Coefficient-Scaling-Based Fair Power Allocation for Multi-User Power-Domain Nonorthogonal Multiple Access Network

Abstract

Fair power allocation to the users in a power domain nonorthogonal multiple access (PD-NOMA) networks is an essential aspect. In this paper, we have proposed a coefficient-scaling-based fair power allocation scheme, for a single cell multi-user PD-NOMA network. First, we have developed a model for two users with a fixed power allocation scheme, and proposed a modified strong user fair-power allocation scheme. Furthermore, this two-user scheme is extended for an ad-hoc multi-user PD-NOMA network and a coefficient-scaling-based approach for fair power allocation is proposed to address the outage issue. The performance of the proposed schemes is evaluated through bit-error-rate, sum-rate, outage, and fairness index. The simulation results reveal a remarkable increase in fairness performance of the proposed scheme, in comparison with a state-of-the-art method.

Hybrid Multiple Access Techniques Performance Analysis Of Dynamic Resource Allocation

“…6.b) provides comparable data rates between users since the channel condition are considered while allocating resources between users. To evaluate how well the resources are allocated between users in the different proposed scenarios, Jain's fairness index (K) is measured as follows [11]:…”

“…Fixed and dynamic power allocation are employed in this scenario. The DPA algorithm used in [11] for the conventional NOMA system is applied for both HMA-I and HMA-II systems. Table I shows the system simulation parameters in this case.…”

“…A fair PA scheme for the traditional PD-NOMA technique was proposed in [11]. The authors developed models for two users and multi-user scenarios.…”