Relative Sum-Rate Gains of PD-NOMA over OMA under Max-Min, Round-Robin, and Proportional Fairness

Relative Sum-Rate Gains of PD-NOMA over OMA under Max-Min, Round-Robin, and Proportional Fairness | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Relative Sum-Rate Gains of PD-NOMA over OMA under Max-Min, Round-Robin, and Proportional Fairness Yakov Kryukov, Dmitriy Pokamestov, Artem Shinkevich, Georgy SHALIN, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7288169/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract This letter presents a comparative analysis of power-domain non-orthogonal multiple access (PD-NOMA) and orthogonal multiple access (OMA) under Max-Min Fairness (MMF), Round Robin (RR), and Proportional Fair (PF) scheduling strategies, with a focus on preserving fairness across both systems. Motivated by the lack of consistent evaluation frameworks for multiuser scenarios, we develop a unified method that ensures identical user rate distributions and resource constraints. To demonstrate fairness preservation, we provide an illustrative example confirming that PD-NOMA maintains the same rate allocation profile as OMA under equivalent scheduling. A stochastic model for single-carrier downlink transmission over Rayleigh fading channels is used to simulate systems with up to 20 users. The results show that PD-NOMA consistently outperforms OMA in terms of sum-rate across all strategies, with the gain increasing with user count and median SNR, while approaching an asymptotic bound. Beyond three users, the gain per additional user becomes negligible, indicating that multiplexing two or three users is optimal for practical throughput enhancement. PD-NOMA OMA sum-rate gain MMF PF RR Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7288169","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":515486610,"identity":"6bd0efa0-a341-46fc-b37a-4bd093b80b24","order_by":0,"name":"Yakov 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