论文标题
波形域NOMA：多次访问的未来
Waveform-Domain NOMA: The Future of Multiple Access
论文作者
论文摘要
本文介绍了一种新型的非正交多访问（NOMA）概念，称为波形 - 域Noma，该概念提出了同一资源元素（re）中不同波形的共存。关于每个用户设备（UES）的需求，适当地分配了适当的波形并正确地在接收器侧解码。由于与多用户多输入 - 多数输出（MU-MIMO）相比，在连续干扰取消（SIC）和通道估计错误的情况下，功率域NOMA的性能提高，NOMA不再被视为3GPP中的工作意愿。新型的波形域NOMA概念为功率域NOMA方案的问题以及在可靠性，延迟和能源效率方面的灵活性提供了一种补救措施。为了减轻SIC误差，使用低密度平价检查（LDPC）代码辅助软干扰取消技术。在数值评估中，提出的波形域NOMA方案在功率平衡的情况下优于常规功率域NOMA。
This paper introduces a novel non-orthogonal multiple access (NOMA) concept named waveform-domain NOMA, which proposes the coexistence of different waveforms in the same resource element (RE). Regarding the demands of each user equipments (UEs), appropriate waveforms are assigned intelligently and decoded at the receiver side properly. Since the performance gain of power-domain NOMA compared to multi-user multiple-input-multiple-output (MU-MIMO) degrades in the case of successive interference cancellation (SIC) and channel estimation errors, NOMA is not considered as a work-item in 3GPP anymore. The novel waveform-domain NOMA concept provides a remedy for the problems of the power-domain NOMA scheme as well as flexibility in terms of reliability, latency, and energy efficiency. To mitigate SIC errors, low-density parity-check (LDPC) codes aided soft interference cancellation technique is used. As numerically evaluated, the proposed waveform-domain NOMA scheme outperforms the conventional power-domain NOMA in the power-balanced scenario.
