Power consumption analysis of user-identity feedback
IEEE Communications Letters
Opportunistic CSMA/CA for achieving multi-user diversity in wireless LAN
IEEE Transactions on Wireless Communications
Multiuser Diversity with Binary Feedback
Wireless Personal Communications: An International Journal
Capacity limits of spectrum-sharing systems over hyper-fading channels
Wireless Communications & Mobile Computing
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A user-identity feedback method is proposed to achieve multi-user diversity in broadcast channels. This method associates the feedback slots with pre-determined thresholds that diminish with time, and allows feedback from those users whose channel states exceed the threshold assigned to the current slot. Since the threshold can approximate the channel state, this method requires only user-identity feedback. In Rayleigh fading channels, this method is mathematically shown to achieve the sum-rate capacity asymptotically with a large number of users, while requiring only a few feedback slots and little transmission power.