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http://dx.doi.org/10.6109/jkiice.2022.26.7.1040

Resource Allocation Scheme Using Small Feedback Overhead in Downlink Non-Orthogonal Multiple Access Systems  

Lee, In-Ho (School of Electronic and Electrical Engineering, Hankyong National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.26, no.7, 2022 , pp. 1040-1046 More about this Journal
Abstract
In this paper, we consider a system with massive user equipments (UEs) in a cell and assume path loss and Rayleigh fading channels between the base station (BS) and UEs. In addition, it is assumed that the system bandwidth consists of multiple identical frequency subchannels. Under such assumptions, we propose a channel state information (CSI) feedback scheme and a resource allocation scheme for non-orthogonal multiple access (NOMA) transmission in order to reduce the feedback overhead of CSI generated by massive UEs and to reduce the complexity of resource allocation. In particular, for the proposed schemes, we analyze the sum data rate achievable by massive UEs in a cell and the outage probability with which the UEs in a cell do not meet the target data rate. Through the simulation results, we show that the proposed schemes can provide the superior outage probability, although it degrades the average sum data rate.
Keywords
Feedback overhead; Non-orthogonal multiple access; Outage probability; Resource allocation; Sum data rate;
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