Opportunistic feedback with multiple classes in wireless systems
IEEE Communications Letters
Feedback reduction scheme for downlink multiuser diversit
IEEE Transactions on Wireless Communications
Performance analysis of downlink OFDMA resource allocation with limited feedback
IEEE Transactions on Wireless Communications
Reduced feedback and signaling schemes for sum-rate maximization in OFDMA systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Subchannel allocation in relay-enhanced OFDMA downlink with imperfect feedback
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Wideband fading channel capacity with training and partial feedback
IEEE Transactions on Information Theory
Analysis of short term fairness and its impact on packet level performance
Performance Evaluation
IEEE Transactions on Communications
Limited-rate channel state feedback for multicarrier block fading channels
IEEE Transactions on Information Theory
Multiuser diversity gain in cognitive networks
IEEE/ACM Transactions on Networking (TON)
Statistical time-access fairness index of one-bit feedback fair scheduler
Proceedings of the 6th International Conference on Queueing Theory and Network Applications
| Hi-index | 754.96 |
Opportunistic scheduling provides attractive sum-rate capacities in a multiuser network when the base-station has transmit-side channel state information (CSI), which is often estimated at the mobiles and provided to the base station via a feedback channel. This correspondence investigates opportunistic methods in the presence of limited feedback. For flat Rayleigh-fading channels, strategies with only one-bit feedback per user are demonstrated that capture the double-logarithmic capacity growth (with number of users) of full-CSI systems. Furthermore, for a given system configuration, it is shown that if the one-bit feedback is chosen judiciously, there is little to be gained by increasing the feedback rate. Our results provide optimal methods of calculating the one-bit feedback, as well as expressions for the sum-rate capacity in the one-bit feedback regime. It is shown that one may achieve proportional fairness of scheduling in this regime with no loss of throughput. For OFDM multiuser systems, the motivation for limited feedback is even more pronounced. An extension of the one-bit technique is presented for subchannel/user selection under both correlated and uncorrelated subchannel conditions, and optimal growth in capacity is demonstrated.