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

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 technology 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 communication 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.