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Journal of Information Science and Engineering, Vol. 39 No. 2, pp. 375-388

An Analytical Approach on User Rate Maximization in Two-Way Relay Communication using NOMA

1Department of Electronics Engineering
Madras Institute of Technology
Anna University
Chennai, Tamil Nadu, 600025 India

2Department of Computer Science Engineering
Velammal Engineering College
Chennai, Tamil Nadu, 600066 India
E-mail: tamizharasanmagesh@gmail.com

As more and more users are using wireless devices, the demand for higher data rate has increased. Therefore, new technologies are being developed to meet the needs. One such technique is Non-Orthogonal Multiple Access (NOMA). NOMA is an essential tech-nology for 5G wireless communication as it increases spectrum efficiency and reduces system latency. In the present work, a model for increasing the user data rate in a two-way relay communication employing NOMA scheme is proposed. The outage probability and outage ground reference expressions are derived for the system involving end-to-end com-munication via rayleigh fading channels. Based upon the above outage probabilities an efficient power allocation technique is employed which shows higher sum rate of 0.36bps/ Hz compared with random power allocation.

Keywords: NOMA, ergodic capacity, outage probability, power allocation, relay

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