Hybrid Unicast/Multicast Massive MIMO Precoding for 5G Mixed Mode

This paper studies the realization of wireless video transmission by leveraging 5G mixed mode with multimedia broadcast multicast services (MBMS). In particular, it investigates a number of key elements, such as physical layer modeling and precoding strategies, for MBMS implementation with large-scale multi-input multi-output (MIMO). A novel hybrid 5G mixed mode system is proposed to seamlessly integrate unicast and multicast transmissions, wherein system architecture, user grouping strategies, interference mitigation techniques, and optimized multicast beamforming approach are comprehensively elucidated. The performance of our proposed system is assessed through comprehensive simulations and analysis. The results indicate significant improvements in coding and spectral efficiencies while combining MIMO with layer division multiplexing (LDM).