학술논문
Non-orthogonal multiple access with transmit diversity for low latency and massive connection
Document Type
Conference
Source
2023 IEEE 34th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) Personal, Indoor and Mobile Radio Communications (PIMRC), 2023 IEEE 34th Annual International Symposium on. :1-6 Sep, 2023
Subject
Language
ISSN
2166-9589
Abstract
The Internet of Things (IoT) has recently gained widespread adoption. In the context of IoT communications beyond 5G, both low latency and massive connectivity play an important role in mission-critical communication. To meet these requirements, a beyond 5G system utilizing configured grant (CG) and non-orthogonal multiple access (NOMA) is proposed, which reduces latency and increases the number of user equipment (UE) accommodated at gNodeB (gNB), respectively. Among the NOMA schemes, the power domain (PD) NOMA is considered to be one of the most promising methods because it has a lesser impact on 5G specifications. This paper aims to investigate the CG-PD-NOMA system with transmit diversity (TD) to enhance reliability for uplink communications. TD mitigates fading fluctuations that deteriorate the throughput of CG-PD-NOMA with successive interference cancellation (SIC). A computer simulation was conducted to assess the performance of the proposed CG-PD-NOMA system with TD. The results indicate that TD effectively decreases BLER and improves throughput by approximately 3%.