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Performance analysis of ABCom NOMA systems for 6G with generalized hardware impairments
Physical Communication ( IF 2.2 ) Pub Date : 2022-08-12 , DOI: 10.1016/j.phycom.2022.101851
Dongkai Cui , Gaojian Huang , Yike Zheng , Hui Guo , Junxia Li , Xingwang Li

With the continuous emergence of new smart applications, the number of smart devices is increasing exponentially. Therefore, it is a great challenge to meet the rising network demands for the sixth generation (6G) communication. To solve the above problem, non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) technologies are introduced. However, deploying a large number of low cost components, all nodes are prone to hardware non-ideal, and the system performance is limited by the imperfect factors of in-phase and quadrature-phase imbalance (IQI) and residual hardware impairments (RHIs). Motivated by this, this paper considers an AmBC-NOMA communication system with both IQI and RHIs. In particular, we derive the analytic expressions for outage probability (OP) and ergodic rate (ER) of each node for the cases of ideal and non-ideal conditions. In order to get further insights, we analyze the asymptotic behavior of OPs and ERs at high signal-to-noise ratios (SNRs). The comparison of theoretical analysis and Monte Carlo simulation show that: (1) IQI and RHIs have negative impacts on the effectiveness and reliability of the system; (2) As the transmit SNR increases, the OP of each node converges to a non-zero constant, resulting in the diversity order approaches zero; (3) The ER of Uf is less affected by these two non-ideal factors; (4) RHIs have a greater impact on the ER of Un than Uf.



中文翻译:

具有广义硬件损伤的 6G ABCom NOMA 系统的性能分析

随着新型智能应用的不断涌现,智能设备的数量呈指数级增长。因此,如何满足日益增长的第六代(6G)通信网络需求是一个巨大的挑战。为了解决上述问题,引入了非正交多路访问(NOMA)和环境反向散射通信(AmBC)技术。然而,部署大量低成本组件,所有节点都容易出现硬件不理想,系统性能受到同相和正交相位不平衡(IQI)和残余硬件损伤(RHI)等不完善因素的限制。 . 受此启发,本文考虑了一个同时具有 IQI 和 RHI 的 AmBC-NOMA 通信系统。尤其是,我们推导出了理想和非理想情况下每个节点的中断概率(OP)和遍历率(ER)的解析表达式。为了获得进一步的见解,我们分析了 OP 和 ER 在高信噪比 (SNR) 下的渐近行为。理论分析与蒙特卡罗模拟对比表明:(1)IQI 和 RHI 对系统的有效性和可靠性有负面影响;(2)随着发射信噪比的增加,每个节点的 OP 收敛到一个非零常数,导致分集阶数趋近于零;(3)急诊室üF受这两个非理想因素的影响较小;(4)RHI 对 ER 的影响更大ünüF.

更新日期:2022-08-12
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