基于传播图论的6 GHz隧道信道建模

doi:10.12305/j.issn.1001-506X.2025.01.32

Abstract

Abstract:

With the increasing demand for underground rail transit communication services, existing rail transit communication system and antenna equipment are under tremendous pressure. To coordinate with the deployment of large-scale antennas and the setup of multiple input multiple output (MIMO) communication system in the tunnel scenario, using propagation graph theory to simulate multipath propagation is proposed. The channel impulse response (CIR) of the long and narrow tunnels is generated by the propagation graph theory based on Lambertian scattering model. The power delay profile, root mean square delay, and power azimuth spectrum are obtained from the channel impulse response at different receiver positions in the tunnel. In order to verify the accuracy and applicability of propagation graph theory in the field of MIMO tunnel channel modeling, simulation datas are compared with measured datas. The results show that the proposed method can effectively model the MIMO tunnel channel at 6 GHz.

Key words: tunnel channel modeling, multiple input multiple output (MIMO), propagation graph theory, channel impulse response (CIR), Lambertian scattering model

CLC Number:

U285.2

Jun CHI, Rongchen SUN, Zhiguo SUN, Zhenyu YI. Tunnel channel modeling based on propagation graph theory at 6 GHz[J]. Systems Engineering and Electronics, 2025, 47(1): 316-323.

Figures/Tables 9

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Table 1

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References 34

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设备	参数
发射机	SMBV100A
接收机	FSW8
同步	同源铷钟
天线	垂直极化全向双锥天线
测量信号	Zadoff-Chu序列

参数	取值
带宽/MHZ	91
载频/GHz	6
接收天线位置/m	15, 25, 75, 85
接收天线高度/m	2.2
发送天线高度/m	2.4
天线模式	16×16
最大反射次数	2
矩形隧道尺寸	内壁宽4 m, 长50 m, 顶高4.5 m
圆形隧道尺寸	内壁宽4 m, 长50 m, 顶高3 m

位置/m	实测数据/(°)	仿真结果/(°)
15	18.53	10.12
25	15.85	16.57
75	11.58	6.29
85	13.26	5.23

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Tunnel channel modeling based on propagation graph theory at 6 GHz

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