Performance of Relaying System with NOMA over Symmetric a-Stable Noise Channels

Huda Anwar; Ahmed A Alabdel Abass; Rawaa Kadhim

doi:10.17485/IJST/v17i17.432

Article

Performance of Relaying System with NOMA over Symmetric a-Stable Noise Channels

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v17i17.432

Year: 2024, Volume: 17, Issue: 17, Pages: 1745-1754

Original Article

Performance of Relaying System with NOMA over Symmetric a-Stable Noise Channels

Huda Anwar^1*, Ahmed A Alabdel Abass¹, Rawaa Kadhim¹

¹Department of Electrical and Electronic Engineering, University of Thi-Qar, Iraq

*Corresponding Author
Email: [email protected]

Received Date:16 February 2024, Accepted Date:01 April 2024, Published Date:19 April 2024

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objectives: This paper investigates the performance of a candidate 5G transmission system technique that is Non-Orthogonal Multiple Access (NOMA) over α-stable channels. This type of channel gets more attention in the research community because of its ability to model new IoT scenarios. However, there is a research gap in applying this type of channel to different wireless communications scenarios. In this work, we envision a scenario where users employ NOMA communications in the presence of an obstacle. As our mathematical analysis and simulation results show, there is a significant difference in performance when considering α-stable channels. Methods: To characterize the performance of the proposed noise channel, performance metrics such as outage probability and achievable rate are discussed. More particularly, we derive expressions for both outage probability and achievable rate for three NOMA users, considering the near user as a relay. In this paper, we consider additive symmetric α-stable noise channels with alpha α ∈ (1, 2). We present expressions for achievable rate and outage probability for each user (near, middle, and far) and investigate its behavior for different values of alpha (α). Findings: Based on the simulation results, it is shown that the high achievable rate observed for low alpha values while reduced as alpha is increased. Also, due to the influence of alpha, the outage probability is highly affected by α for small rate thresholds (Ro). In an envisioned scenario of three users with only one user forwarding the transmission to the other two, our results show that the near and middle users’ outage probability decreases as alpha α increases. Novelty: Despite this extensive study of the NOMA on individual channels, transmission under α-stable channel is not considered to the best of the authors’ knowledge.

Keywords: NOMA, relaying, Cooperative Non-Orthogonal Multiple Access, Symmetric α-Stable Noise Channels, Achievable rate

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Copyright

© 2024 Anwar et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)