隧道环境下1.8 GHz无线信道测量与分析

doi:10.12066/j.issn.1007-2861.1885

上海大学学报(自然科学版) ›› 2019, Vol. 25 ›› Issue (1): 24-34.doi: 10.12066/j.issn.1007-2861.1885

隧道环境下1.8 GHz无线信道测量与分析

裴欣栋, 尹晓宇, 武艺鸣, 郑国莘()

上海大学特种光纤与光接入网省部共建重点实验室,上海 200444

收稿日期:2017-02-20 出版日期:2019-02-28 发布日期:2019-02-26
通讯作者: 郑国莘 E-mail:gxzheng@staff.shu.edu.cn
基金资助:
国家自然科学基金面上资助项目(61571282)

Wireless channel measurements and analysis at 1.8 GHz in a tunnel environment

PEI Xindong, YIN Xiaoyu, WU Yiming, ZHENG Guoxin()

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

Received:2017-02-20 Online:2019-02-28 Published:2019-02-26
Contact: ZHENG Guoxin E-mail:gxzheng@staff.shu.edu.cn

摘要/Abstract

摘要：

基于多输入多输出(multiple input multiple output, MIMO)技术的地铁长期演进系统(long term evolution-metro, LTE-M)将在下一代城市轨道交通列车控制系统中得以应用. 由于LTE-M工作于1.8 GHz频段, 因此研究在隧道环境下1.8 GHz频段的传播特性非常重要. 利用宽带扩频序列以及虚拟MIMO方法, 测量并分析了隧道内1.8 GHz频段自由天线的路径损耗、均方根(root mean square, RMS)时延、MIMO容量等传播特性. 结果表明: 在隧道环境下1.8 GHz频段的路径损耗因子低于自由空间内的路径损耗因子; 隧道横截面积的变化会影响电磁波的传播特性; MIMO天线阵规模越大, 容量越大; 天线间距的变化会引起MIMO容量的变化.

关键词: LTE-M, MIMO, 1.8 GHz, 信道测量, 传播特性

Abstract:

The long term evolution-metro (LTE-M) method based on multiple input multiple output (MIMO) technology will be used in the next generation urban rail transit train control systems. As LTE-M works in the 1.8 GHz band, it is important to study wave propagation characteristics in a tunnel environment at 1.8 GHz. Using a wideband spread spectrum sequence and the virtual MIMO method, the key radio channel characteristics of a tunnel at 1.8 GHz are investigated, including path loss, root mean square (RMS) delay spread, and MIMO channel capacity. The results show that the path loss factor in a tunnel environment at 1.8 GHz is lower than that in a free space, and changes in the tunnel cross-sectional area can affect electromagnetic wave propagation. Besides, the larger the number of MIMO antenna array elements, the greater the capacity. Changing the antenna spacing can change MIMO capacity.

Key words: long term evolution-metro (LTE-M), multiple input multiple output (MIMO), 1.8 GHz, channel measurement, propagation characteristic

中图分类号:

TN929.5

裴欣栋, 尹晓宇, 武艺鸣, 郑国莘. 隧道环境下1.8 GHz无线信道测量与分析[J]. 上海大学学报(自然科学版), 2019, 25(1): 24-34.

PEI Xindong, YIN Xiaoyu, WU Yiming, ZHENG Guoxin. Wireless channel measurements and analysis at 1.8 GHz in a tunnel environment[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(1): 24-34.

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隧道环境下1.8 GHz无线信道测量与分析

Wireless channel measurements and analysis at 1.8 GHz in a tunnel environment

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