• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Performance Analysis of Two-Way Relay NOMA Systems with Hardware Impair-ments and Channel Estimation Errors


Abstract

In this paper, we consider a two-way relay non-orthogonal multiple access (TWR-NOMA) system with residual hardware impairments (RHIs) and channel estimation errors (CEEs), where two group users exchange their information via the decode-and-forward (DF) relay by using NOMA protocol. To evaluate the performance of the considered system, exact analytical expressions for the outage probability of the two groups users are derived in closed-form. Moreover, the asymptotic outage behavior in the high signal-to-noise ratio (SNR) regime is examined and the diversity order is derived and discussed. Numerical simulation results verify the accuracy of theoretical analyses, and show that: i) RHIs and CEEs have a deleterious effects on the outage probabilities; ii) CEEs have significant effects on the performance of the near user; iii) Due to the RHIs, CEEs, inter-group interference and intra-group interference, there exists error floors for the outage probability.


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Cite this article

[IEEE Style]
X. Tian, Q. Li, X. Li, H. Zhang, K. Rabie and C. C. Cavalcante, "Performance Analysis of Two-Way Relay NOMA Systems with Hardware Impair-ments and Channel Estimation Errors," KSII Transactions on Internet and Information Systems, vol. 13, no. 11, pp. 5370-5493, 2019. DOI: 10.3837/tiis.2019.11.006.

[ACM Style]
Xinji Tian, Qianqian Li, Xingwang Li, Hui Zhang, Khaled Rabie, and Charles Casimiro Cavalcante. 2019. Performance Analysis of Two-Way Relay NOMA Systems with Hardware Impair-ments and Channel Estimation Errors. KSII Transactions on Internet and Information Systems, 13, 11, (2019), 5370-5493. DOI: 10.3837/tiis.2019.11.006.