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NOMA-2000 Versus PD-NOMA: An Outage Probability Comparison
IEEE Communications Letters ( IF 4.1 ) Pub Date : 2020-10-26 , DOI: 10.1109/lcomm.2020.3033727
Ismail Cosandal 1 , Mutlu Koca 1 , Ezio Biglieri 2 , Hikmet Sari 3
Affiliation  

Non-orthogonal multiple access (NOMA) is an emerging technique promising to accommodate the increasing data rate requirements of next generation networks. In power-domain (PD) NOMA, this challenge is addressed by allocating two or more users on each orthogonal resource block while assigning significantly different power levels to all users. Recently, an interesting alternative to conventional PD-NOMA has been NOMA-2000 where multiple access is done using two sets of orthogonal waveforms. In this letter we make a comparison of these two NOMA schemes based on their outage probabilities where the analytical expressions are derived without any simplifying assumption about the statistical dependencies caused by the presence of more than one user signal in each resource block. These derivations are validated by computer simulation results, which appear in tight agreement with the analysis and corroborate the claim that NOMA-2000 may significantly outperform PD-NOMA under realistic channel conditions and with different overload factors.

中文翻译:

NOMA-2000与PD-NOMA:停机概率比较

非正交多址访问(NOMA)是一种新兴技术,有望满足下一代网络不断增长的数据速率要求。在功率域(PD)NOMA中,可以通过在每个正交资源块上分配两个或更多用户,同时为所有用户分配明显不同的功率水平来解决此难题。最近,传统的PD-NOMA的一个有趣替代方法是NOMA-2000,其中使用两组正交波形进行多路访问。在这封信中,我们将基于这两种NOMA方案的中断概率进行比较,在这种分析方案中,无需对每个资源块中存在多个用户信号而导致的统计依赖性进行任何简化假设即可得出分析表达式。这些推导已通过计算机仿真结果验证,
更新日期:2020-10-26
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