This study investigates the uplink performance of offset quadrature amplitude modulation (OQAM)-based orthogonal frequency division multiplexing (OFDM) waveform in single-cell multi-user massive multiple-input multiple-output (MIMO) systems over Ricean fading. An uplink training-based minimum mean square error (MMSE) channel estimation by exploiting the inherent characteristics of OFDM/OQAM waveform is briefly presented. By leveraging the second-order statistical characteristics of the intrinsic interference, the achievable uplink sum rates and corresponding closed-form approximations are derived in the presence of MMSE channel estimate at the base station with zero-forcing (ZF) and maximum-ratio combining (MRC) receivers. Based on the above analytical results for the uplink rates, power scaling laws are also investigated. The effect of Ricean- K factor on the achievable uplink sum rate is also examined analytically for both the MRC and ZF receivers. Numerical results compare the performance of OFDM/OQAM and classic cyclic-prefix OFDM-based massive MIMO systems and also validate the various analytical expressions derived in this work.

中文翻译：

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Ricean衰落中的多用户大规模MIMO–OFDM / OQAM系统的上行链路总速率分析

这项研究调查了基于莱斯正交衰落的单小区多用户大规模多输入多输出（MIMO）系统中基于偏移正交幅度调制（OQAM）的正交频分复用（OFDM）波形的上行链路性能。简要介绍了利用OFDM / OQAM波形的固有特性的基于上行链路训练的最小均方误差（MMSE）信道估计。通过利用本征干扰的二阶统计特性，在基站采用零强迫（ZF）和最大比合并的情况下，在存在MMSE信道估计的情况下，可获得可实现的上行链路总速率和相应的闭式近似值（ MRC）接收器。基于以上对于上行链路速率的分析结果，还研究了功率缩放定律。Ricean-的作用 ķ对于MRC和ZF接收器，还通过分析方式检查了可达到的上行链路总速率的相关系数。数值结果比较了OFDM / OQAM和经典的基于循环前缀OFDM的大规模MIMO系统的性能，并验证了这项工作中得出的各种分析表达式。