论文标题
HARQ ADED TERAHERTZ通讯的中断概率分析
Outage Probability Analysis of HARQ-Aided Terahertz Communications
论文作者
论文摘要
尽管Terahertz（THZ）通信可以提供移动宽带服务，但它通常具有巨大的路径损失，并且容易受到天线错位的影响。这大大降低了接收可靠性。为了解决此问题，提出了混合自动重复请求（HARQ），以进一步提高THZ通信的可靠性。本文对两种不同类型的HARQ AID THZ通信的中断性能进行了深入的调查，包括I型HARQ和HARQ与Chase Combining（HARQ-CC）。此外，本文考虑了褪色和随机天线未对准的影响。 HARQAID THZ通信的确切中断概率以封闭形式得出，渐近中断分析可探索有用的见解。特别是，可以通过使用HARQ辅助方案来实现全职多样性。此外，由于HARQ-CC AID计划的性能高于I型HARQ AID，因为其多样性相结合。最终通过蒙特卡洛模拟验证了分析结果。
Although terahertz (THz) communications can provide mobile broadband services, it usually has a large path loss and is vulnerable to antenna misalignment. This significantly degrades the reception reliability. To address this issue, the hybrid automatic repeat request (HARQ) is proposed to further enhance the reliability of THz communications. This paper provides an in-depth investigation on the outage performance of two different types of HARQ-aided THz communications, including Type-I HARQ and HARQ with chase combining (HARQ-CC). Moreover, the effects of both fading and stochastic antenna misalignment are considered in this paper. The exact outage probabilities of HARQ-aided THz communications are derived in closed-form, with which the asymptotic outage analysis is enabled to explore helpful insights. In particular, it is revealed that full time diversity can be achieved by using HARQ assisted schemes. Besides, the HARQ-CC-aided scheme performs better than the Type-I HARQ-aided one due to its high diversity combining gain. The analytical results are eventually validated via Monte-Carlo simulations.
