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

Abstract

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

CLC Number:

TN929.5

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.

Figures/Tables 12

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References 11

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

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