On Outage Performance of Terahertz Wireless Communication Systems

• Published in: IEEE transactions on communications Vol. 70; no. 1; pp. 649 - 663
• Main Authors: Ye, Jia, Dang, Shuping, Ma, Guoqing, Amin, Osama, Shihada, Basem, Alouini, Mohamed-Slim
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.01.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Absorption; Channel estimation; Channel models; channel parameter estimation; Compound channels; compound/composite channel model; Compounds; Direct selling; gaseous molecular absorption; Maximum likelihood estimation; Molecular absorption; Outage performance analysis; Outages; Parameter estimation; Propagation losses; Ray tracing; Stochastic processes; terahertz communications; Wireless communication; Wireless communication systems
• ISSN: 0090-6778; 1558-0857
• DOI: 10.1109/TCOMM.2021.3123364

To expedite research progress on terahertz (THz) communications, we analyze the outage performance of THz communication systems by a compound channel model in this paper. Different from existing models, the compound channel model incorporates the effects of spreading loss, molecular absorption loss, shadowing, and multi-path fading via a composite distribution. By using this model, we maintain an equilibrium of the outage performance analysis between mathematical tractability and the fidelity of realistic THz channels. Specifically, by utilizing the compound channel model, outage performance analysis can get rid of sophisticated case-specific channel modeling relying on field measurement and the ray-tracing assessment. To facilitate the application of the proposed channel model, we also design a maximum likelihood estimation (MLE) based channel parameter estimation approach for the compound channel model. The analytical results of outage performance by using the compound channel model are given in closed form and verified by numerical results.