论文标题
基于恒定相变和主动/非活动开关的混合组合
Hybrid Combining Based on Constant Phase Shifters and Active/Inactive Switches
论文作者
论文摘要
在本文中，我们提出了一个新的混合模拟和数字组合构建结构，用于毫米波（MMWave）多用户多输入多输出多输出（MU-MIMO）系统。所提出的结构基于主动/非活动开关采用天线子集选择，并使用恒定相变（CPS）来控制RF电路中信号的相位。在此方案中，对于每个RF链，一个接收天线的子集比选择模拟域中的信号组合所选择的信号功率更大的接收天线，而其他接收天线则从信号组合中排除，从而提高了总和率。同时，提出的结构通过专门激活与为每个RF链选择的天线相对应的开关来降低RF电路中的功耗。我们还开发了三种低复合算法，用于每RF链天线子集选择。最后，通过数值模拟，我们表明所提出的结构比传统的混合类似物和数字组合计划提供了更高的光谱效率和更高的能源效率。
In this paper, we propose a new hybrid analog and digital combining architecture for millimeter wave (mmWave) multi-user multiple-input multiple-output (MU-MIMO) systems. The proposed structure employs antenna subset selection per radio frequency (RF) chain based on active/inactive switches and uses constant phase shifters (CPS) to control the phases of signals in the RF circuit. In this scheme, for each RF chain, a subset of receive antennas that contribute more to the desired signal power than the interference power is chosen for signal combining in the analog domain, whereas other receive antennas are excluded from signal combining, thereby enhancing sum-rates. Simultaneously, the proposed structure reduces power consumption in the RF circuit by exclusively activating switches that correspond to the antennas selected for each RF chain. We also develop three low-complexity algorithms for per-RF chain antenna subset selection. Finally, through numerical simulation, we show that the proposed structure provides higher spectral efficiency and higher energy efficiency than conventional hybrid analog and digital combining schemes for mmWave MU-MIMO systems.
