Nonorthogonal multiple access systems optimization to ensure maximum fairness to users,Transactions on Emerging Telecommunications Technologies

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Nonorthogonal multiple access systems optimization to ensure maximum fairness to users
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2020-02-05 , DOI: 10.1002/ett.3875
Jaime L. Jacob ₁ , Taufik Abrão ₁

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In this contribution, the optimization of power proportion allocated for each user in the downlink (DL) nonorthogonal multiple access (NOMA) systems have been developed. Successive interference cancellation technique recovers users' signal with high difference between channel gains, to find the lowest optimum power proportion required to guarantee an equal data rate for all active users. Following the same approach, the optimum power proportion for each user and also the minimum total power to achieve the same rate for all users (maximum fairness) were obtained as a design goal. Moreover, the same design methodology was developed seeking to maximize the NOMA system energy efficiency (EE). It was possible to find the maximum EE point and the respective power distribution among the users for a certain circuitry power consumption. For all NOMA users, in which the optimal operation point for EE maximization was parameterized, it was possible to find the total power, power ratio, and the equal rate values. As a result, one can find the trade‐off point between EE and sum rate for each system scenario, as well as the best resource efficiency operation point. By considering the same rate for all users, the system attains maximum fairness among the users.

中文翻译：

非正交多路访问系统优化，以确保最大程度地公平对待用户

在此贡献中，已经开发了在下行链路（DL）非正交多路访问（NOMA）系统中为每个用户分配的功率比例的优化。连续干扰消除技术以信道增益之间的高差异恢复用户信号，从而找到最低的最佳功率比例，以保证所有活动用户的数据速率均等。按照相同的方法，获得每个用户的最佳功率比例以及为所有用户实现相同速率的最小总功率（最大公平性）作为设计目标。此外，开发了相同的设计方法，以寻求最大程度地提高NOMA系统能效（EE）。对于特定的电路功耗，可以找到最大EE点以及用户之间的相应功率分配。对于所有参数化了EE最大化的最佳运行点的NOMA用户，都可以找到总功率，功率比和相等的速率值。结果，可以找到每种系统场景的EE和总速率之间的折衷点，以及最佳的资源效率操作点。通过为所有用户考虑相同的费率，系统可以获得用户之间的最大公平性。

更新日期：2020-02-05

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