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Spectral efficiency analysis of massive MIMO system

机译：大规模MIMO系统的频谱效率分析

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In this paper, we studied the massive multiple-input multiple-output (MIMO) system performance with N antenna users and streams can be multiplexed per each user. The spectral efficiency (SE) of uplink and downlink expressions is derived for any N antenna users and these achievable using estimated channels and per user basis minimum mean squared error successive interference cancellation (MMSE-SIC) detector. This MMSE-SIC analysis shows similar to asymptotic SE of linear MMSE detectors indicating that the SE increases from having multi antenna users can be harvested using linear detectors. We also generalize the power scaling laws for massive MIMO and handling arbitrary N antenna users and show that that one can reduce the multiplication of the pilot power and payload power as 1/M where M is the number of BS antennas, and still notably increase the SE with M before reaching a non-zero asymptotic limit. Simulations show that SE increase with N antenna users, also note that the same improvement can be achieved by serving N times more single-antenna users instead. Thus the additional user antennas are particular useful for SE improvements when there is few active users in the system.
机译：在本文中，我们研究了N个天线用户的大规模多输入多输出（MIMO）系统性能，并且每个用户可以复用流。上行和下行表达式的频谱效率（SE）是针对任何N个天线用户得出的，可以使用估计的信道和每个用户的最小均方误差连续干扰消除（MMSE-SIC）检测器来实现。 MMSE-SIC分析显示出与线性MMSE检测器的渐近SE相似，这表明可以使用线性检测器来收获因具有多天线用户而增加的SE。我们还推广了大规模MIMO的功率缩放定律并处理了任意N个天线用户，结果表明，可以将导频功率和有效载荷功率的乘积降低为1 / M，其中M是BS天线的数量，并且仍然明显增加了SE达到非零渐近极限之前的M。仿真表明SE随N个天线用户的增加而增加，还应注意，通过为N个天线用户提供N倍的服务，可以实现相同的改进。因此，当系统中的活动用户很少时，额外的用户天线对于SE的改进特别有用。

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