Hybrid precoding is a promising solution to reduce hardware cost and power consumption via decreasing the number of RF chains without causing significant performance loss for large-scale MIMO systems. In this paper, for the single-user scenarios with reduced number of RF chains, a joint hybrid precoding scheme, with high spectral efficiency and low complexity, is proposed based on the equivalent channel. Specifically, hybrid precoding and combining tasks are optimized jointly, and some operations in the original precoding scheme at the transmitter is moved to the receiver side by exploiting the concept of equivalent channel. In this manner, the hybrid precoding operation at the transmitter side is designed accurately, and thus system spectral efficiency is enhanced. Simulation results are presented to verify the effectiveness of the proposed hybrid precoding/combining scheme.

混合预编码是一种有前途的解决方案，它可以通过减少RF链的数量来降低硬件成本和功耗，而不会导致大规模MIMO系统的显着性能损失。本文针对射频链数量减少的单用户场景，提出了一种基于等效信道的频谱效率高，复杂度低的联合混合预编码方案。具体来说，混合预编码和合并任务是联合优化的，并且通过利用等效信道的概念，将发送器上原始预编码方案中的某些操作移到了接收器侧。以这种方式，在发射机侧的混合预编码操作被精确地设计，并且因此提高了系统频谱效率。