Hybrid Multi-User Precoding for mmWave Massive MIMO in Frequency-Selective Channels
Hybrid Multi-User Precoding for mmWave Massive MIMO in Frequency-Selective Channels
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DOI：
10.1109/wcnc45663.2020.9120523
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发表时间：
2020-05
期刊：
影响因子：
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通讯作者：
Shijian Gao;Xiang Cheng;Liuqing Yang
中科院分区：
文献类型：
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作者：
Shijian Gao;Xiang Cheng;Liuqing Yang
研究了混合毫米波多用户多载波大规模MIMO系统下行链路收发机的设计。为了平衡处理复杂度和设计灵活性，我们采用了一种流行的混合预编码技术称为混合块对角化（HBD）的下行多用户传输。以最大化端到端互信息（EEMI）为目标，设计了一种新的虚拟EEMI辅助的两级HBD方案。除了实现复杂度低之外，所开发的方案是一种更通用的HBD解决方案，因为它不仅考虑了频率选择性，而且消除了对高分辨率模拟网络的依赖。仿真结果表明，即使在较低的硬件配置下，所提出的HBD在不同信道稀疏度下的EEMI性能仍明显优于同类算法。
This paper investigates the transceiver design for downlink hybrid mmWave multi-user multi-carrier massive MIMO systems. In order to balance the processing complexity and the design flexibility, we adopt a prevalent hybrid precoding technique named hybrid block diagonalization (HBD) for downlink multi-user transmission. Aimed at maximizing the end-to-end mutual information (EEMI), a novel virtual EEMI assisted two-stage HBD scheme is judiciously devised. Apart from a low implementing complexity, the developed scheme is a more generic HBD solution, as it not only takes the frequency selectivity into account, but also removes the reliance on the high-resolution analog network. Simulations show that, even when applied with an inferior hardware configuration, the proposed HBD could still remarkably outperform its counterparts in terms of the EEMI performance at different levels of channel sparsity.