论文标题
动态混合编码依赖于双分辨率相位变速器在毫米波通信系统中
Dynamic Hybrid Precoding Relying on Twin-Resolution Phase Shifters in Millimeter-Wave Communication Systems
论文作者
论文摘要
与全RF数字同类产品相比，在降低硬件成本和功率消耗的情况下，混合模拟/数字预编码（MMWAVE）多输入多输入（MIMO）系统能够在降低硬件成本和功率消耗下实现近乎最佳的全数数字性能。但是，拥有大量相位变速器仍然是昂贵的，尤其是当相位变速器具有高分辨率时。在本文中，我们提出了一个用于MMWave MIMO系统的新型双分辨率相移网络，该网络降低了完全高分辨率网络的功耗，同时降低了完全低分辨率网络的严重阵列增长。具有不同分辨率和天线的双相变速器之间的连接是固定的或动态配置的。在后者中，我们共同设计相移网络和混合预编码矩阵，其中模拟预编码矩阵中每个条目的相位可以根据所需的分辨率动态设计。对于固定网络的混合编码矩阵，该方法对此方法进行了稍微修改。此外，我们将提出的方法扩展到多用户MIMO系统并提供其性能分析。我们的仿真结果表明，拟议的动态混合编码方法与功能消耗折衷相对于功能折衷而触动。
Hybrid analog/digital precoding in millimeter-wave (mmWave) multi-input multi-ouput (MIMO) systems is capable of achieving the near-optimal full-digital performance at reduced hardware cost and power consumption compared to its full-RF digital counterpart. However, having numerous phase shifters is still costly, especially when the phase shifters are of high resolution. In this paper, we propose a novel twin-resolution phase-shifter network for mmWave MIMO systems, which reduces the power consumption of an entirely high-resolution network, whilst mitigating the severe array gain reduction of an entirely low-resolution network. The connections between the twin phase shifters having different resolutions and the antennas are either fixed or dynamically configured. In the latter, we jointly design the phase-shifter network and the hybrid precoding matrix, where the phase of each entry in the analog precoding matrix can be dynamically designed according to the required resolution. This method is slightly modified for the fixed network's hybrid precoding matrix. Furthermore, we extend the proposed method to multi-user MIMO systems and provide its performance analysis. Our simulation results show that the proposed dynamic hybrid precoding method strikes an attractive performance vs. power consumption trade-off.
