Energy-Efficient Hybrid Precoding Design for Mm-Wave Massive Antenna Multi-User Systems

摘要

In this paper, a new hybrid precoding architecture and corresponding precoding algorithm is proposed for mm-wave massive antenna multi-user systems, which can realize a good trade-off between hardware and spectral efficiency. The proposed switch and inverter based group-connected (SIG) architecture is an extension of the switch and inverter structure with antenna selection (SIAS), while can make a flexible trade-off between hardware cost and system performance by adjusting the parameter m. In addition, an alternation minimization (AM) algorithm is presented to obtain the hybrid precoding matrix. Simulation results show that the proposed SIG-based AM hybrid precoder outperforms the SIAS-based coordinate update algorithm (CUA) precoder both in spectral efficiency and energy efficiency. And the required iteration number of AM is about 10, which is far less than that of the CUA algorithm.