English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, the performance of a dual-hop relaying terahertz (THz)wireless communication system is investigated. In particular, the behaviors ofthe two THz hops are determined by three factors, which are the deterministicpath loss, the fading effects, and pointing errors. Assuming that both THzlinks are subject to the $\alpha$-$\mu$ fading with pointing errors, we deriveexact expressions for the cumulative distribution function (CDF) andprobability density function (PDF) of the end-to-end signal-to-noise ratio(SNR). Relying on the CDF and PDF, important performance metrics are evaluated,such as the outage probability, average bit error rate, and average channelcapacity. Moreover, the asymptotic analyses are presented to obtain moreinsights. Results show that the dual-hop relaying scheme has better performancethan the single THz link. The system's diversity order is$\min\left\{\frac{\phi_1}{2},\frac{\alpha_1\mu_1}{2},\phi_2,\alpha_2\mu_2\right\}$,where $\alpha_i$ and $\mu_i$ represent the fading parameters of the $i$-th THzlink for $i\in(1,2)$, and $\phi_i$ denotes the pointing error parameter. Inaddition, we extend the analysis to a multi-relay cooperative system and derivethe asymptotic symbol error rate expressions. Results demonstrate that thediversity order of the multi-relay system is$K\min\left\{\frac{\phi_1}{2},\frac{\alpha_1\mu_1}{2},\phi_2,\alpha_2\mu_2\right\}$,where $K$ is the number of relays. Finally, the derived analytical expressionsare verified by Monte Carlo simulation.

Performance Analysis of Dual-Hop THz Transmission Systems over $\alpha$-$\mu$ Fading Channels with Pointing Errors