Optical Wireless Communication networks (OWC) has emerged as a promising technology that enables high-speed and reliable communication bandwidth for a variety of applications. In this work, we investigated applying Random Linear Network Coding (RLNC) over NOMA-based OWC networks to improve the performance of the proposed high density indoor optical wireless network where users are divided into multicast groups, and each group contains users that slightly differ in their channel gains. Moreover, a fixed power allocation strategy is considered to manage interference among these groups and to avoid complexity. The performance of the proposed RLNC-NOMA scheme is evaluated in terms of average bit error rate and ergodic sum rate versus the power allocation ratio factor. The results show that the proposed scheme is more suitable for the considered network compared to the traditional NOMA and orthogonal transmission schemes.

翻译：光无线通信网络（OWC）已成为一种有前途的技术，可为多种应用提供高速可靠的通信带宽。本文研究了在基于NOMA的OWC网络中应用随机线性网络编码（RLNC），以提升所提出的高密度室内光无线网络的性能。该网络将用户划分为组播组，每组内用户的信道增益略有差异。同时，采用固定功率分配策略来管理各组之间的干扰，并避免复杂性。通过平均误码率和遍历和速率随功率分配比率因子的变化，评估了所提出的RLNC-NOMA方案的性能。结果表明，与传统NOMA和正交传输方案相比，所提方案更适用于所考虑的网络。