NOMA 系统的成立条件及性能分析
首发时间:2022-03-01
摘要:针对功率域协作非正交多址接入(Non-Orthogonal Multiple Access,NOMA)系统通信的成立条件进行推导并分析了功率分配对系统性能的影响。为了进一步分析NOMA下行通信模型中强弱用户的通信质量及串行干扰消除(Successive Interference Cancellation,SIC)成功解码的约束条件,本文以用户的可达速率为性能分析指标研究了在不同约束条件下功率分配因子的取值范围,并在该取值范围中分析了系统最大和速率与功率分配因子之间的关系。蒙特卡罗仿真结果证明了本文公式推导结论的正确性,分析了不同参数变量对NOMA系统通信性能的影响,并对NOMA与OMA(Orthogonal Multiple Access,OMA)的通信质量进行了对比分析。
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Analysis of the establishment condition and performance for NOMA Systems
Abstract:The establishment conditions of non-orthogonal Multiple Access (NOMA) system communication in power domain collaboration are derived and the influence of power allocation on system performance is analyzed. In order to further analyze the quality of service of strong and weak users and the constraints for successful decoding of serial Interference Cancellation (SIC) in NOMA downlink communication model, in this paper, the value range of power allocation factor under different constraints is studied with the user\'s reachable rate as performance analysis index, and the relationship between system maximum sum rate and power allocation factor is analyzed in this value range. Monte Carlo simulation results prove the correctness of the proposed formula. The effects of different parameter variables on the communication performance of NOMA systems are analyzed, and the quality of service of Orthogonal Multiple Access (OMA) systems and NOMA systems are compared.
Keywords: wireless communication non-orthogonal multiple access successive interference cancellation power allocation
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