Adaptive Cooperative Non-Orthogonal Multiple Access-Based Power Line Communication

Abstract

This paper proposes an adaptive cooperative non-orthogonal multiple access (NOMA) scheme for power line communication (PLC) networks, in which the source superimposes the data symbols to two users. Specifically, the source communicates with the far-user with the assistance of relay. Meanwhile, depending on negligible 1-bit feedback, the near-user is reached through an adaptive way which switches between a direct and a cooperative data transmission mode, resulting in an enhancement of the system throughput and a more reliable data reception at the near-user. For this setting, we then analyze the system throughput over the log-normal distributed channel fading with the impulsive noise and investigate the impact of key system parameters. The simulation results validate the theoretical analysis and show that our scheme can obtain a better throughput performance with lower power consumption and reduce the electromagnetic compatibility (EMC) issues for PLC networks more efficiently than the time division multiple access (TDMA) and traditional cooperative NOMA (TCN) schemes.