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Adaptive User Pairing for NOMA Systems With Imperfect SIC
IEEE Wireless Communications Letters ( IF 6.3 ) Pub Date : 2021-04-19 , DOI: 10.1109/lwc.2021.3074036
Nemalidinne Siva Mouni , Abhinav Kumar , Prabhat K. Upadhyay

Non-orthogonal multiple access (NOMA) has been recognized as a key driving technology for the fifth generation (5G) and beyond 5G cellular networks. For a practical downlink NOMA system with imperfect successive interference cancellation (SIC), we derive bounds on power allocation factors and formulate a minimum signal-to-interference-plus-noise ratio (SINR) difference criterion for NOMA pair formation. Through extensive simulations, we show the effect of imperfect SIC on the rate performance of a NOMA pair and the trade-off with its OMA (orthogonal multiple access) counterparts. We propose an adaptive user pairing (A-UP) algorithm for achieving better user rates. Further, the proposed A-UP algorithm results in better performance than state-of-the-art NOMA pairing algorithms in the presence of SIC imperfections.

中文翻译:

具有不完美 SIC 的 NOMA 系统的自适应用户配对

非正交多址 (NOMA) 已被公认为第五代 (5G) 及 5G 蜂窝网络之后的关键驱动技术。对于具有不完善的连续干扰消除 (SIC) 的实际下行链路 NOMA 系统,我们推导出功率分配因子的界限,并为 NOMA 对形成制定了最小信号干扰加噪声比 (SINR) 差值标准。通过广泛的模拟,我们展示了不完美 SIC 对 NOMA 对速率性能的影响以及与其 OMA(正交多路访问)对应物的权衡。我们提出了一种自适应用户配对 (A-UP) 算法以实现更好的用户速率。此外,在存在 SIC 缺陷的情况下,所提出的 A-UP 算法比最先进的 NOMA 配对算法具有更好的性能。
更新日期:2021-04-19
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