不同功率分配策略下的合作 NOMA 性能分析

Q3 Environmental Science Tikrit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI:10.25130/tjes.30.4.11
S. H. Saeed, Ibrahim Khalil Sileh
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引用次数: 0

摘要

合作无正交多址接入(C-NOMA)是 5G 及以后通信网络的一种前景广阔的方法。用户将受益于信道的全部带宽,而不受时间限制。如果没有高效的功率分配来确保用户之间的功率分配公平,NOMA 的功能就不完整。将功率管理(分配)与合作-NOMA(C-NOMA)相结合可改善系统指标。此外,还增加了物理层安全性(PLS),以确保发送和接收过程的安全,并使系统以一体化的方式工作,防止网络内外的任何干扰或窃听。本文展示了采用放大-前向(AF)和解码-前向(DF)方法的 C-NOMA 的用户和信道性能。分析通过改变功率分配技术来得出最佳系统配置。仿真结果证实了分析结论,并表明所提出的系统优于正交多址接入(OMA)、传统 NOMA 和传统合作 NOMA,在吞吐量、总和速率和中断概率方面提高了性能指标。如果功率分配设置得当,远端用户的误码率(BER)可与近端用户相同。除固定功率分配的误码率相同外,所有技术都非常出色。此外,还考虑了信道容量和中断概率。在所有实验中,不同用户数量下的信道容量略有不同。AF 和 DF 模型的广义功率分配的最佳信道容量接近 14 bps/Hz。此外,远距离用户的中断概率总是高于近距离用户和信道,当发射功率接近(4 dB)时,广义功率分配是中断概率最高的技术。
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Performance Analysis of Cooperative NOMA for Different Power Allocation Strategies
Cooperative None Orthogonal Multiple Access (C-NOMA) is a promising approach for 5G and beyond communication networks. Users will benefit from the full bandwidth of the channel without time constraints. NOMA’s features are incomplete without efficient power allocation that ensures power distribution among users fairly. Integrating power management (allocation) with Cooperative-NOMA (C-NOMA) may improve the system metrics. In addition, a physical layer security (PLS) is added to make the process of sending and receiving safe, and the system works in an integrated manner, preventing any interrupting or eavesdropping inside or outside the network. This paper demonstrates the user and channel performance of C-NOMA with Amplify-and-forward (AF) and Decode-and-forward (DF) approaches. The analysis is performed by varying the power allocation techniques to derive the best system configurations. The simulation results confirmed the analytic findings and showed that the proposed system outperforms orthogonal multiple access (OMA), conventional NOMA, and conventional cooperative NOMA, enhancing the performance metrics in terms of throughput, sum rate, and outage probability. The bit-error-rate (BER) of the far user can be identical to that of the near user if power allocation is properly set. All techniques excelled except for the fixed power allocation, which had the same BER. The Channel capacity and outage probability were also considered. A slight variation in the channel capacity in all the experiments for different numbers of users was found. The generalized power allocation for AF and DF models had the optimum channel capacity close to 14 bps/Hz. Moreover, far users always had a higher outage probability than near users and channels, and generalized power allocation was the highest outage probability technique when the transmit power was close to (4 dB).
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CiteScore
1.50
自引率
0.00%
发文量
56
审稿时长
8 weeks
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