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Reduced Feedback Schemes Using Random Beamforming in MIMO Broadcast Channels
IEEE Transactions on Signal Processing
A random beamforming scheme for the Gaussian MIMO broadcast channel with channel quality feedback is investigated and extended. Considering the case where the receivers each have receive antennas, the effects of feeding back various amounts of signal-to-interference-plus-noise ratio (SINR) information are analyzed. Using the results from order statistics of the ratio of a linear combination of exponential random variables, the distribution function of the maximum order statistic of the SINRdoi:10.1109/tsp.2009.2038422 fatcat:qmwu7m5cajhjncznh2qnmengqe