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A Non-orthogonal Multiple Access and Interference Mitigation Combined Strategy in Multi-user Networks

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Abstract

In contrast to the orthogonal multiple access (OMA), non-orthogonal multiple access (NOMA) was shown to have outstanding performance in terms of spectrum efficiency, user fairness and signalling cost. In order to further promote the QoS of NOMA, an interference alignment and NOMA (IA-NOMA) combined strategy was proposed and analysed in this paper. In the two-user model, the proposed IA-NOMA showed significant performance improvements in terms of bit error rate. By considering a more generalised scenario, the idea of IA-NOMA was extended from the two-user model to a massive-user network. In this context, a cluster based IA-NOMA (CIA-NOMA) algorithm was proposed, and the sum-rate and outage probability of the CIA-NOMA was derived. The QoS of CIA-NOMA in terms of outage probability and effective data rate were demonstrated under different target rates. For the results of outage probability, it was shown that the CIA-NOMA outperformed NOMA-only method, especially under a low target rate case. Correspondingly, in terms of effective capacity, the CIA-NOMA required less transmit power than the NOMA-only method to achieve a target data rate.

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Funding

This work was supported in part by the National Natural Science Foundation of China under Grant 61801412, and in part by the High-Level Personnel Foundation of Xiamen University of Technology under Grant (G2018005)YKJ18005R.

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Authors and Affiliations

  1. Fujian Key Laboratory of Communication Network and Information Processing, School of Opto-Electronic and Communication Engineering, Xiamen University of Technology, Xiamen, China

    Yue Tian

  2. CSN Research Group, University of Bristol, Bristol, England

    Yue Tian

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  1. Yue Tian
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Correspondence to Yue Tian.

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Tian, Y. A Non-orthogonal Multiple Access and Interference Mitigation Combined Strategy in Multi-user Networks. Wireless Pers Commun 104, 111–128 (2019). https://doi.org/10.1007/s11277-018-6011-z

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  • DOI: https://doi.org/10.1007/s11277-018-6011-z

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