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Optimality of NOMA Using Fair Power Allocation Policy for Wireless Communication Systems

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Abstract

The rising need for mobile internet services and the proliferation of the Internet of Things present complex demands for 5G wireless communications. These demands include the requirements for increased spectral efficiency and widespread connectivity. This work has addressed the non-orthogonal multiple access (NOMA) technology for achieving high spectral efficiency. NOMA enables numerous users to use the same time-frequency resources which increases spectral efficiency. Considering a multi-user downlink NOMA systems, We have developed an optimal power allocation strategy for users participating in NOMA in a cell. The proposed optimal power allocation scheme is developed to maximize the NOMA system’s sum rate. Conducting various simulations and considering four users in a cell, we have proved that the proposed method outperforms various existing schemes like, orthogonal multiple access (OMA), fixed-NOMA (F-NOMA), and other power allocation schemes. It is observed that at a SNR level of 15 dB, the proposed method achieved a sum rate of 9.027 bits per channel use (BPCU), whereas F-NOMA gives 5.2398 BPCU, OMA gives 4.5509 BPCU, and power allocation policy (PA-1) achieved 6.7779 BPCU.

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Funding

This work is funded by Ministry of Electronics and Information Technology (MeitY), Government of India, Project Number-0429.

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  1. Department of Electrical Engineering, Indian Institute of Technology, Patna, India

    Adarsh Ravi & Preetam Kumar

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  1. Adarsh Ravi
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  2. Preetam Kumar
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Correspondence to Adarsh Ravi.

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Ravi, A., Kumar, P. Optimality of NOMA Using Fair Power Allocation Policy for Wireless Communication Systems. Wireless Pers Commun (2024). https://doi.org/10.1007/s11277-024-10871-4

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