Performance analysis of NOMA enabled multi-user co-operative IoT network with SWIPT protocol

Naeem Uz Zaman, Ahmad Kamal Hassan, Ziaul Haq Abbas, Ghulam Abbas, Muhammad Bilal, Sangheon Pack

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This study investigates the performance of user equipments (UEs) and IoT devices in a multi-user (MU) multiple-input single-output (MISO) configuration based non-orthogonal multiple-access (NOMA) system. The proposed model includes a base station surrounded by many users and a number of dispersed IoT devices. In the considered MU IoT network scenario, power allocation coefficients are set to ensure that both the relaying UE and the targeted IoT device experience increased performance. To assist the intended IoT device with weak channel conditions, an optimal user selection method is developed that picks a UE with comparatively better reception, and thereby the selected UE acts as relay forward node utilizing the simultaneous wireless information and power transfer protocol. The characterization of a key performance metric, i.e., the outage probability is derived by adopting a two-step procedure. First, quadratic forms of signal to interference plus noise ratio (SINR) at the relaying UE and the signal-to-noise ratio (SNR) and SINR at the intended IoT device are constructed. Then, using the indefinite quadratic form approach, we arrive at closed-form expressions for the outage probability (OP) of intended IoT device under linearly dependent beamformers. To validate the analytical expressions provided in this study, simulations are performed. We demonstrate that by utilizing the proposed user selection technique in MU-MISO-NOMA system decreases the OP of the intended IoT device by 40% on average. Furthermore, utilizing multiple transmit antenna elements decreases the OP of the intended IoT device by approximately 10%.

Original languageEnglish
Article number101639
JournalJournal of King Saud University - Computer and Information Sciences
Issue number8
Publication statusPublished - 2023 Sept

Bibliographical note

Funding Information:
This research was supported by the MSIT (Ministry of Science and ICT), Korea, under the ITRC (Information Technology Research Center) support program (IITP-2023-RS-2022-00156353 and IITP-2023-2021-0-01810) supervised by the IITP (Institute for Information & Communications Technology Planning & Evaluation).

Publisher Copyright:
© 2023 The Author(s)


  • Beamformers
  • Energy harvesting
  • User selection

ASJC Scopus subject areas

  • General Computer Science


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