We propose a unitary precoding scheme, namely polar-precoding, to improve the performance of polar-coded MIMO systems. In contrast to the traditional design of MIMO precoding criteria, the proposed polar-precoding scheme relies on the \emph{polarization criterion}. In particular, the precoding matrix design comprises two steps. After selecting a basic matrix for maximizing the capacity in the first step, we design a unitary matrix for maximizing the polarization effect among the data streams without degrading the capacity. Our simulation results show that the proposed polar-precoding scheme outperforms the state-of-the-art DFT precoding scheme.

翻译：我们提议了一个单一的预编码计划,即极地预编码计划,以改善极地编码的MSIM系统的性能。与MIMO预编码标准的传统设计相反,拟议的极地预编码计划依赖于\emph{polarization标准}。特别是,预编码矩阵设计包括两个步骤。在选择了一个基本矩阵以在第一步最大限度地提高能力之后,我们设计了一个统一矩阵,以便在不降低能力的情况下最大限度地扩大数据流之间的两极分化效应。我们的模拟结果表明,拟议的极地预编码计划优于先进的DFT预编码计划。