论文标题
对功率域NOMA上行链路上行链路上的功率不平衡的分析
An Analysis of the Power Imbalance on the Uplink of Power-Domain NOMA
论文作者
论文摘要
本文分析了2用户功率域NOMA系统上行链路上的功率不平衡因子，并揭示了当用户信号按功率完美平衡（如多用户MIMO和功率控制）时，平均误差概率的最小值将达到。通过分析成对误差概率并利用误差事件的对称属性来获得分析结果。使用QPSK和16QAM信号格式以及不相关的Rayleigh褪色通道来支持此结果。这一发现导致了对电源域Noma的基本理念的质疑，并表明，无关渠道的最佳策略是完美平衡从用户那里获得的平均信号功率，并使用最大似然接收器进行检测。
This paper analyzes the power imbalance factor on the uplink of a 2-user Power-domain NOMA system and reveals that the minimum value of the average error probability is achieved when the user signals are perfectly balanced in terms of power as in Multi-User MIMO with power control. The analytic result is obtained by analyzing the pairwise error probability and exploiting a symmetry property of the error events. This result is supported by computer simulations using the QPSK and 16QAM signal formats and uncorrelated Rayleigh fading channels. This finding leads to the questioning of the basic philosophy of Power-domain NOMA and suggests that the best strategy for uncorrelated channels is to perfectly balance the average signal powers received from the users and to use a maximum likelihood receiver for their detection.
