论文标题
关节在RIS辅助的MIMO系统中接收天线选择和波束形成
Joint Receive Antenna Selection and Beamforming in RIS-Aided MIMO Systems
论文作者
论文摘要
这项工作研究了可重新配置的智能表面（RIS）多源多输入多输出系统的低复杂性设计。基站（BS）适用于接收天线选择，以将其天线的子集连接到可用的射频链中。对于此设置，联合设计了BS开关网络，上行链路预编码器和RIS相移，因此上行链路总和率是最大化的。原理设计问题将其减少到NP硬化的混合企业优化。因此，我们调用加权的最小平方误差技术和惩罚双重分解方法，以开发一种可拖动的迭代算法，可有效地近似最佳设计。与基准相比，我们的数值研究验证了拟议算法的效率及其出色的性能。
This work studies a low-complexity design for reconfigurable intelligent surface (RIS)-aided multiuser multiple-input multiple-output systems. The base station (BS) applies receive antenna selection to connect a subset of its antennas to the available radio frequency chains. For this setting, the BS switching network, uplink precoders, and RIS phase-shifts are jointly designed, such that the uplink sum-rate is maximized. The principle design problem reduces to an NP-hard mixed-integer optimization. We hence invoke the weighted minimum mean squared error technique and the penalty dual decomposition method to develop a tractable iterative algorithm that approximates the optimal design effectively. Our numerical investigations verify the efficiency of the proposed algorithm and its superior performance as compared with the benchmark.
