Performance analysis of RIS-assisted full-duplex communications with infinite and finite blocklength codes

Singh, K, Karim, F, Singh, SK, Sharma, PK, Mumtaz, S ORCID: https://orcid.org/0000-0001-6364-6149 and Flanagan, MF, 2023. Performance analysis of RIS-assisted full-duplex communications with infinite and finite blocklength codes. IEEE Transactions on Communications. ISSN 0090-6778

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Abstract

With the advancement of wireless communication technologies, reconfigurable intelligent surfaces (RISs) have recently paved the way to augmenting the performance of wireless networks with the aid of multiple reflecting surfaces by efficiently attuning the signal reflection through a large number of low-cost passive elements. In this paper, we consider an RIS-aided full-duplex (FD) communication network consisting of a FD access point (AP) that communicates with an uplink and a downlink user simultaneously with the aid of an RIS as well as through the direct link between the AP and users. To evaluate the system performance under infinite blocklength (IBL) and finite blocklength (FBL) codes, we derive the analytical expressions for the outage probability and throughput in case of IBL, and for block-error rate (BLER) and goodput in the case of FBL, for both uplink and downlink transmission. Furthermore, the expressions for the maximum achievable rate under FBL and IBL transmission are derived. Next, we also extend the analysis of the single-user framework to a more practical scenario with multiple users utilizing non-orthogonal multiple access (NOMA) and derive analytical expressions for the outage probability and BLER at each downlink user and at the AP. The accuracy of the derived expressions is validated via simulation results, and insights are provided regarding the impact of the number of reflecting elements and imperfect channel state information (CSI) on the performance of the considered system. Finally, from the comparative analysis, it is shown that the RIS-aided system outperforms the system without RIS in both IBL and FBL scenarios, providing remarkable improvement in the outage probability and BLER.

Item Type:	Journal article
Publication Title:	IEEE Transactions on Communications
Creators:	Singh, K., Karim, F., Singh, S.K., Sharma, P.K., Mumtaz, S. and Flanagan, M.F.
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
Date:	17 April 2023
ISSN:	0090-6778
Identifiers:	Number Type 10.1109/tcomm.2023.3267555 DOI 1752067 Other
Rights:	© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Divisions:	Schools > School of Science and Technology
Record created by:	Laura Ward
Date Added:	20 Apr 2023 15:29
Last Modified:	20 Apr 2023 15:29
URI:	https://irep.ntu.ac.uk/id/eprint/48785

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