Multi-Layer Downlink Precoding for Cloud-RAN Systems Using Full-Dimensional Massive MIMO
Full-dimensional (FD) massive multiple-input multiple-output (MIMO) has recently emerged as one of the Pocket POP! physical layer enablers of 5G systems.Grounded on prior work on layered precoding, a novel framework for low-complexity multi-layer downlink precoding in multi-cluster cloud radio access network (C-RAN) systems using FD massive MIMO is