| 泄漏电缆的孔径效应在地铁隧道中MIMO 特性的研究 |
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| 引用本文： | 刘,玺.泄漏电缆的孔径效应在地铁隧道中MIMO 特性的研究[J].都市快轨交通,2021,34(5):138-144. |
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| 作者姓名： | 刘 玺 |
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| 作者单位： | 中铁上海设计院集团有限公司,上海200070 |
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| 摘 要： | 在隧道场景中使用双泄漏同轴电缆(leaky coaxial cable,LCX)和单个LCX,研究孔径效应对多输入多输出(multiple-input multiple-output,MIMO)性能的影响。先从理论上研究LCX槽口中的孔径效应,然后在矩形隧道和拱形隧道中使用1.8GHz的LCX进行2×2MIMO测量。测量结果表明:在隧道场景中,由双LCX和单LCX部署的孔径效应的概率非常有限。最后提供双LCX和单LCX情况下的信道容量结果,可为在隧道中采用MIMO技术提供前瞻性指导。
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| 关 键 词： | 轨道交通 信道容量 信道特性 孔径效应 漏泄同轴电缆 多输入多输出 |
MIMO Characteristics of Keyhole Effect in Subway Tunnel |
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| LIU Xi.MIMO Characteristics of Keyhole Effect in Subway Tunnel[J].Urban Rapid Rail Transit,2021,34(5):138-144. |
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| Authors: | LIU Xi |
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| Institution: | China Railway Shanghai Design Institute Group Co., LTD. |
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| Abstract: | This study investigates the influence of the keyhole effect on multiple-input multiple-output (MIMO) performance
by using double leaky coaxial cables (LCXs) and a single LCX in a tunnel scenario. The keyhole effect in the slots of the LCX
was theoretically studied. Then, a 2×2 MIMO measurement campaign using LCXs at 1.8 GHz in a rectangular tunnel and an
arched tunnel was conducted. The results reveal that the keyhole effect does not exist in the double LCXs case, and the
keyhole probability in the single LCX case is also limited. The results of channel capacity in the double LCXs case and single
LCX case can provide prospective guidance for employing MIMO technology in tunnels. |
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| Keywords: | rail transit channel capacity channel characterization keyhole effect leaky coaxial cable (LCX) multiple-input multiple- output (MIMO) |
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