Efficient Quantization for Feedback in MIMO Broadcasting Systems

We consider the problem of joint multiplexer-scheduler design for transmitting independent data streams over a Gaussian multiple-antenna broadcast channel in which feedback is used to convey channel state information from receivers to the transmitter. It is known that various low complexity strategies can achieve the optimal rate scaling as a function of receiver population size. In this work we develop a simple and efficient quantization strategy for use on the feedback link of such architectures.