Chen, Zhiyong and Ding, Zhiguo and Dai, Xuchu and Karagiannidis, George K. (2016) On the application of quasi-degradation to MISO-NOMA downlink. IEEE Transactions on Signal Processing, 64 (23). pp. 6174-6189. ISSN 1053-587X
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Abstract
In this paper, the design of non-orthogonal multiple access (NOMA) in a multiple-input-single-output (MISO) downlink scenario is investigated. The impact of the recently developed concept, quasi-degradation, on NOMA downlink transmission is first studied. Then, a Hybrid NOMA (H-NOMA) precoding algorithm, based on this concept, is proposed. By exploiting the properties of H-NOMA precoding, a low-complexity sequential user pairing algorithm is consequently developed, to further improve the overall system performance. Both analytical and numerical results are provided to demonstrate the performance of the H-NOMA precoding through the average power consumption and outage probability, while conventional schemes, as dirty-paper coding and zero-forcing beamforming, are used as benchmarking.