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A multiple transmit antenna, single receive antenna (per receiver) downlink channel with limited channel feedback is considered. Given a constraint on the total system-wide channel feedback, the following question is considered: is it preferable to get low-rate feedback from a large number of receivers or to receive high-rate/high-quality feedback from a smaller number of (randomly selected) receivers? Acquiring feedback from many users allows multi-user diversity to be exploited, whiledoi:10.1109/icc.2008.693 dblp:conf/icc/RavindranJ08 fatcat:tyq7qs2mcbg6dosjeqdw42es6m