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On the Performance of Non-Orthogonal Multiple Access Systems with Imperfect Successive Interference Cancellation

机译：关于不完美连续干扰取消的非正交多址系统的性能

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摘要

Non-orthogonal multiple access (NOMA) technique has sparked a growing research interest due to its ability to enhance the overall spectral efficiency of wireless systems. In this paper, we investigate the pairwise error probability (PEP) performance of conventional NOMA systems, where an exact closed form expression for the PEP is derived for different users, to give some insight about the reliability of the far and near users. Through the derivation of PEP expressions, we demonstrate that the maximum achievable diversity order is proportional to the user's order. The obtained error probability expressions are used to formulate an optimization problem that minimizes the overall bit error rate (BER) under power and error rate threshold constrains. The derived analytical results, corroborated by Monte Carlo simulations, are presented to show the diversity order and error rate performance of each individual user.
机译：由于其提高了无线系统的整体谱效率，非正交多次访问（NOMA）技术引发了日益增长的研究兴趣。在本文中，我们研究了传统NOMM系统的成对误差概率（PEP）性能，其中PEP的精确闭合表达式为不同的用户推导出来，以了解远程和靠近用户的可靠性。通过PEP表达的推导，我们证明了最大可实现的分集顺序与用户的顺序成比例。所获得的误差概率表达式用于制定优化问题，其在功率和错误率阈值下最小化总体误码率（BER）。通过Monte Carlo模拟提供了源的分析结果，以显示每个用户的分集顺序和错误率性能。

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