This letter develops practical linear precoding and stream combining techniques for rate-splitting (RS) in multiuser multiple-input multiple-output (MIMO) systems. We propose linear combining techniques based on the Min-Max, the maximum ratio and the minimum mean-square error criteria along with Regularized Block Diagonalization (RBD) precoders for RS-based multiuser multiple-antenna systems. An analysis of the sum rate performance is carried out, leading to closed-form expressions. Simulations show that the proposed combining schemes offer a significant sum rate performance gain over conventional linear precoding schemes.

中文翻译：

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用于多用户 MIMO 系统中速率分裂的线性预编码和流组合

这封信为多用户多输入多输出 (MIMO) 系统中的速率拆分 (RS) 开发了实用的线性预编码和流组合技术。我们为基于 RS 的多用户多天线系统提出了基于 Min-Max、最大比率和最小均方误差标准以及正则化块对角化 (RBD) 预编码器的线性组合技术。对总速率性能进行分析，得出封闭形式的表达式。仿真表明，与传统的线性预编码方案相比，所提出的组合方案提供了显着的总速率性能增益。