This paper studies the exploitation of triple polarization (TP) for multi-user (MU) holographic multiple-input multiple-output surface (HMIMOS) wireless communication systems, aiming at capacity boosting without enlarging the antenna array size. We specifically consider that both the transmitter and receiver are equipped with an HMIMOS comprising compact sub-wavelength TP patch antennas. To characterize TP MUHMIMOS systems, a TP near-field channel model is proposed using the dyadic Green's function, whose characteristics are leveraged to design a user-cluster-based precoding scheme for mitigating the cross-polarization and inter-user interference contributions. A theoretical correlation analysis for HMIMOS with infinitely small patch antennas is also presented. According to the proposed scheme, the users are assigned to one of the three polarizations, which is easy to implement, at the cost, however, of reducing the system's diversity. Our numerical results showcase that the cross-polarization channel components have a nonnegligible impact on the system performance, which is efficiently eliminated with the proposed MU precoding scheme.
翻译:本文研究对多用户(MU)全息多输出多输出无线通信系统三极化(TP)的利用,目的是在不扩大天线阵列尺寸的情况下提高能力,我们特别考虑到发射机和接收机都配备了由紧凑的亚波长TP补丁天线组成的三极化(MIMES),为确定TP MUMIMIMOS系统的特点,提议使用Dyadic Green的功能,TP近地信道模式,该功能的特点被用来设计一个基于用户的集群预编码计划,以减轻跨极化和用户间干扰作用。还介绍了对带有无限小的补丁天线的超能力进行理论相关分析。根据拟议办法,用户被分配到三个极化点之一,但以降低系统多样性为代价是容易做到的。我们的数字结果显示,跨极化通道组件对系统性能产生了不明显的影响,而系统性能与拟议的MUU前置计划有效消除了。