2019/08/15 by Onel L. Alcaraz López, López, Onel L. A., Hirley Alves +3
Engineering · #Advanced MIMO Systems Optimization #Advanced Wireless Communication Technologies #FOS: Computer and information sciences #FOS: Electrical engineering #Information Theory (cs.IT) #Networking and Internet Architecture (cs.NI) #Satellite Communication Systems #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.1908.05513
openalex publication_date 2019/08/15 · openalex created_date 2022/07/13 · openalex updated_date 2026/07/28
Non-orthogonal multiple access (NOMA) has been identified as a promising\ntechnology for future wireless systems due to its performance gains in spectral\nefficiency when compared to conventional orthogonal schemes (OMA). This gain\ncan be easily translated to an increasing number of served users, but imposes a\nchallenge in the system reliability which is of vital importance for new\nservices and applications of coming cellular systems. To cope with these issues\nwe propose a NOMA rate control strategy that makes use only of topological\ncharacteristics of the scenario and the reliability constraint. We attain the\nnecessary conditions so that NOMA overcomes the OMA alternative, while we\ndiscuss the optimum allocation strategies for the 2-user NOMA setup when\noperating with equal rate or maximum sum-rate goals. In such scenario we show\nthat the user with the largest target error probability times the ratio between\nthe average receive signal power and the average interference power, should be\nscheduled to be decoded first for optimum performance. We compare numerically\nthe performance of our allocation scheme with its ideal counterpart requiring\nfull CSI at the BSs and infinitely long blocklength, and show how the gap\nincreases as the reliability constraint becomes more stringent. Results also\nevidence the benefits of NOMA when the co-interference can be efficiently\ncanceled, specially when the goal is to maximize the sum-rate.\n