Performance Analysis of Interference Constrained NOMA in 5G Communication

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Abstract
The aim of this paper is to analyze the achievable rate in the power domain non-orthogonal multiple access (NOMA) technique for communication between six devices through an Internet-of-Things (IoT) gateway device. In this study, we first derive the expressions for the Signal-to-Noise Ratio (SNR) and Signal-to-interference-plus-noise ratio (SINR) for the transmission between the devices, which are crucial to determine the overall system performance. The analysis also takes into account the impact of co-channel interference (CCI) at the relay node, a significant factor that affects communication reliability in NOMA systems. Furthermore, we investigate how various system parameters such as distance, transmit power, and path loss exponent influence the achievable rate, considering the dynamic nature of wireless environments. By optimizing power allocation and addressing the challenges of interference, the system can achieve higher throughput and improved reliability. This paper aims to provide a comprehensive understanding of the performance of NOMA in the context of IoT system framework, offering insights into the trade-offs involved in achieving high data rates while ensuring energy efficiency. The results are discussed in terms of the systems' response to changes in key parameters, with the goal of optimizing performance for practical IoT deployments.

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