn.1000-436x.2013.03.011

高速列车车载多天线系统传输方案及容量分析

罗万团^1,²,方旭明¹,程梦¹,周祥娟^1,³

¹ 西南交通大学信息编码与传输四川省重点实验室，四川成都610031
² 广西民族大学物理与电子工程学院，广西南宁530006
³ 南京中兴新软件有限责任公司，江苏南京 210012

出版日期:2013-03-25 发布日期:2017-07-20
基金资助:
国家重点基础研究发展计划（“973”计划）基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;铁道部科技研究开发计划重点课题基金资助项目

Transmission scheme and capacity analysis of onboard multi-antenna system in high-speed train

Wan-tuan LUO^1,²,Xu-ming FANG¹,Meng CHENG¹,Xiang-juan ZHOU^1,³

¹ Provincial Key Lab of Information Coding ＆ Transmissio thwest Jiaotong University, Chengdu 610031, China
² College of Physics and Electronic Engineering, Guangxi University for Nationalities, Nanning 530006,China
³ ZTE Corporation, Nanjing 210012, China

Online:2013-03-25 Published:2017-07-20
Supported by:
The National Basic Research and Development Program of China (973 Program);The Nation-al Natural Science Foundation of China;The Nation-al Natural Science Foundation of China;The Key Programs of Technological Research and Development of the Ministry of Railways

摘要/Abstract

摘要：

在对高铁视距SIMO (single-input multiple-output)下的直线多天线阵列接收进行三维建模的基础上，分析了车载N组阵列合并接收的信道容量，发现合并后的信道容量在基站附近会得到提升，但是存在抖动，而且很快衰减到香农容量，单纯地增加接收天线阵列组数N并不能获得平稳容量增益。研究还发现，调整阵列的参数并将阵列进行分组，适当改变每组阵列的权重值可获得稳定容量增益。计算机数值仿真结果也表明，适当的设置会使得列车在不同速度下克服驶过基站时的容量振荡，并获得平稳的信道容量。

关键词: 高速铁路, SIMO, 多天线阵列, 信道容量

Abstract:

Based on the three-dimensional modeling of line-of-sight SIMO (single-input multiple-output) channel for high-speed railway, which adopts uniform linear receiving array, the channel capacity of N -group receiving arrays was analyzed. The combining capacity grows but vibrates near base station and falls to Shannon capacity quickly. Instead of increasing group numbers of receiving arrays simply, stable capacity can be obtained by adjusting array parameters, grouping arrays and changing array weights among groups. The computer simulation results illustrate that proper setting would get stable channel capacity and avoid oscillation when the train is passing through the base stations.

Key words: high-speed railway, SIMO, multi-antenna array, channel capacity

罗万团,方旭明,程梦,周祥娟. 高速列车车载多天线系统传输方案及容量分析[J]. 通信学报, 2013, 34(3): 90-98.

Wan-tuan LUO,Xu-ming FANG,Meng CHENG,Xiang-juan ZHOU. Transmission scheme and capacity analysis of onboard multi-antenna system in high-speed train[J]. Journal on Communications, 2013, 34(3): 90-98.

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参数	取值
天线模式	全向天线
载波频率	2.0GHz
发射功率	46dBm
N₀	-174dBm/Hz
车载天线高度	5m
基站高度	35m
基站与铁轨间垂直距离	30m
小区半径	3km
基站间距离	4.8km
路径损耗模型	WINNER II D2a

高速列车车载多天线系统传输方案及容量分析

Transmission scheme and capacity analysis of onboard multi-antenna system in high-speed train

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