A Bilinear Equalizer for Massive MIMO Systems
A Bilinear Equalizer for Massive MIMO Systems
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DOI：
10.1109/tsp.2018.2838577
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发表时间：
2017-07
影响因子：
5.4
通讯作者：
David Neumann;Thomas Wiese;M. Joham;W. Utschick
中科院分区：
文献类型：
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作者：
David Neumann;Thomas Wiese;M. Joham;W. Utschick
我们提出了一种新的方法，低复杂度的均衡器设计非常适合蜂窝大规模MIMO系统。我们的设计允许利用协方差矩阵的信道结构，以提高性能，在面对导频污染，同时基本上保持匹配滤波器的复杂性。这是通过将均衡器限制为函数来实现的，所述函数在接收到的数据信号和来自训练阶段的观测中是双线性的。所提出的设计概括了几个以前的方法，大规模MIMO均衡器的设计。我们通过渐近分析表明，与所提出的设计的可实现的速率增长，即使在存在的导频污染的情况下，天线的数量不断增加，而没有约束。我们用数值结果证明了所提出的设计在实际的蜂窝设置中与更复杂的方法具有竞争力。
We present a novel approach for low-complexity equalizer design well suited for cellular massive MIMO systems. Our design allows to exploit the channel structure in terms of covariance matrices to improve the performance in the face of pilot-contamination, while basically keeping the complexity of a matched filter. This is achieved by restricting the equalizer to functions, which are bilinear in the received data signals and the observations from a training phase. The proposed design generalizes several previous approaches to equalizer design for massive MIMO. We show by asymptotic analysis that with the proposed design the achievable rate grows without bound for growing numbers of antennas even in the presence of pilot-contamination. We demonstrate with numerical results that the proposed design is competitive with more complex approaches in a practical cellular setup.