THz transmissions suffer from pointing errors due to antenna misalignment and incur higher path loss from the molecular absorption in addition to the channel fading. In this paper, we employ an amplify-and-forward (AF) dual-hop relaying to mitigate the effect of pointing errors and extend the range of the THz wireless system for backhaul connectivity. We provide statistical analysis on the performance of the considered system by deriving analytical expressions for the outage probability, average bit-error-rate (BER), average signal-to-noise ratio (SNR), and a lower bound on the ergodic capacity over independent and identical (i.i.d) $\alpha$-$\mu$ fading combined with the statistical effect of pointing errors. Using computer simulations, we validate the derived analysis of the relay-assisted system. We also demonstrate the effect of the system parameters on outage probability and average BER with the help of diversity order. We show that data rates up to several \mbox{Gbps} can be achieved using THz transmissions, which is desirable for next-generation wireless systems, especially for backhaul applications.

翻译：THz 传输会因天线不匹配而出现点错误,并且除了频道消退外,分子吸收也造成更高的路径损失。在本文中,我们使用“放大和前向”双向转发(AF),以减轻点出错的影响,扩大THz无线系统对回水道连接的范围。我们通过对断流概率、平均比特拉速率(BER)、平均信号到噪音比率(SNR)的分析表达法,对考虑过的系统的性能进行统计分析。我们显示,可以使用对下一代无线系统特别是后方应用来说可取的THz传输率达到数个\mbox{Gbps}的数据率,从而实现数据超速率和平均BER。