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Time Domain and Frequency Domain Deterministic Channel Modeling for Tunnel/Mining Environments

机译：隧道/采矿环境的时域和频域确定性信道建模

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摘要

Understanding wireless channels in complex mining environments is critical for designing optimized wireless systems operated in these environments. In this paper, we propose two physics-based, deterministic ultra-wideband (UWB) channel models for characterizing wireless channels in mining/tunnel environments — one in the time domain and the other in the frequency domain. For the time domain model, a general Channel Impulse Response (CIR) is derived and the result is expressed in the classic UWB tapped delay line model. The derived time domain channel model takes into account major propagation controlling factors including tunnel or entry dimensions, frequency, polarization, electrical properties of the four tunnel walls, and transmitter and receiver locations. For the frequency domain model, a complex channel transfer function is derived analytically. Based on the proposed physics-based deterministic channel models, channel parameters such as delay spread, multipath component number, and angular spread are analyzed. It is found that, despite the presence of heavy multipath, both channel delay spread and angular spread for tunnel environments are relatively smaller compared to that of typical indoor environments. The results and findings in this paper have application in the design and deployment of wireless systems in underground mining environments.
机译：了解复杂采矿环境中的无线信道对于设计在这些环境中运行的优化无线系统至关重要。在本文中，我们提出了两个基于物理的确定性超宽带（UWB）信道模型，用于表征采矿/隧道环境中的无线信道-一个在时域，另一个在频域。对于时域模型，导出了一般的信道脉冲响应（CIR），其结果以经典的UWB分接式延迟线模型表示。导出的时域信道模型考虑了主要的传播控制因素，包括隧道或入口的尺寸，频率，极化，四个隧道壁的电特性以及发射器和接收器的位置。对于频域模型，可以通过分析得出复杂的信道传递函数。基于所提出的基于物理的确定性信道模型，分析了诸如延迟扩展，多径分量数和角度扩展之类的信道参数。已经发现，尽管存在大量的多径，但是与典型的室内环境相比，隧道环境的信道延迟扩展和角度扩展都相对较小。本文的结果和发现可用于地下采矿环境中无线系统的设计和部署。

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