Users Capacity Upper Bound of Multi-Pair Massive MIMO AF Relay System under Pilot Contamination

Mohamed Ali Soliman, A. Mehana, M. Nafie
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Abstract

Massive MIMO relay system promises large spectral and energy efficiencies. It also allows admitting more users in the network with controlled quality of service. In this paper, we seek the answer of the following question: what is the maximum number of users that can be admitted in a two-way relay network with massive number of antennas at the relay side and subject to a minimum quality of service at the user side? In order to answer this question, we develop lower bound on the achievable user rate which we then use to bound the maximum number of the admissible users.We also study the effect of the non orthogonality of the pilot sequences on the user capacity in a small cell (dense) network and propose an interference mitigation scheme which improves the spectral efficiency. It is shown that large number of users can coexist using the proposed scheme.
导频污染下多对大规模MIMO AF中继系统的用户容量上限
大规模MIMO中继系统保证了高频谱和能源效率。它还允许在控制服务质量的情况下允许更多的用户进入网络。在本文中,我们寻求以下问题的答案:在中继端有大量天线且用户端服务质量最低的双向中继网络中,可以允许的最大用户数量是多少?为了回答这个问题,我们建立了可实现的用户速率的下界,然后我们用它来约束允许的最大用户数量。研究了导频序列的非正交性对小小区(密集)网络中用户容量的影响,并提出了一种提高频谱效率的干扰抑制方案。结果表明,采用该方案可以实现大量用户共存。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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