Niu Mingbo, Ji Ruihang, Wang Hucheng, Liu Huan
Internet of Vehicle2 to Road Research Laboratory, School of Energy and Electrical Engineering, Chang'an University, 356 Changda Nan Lu, Xi'an 710018, China.
Entropy (Basel). 2024 Aug 20;26(8):706. doi: 10.3390/e26080706.
One of the key advantages of terahertz (THz) communication is its potential for energy efficiency, making it an attractive option for green communication systems. Coherent THz transmission technology has recently been explored in the literature. However, there exist few error performance results for such a wireless link employing coherent THz technology. In this paper, we explore a comprehensive terrestrial channel model designed for wireless line-of-sight communication using THz frequencies. The performance of coherent THz links is analyzed, and it is found to be notably affected by two significant factors, atmospheric turbulence and pointing errors. These could occur between the terahertz transmitter and receiver in terrestrial links. The exact and asymptotic solutions are derived for bit error rate and interrupt probability for binary phase-shift keying coherent THz systems, respectively, over log-normal and Gamma-Gamma turbulent channels. The asymptotic outage probability analysis is also performed. It is shown that the presented results offer a precise estimation of coherent THz transmission performance and its link budget.
太赫兹（THz）通信的关键优势之一在于其潜在的能源效率，这使其成为绿色通信系统的一个有吸引力的选择。相干太赫兹传输技术最近已在文献中得到探讨。然而，对于采用相干太赫兹技术的这种无线链路，几乎没有误差性能结果。在本文中，我们探索了一种为使用太赫兹频率的无线视距通信设计的综合地面信道模型。分析了相干太赫兹链路的性能，发现它受到两个重要因素的显著影响，即大气湍流和指向误差。这些情况可能发生在地面链路中的太赫兹发射器和接收器之间。分别针对对数正态和伽马 - 伽马湍流信道，推导了二进制相移键控相干太赫兹系统误码率和中断概率的精确解和渐近解。还进行了渐近中断概率分析。结果表明，所呈现的结果提供了对相干太赫兹传输性能及其链路预算的精确估计。
