Feedback Design in Multiuser MIMO Systems Using Quantization Splitting and Hybrid Instantaneous/Statistical Channel Information

In the design of next generation multiuser communication systems, multiple antenna transmission is an essential part providing spatial multiplexing gain and allowing efficient use of resources. A major limiting factor in the resource allocation is the amount of Channel State Information (CSI) available at the transmitter, particularly in multiuser systems where the feedback from each user terminal must be limited. To this effect the authors propose two independent approaches for an efficient representation of the channel in multiuser MIMO systems.