With the rapid development of high-mobility wireless communication systems, e.g., high-speed train (HST) and metro wireless communication systems, more and more attention has been paid to the wireless communication technology in tunnel-like scenarios. In this paper, we propose a three-dimensional (3D) nonstationary multiple-input multiple-output (MIMO) channel model with high-mobility wireless communication systems using leaky coaxial cable (LCX) inside a rectangular tunnel over the 1.8 GHz band. Taking into account single-bounce scattering under line-of-sight (LoS) and non-line-of-sight (NLoS) propagations condition, the analytical expressions of the channel impulse response (CIR) and temporal correlation function (T-CF) are derived. In the proposed channel model, it is assumed that a large number of scatterers are randomly distributed on the sidewall of the tunnel and the roof of the tunnel. We analyze the impact of various model parameters, including LCX spacing, time separation, movement velocity of Rx, and K-factor, on the T-CF of the MIMO channel model. For HST, the results of some further studies on the maximum speed of 360 km/h are given. By comparing the T-CF between the dipole MIMO system and the LCX-MIMO system, we can see that the performance of the LCX-MIMO system is better than that of the dipole MIMO system.

中文翻译：

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矩形隧道中带有泄漏同轴电缆的带有高移动性无线通信系统的三维MIMO信道模型

随着诸如高速列车（HST）和地铁无线通信系统的高移动性无线通信系统的迅速发展，在隧道状场景中，无线通信技术越来越受到关注。在本文中，我们提出了一个具有高移动性无线通信系统的三维（3D）非平稳多输入多输出（MIMO）信道模型，该系统使用在1.8 GHz频带内的矩形隧道内使用泄漏同轴电缆（LCX）进行移动。考虑到视线（LoS）和非视线（NLoS）传播条件下的单反射散射，信道脉冲响应（CIR）和时间相关函数（T-CF）的解析表达式派生。在建议的渠道模型中，假设大量的散射体随机分布在隧道的侧壁和隧道的顶部。我们分析了各种模型参数对MIMO信道模型的T-CF的影响，包括LCX间隔，时间间隔，Rx的移动速度和K因子。对于HST，给出了一些有关最大时速360 km / h的进一步研究结果。通过比较偶极子MIMO系统和LCX-MIMO系统之间的T-CF，我们可以看出LCX-MIMO系统的性能优于偶极子MIMO系统。给出了关于最大时速360 km / h的一些进一步研究的结果。通过比较偶极子MIMO系统和LCX-MIMO系统之间的T-CF，我们可以看出LCX-MIMO系统的性能优于偶极子MIMO系统。给出了关于最大时速360 km / h的一些进一步研究的结果。通过比较偶极MIMO系统和LCX-MIMO系统之间的T-CF，我们可以看到LCX-MIMO系统的性能优于偶极MIMO系统。