Advances in MISO-NOMA for Cell-Edge User Performance: A Comprehensive Review (Published)
This review examines how multiple-input single-output non-orthogonal multiple access addresses the performance challenges faced by cell-edge users in future wireless networks. As the industry moves toward 6G, the demand for spectral efficiency highlights the limitations of traditional orthogonal methods, particularly for users suffering from severe path loss and interference. NOMA improves user fairness by enabling power-domain multiplexing, which can increase supported user density and provide throughput gains for edge users. The study synthesises various technical strategies, including advanced beamforming, adaptive power allocation, and cooperative relaying integrated with wireless power transfer. These models use near users as relays to enhance the connectivity of distant users and significantly reduce outage probability. Finally, the analysis considers practical impairments and multi-cell interference management, identifying future research directions in artificial intelligence and mobility to ensure equitable service throughout the entire network coverage area.
Keywords: Beamforming, Cell-Edge Users, MISO-NOMA, Spectral Efficiency and Wireless Communication Networks