Effect of feedback prediction on OFDMA system throughput
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Partial CSI feedback scheme for subchannel allocation in multiuser OFDM systems
ICT'09 Proceedings of the 16th international conference on Telecommunications
Limited feedback multiuser MIMO techniques for time-correlated channels
EURASIP Journal on Advances in Signal Processing - Multiuser MIMO Transmission with Limited Feedback, Cooperation, and Coordination
IEEE Transactions on Wireless Communications
Energy-efficient opportunistic scheduling schemes in wireless networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Computer Networks: The International Journal of Computer and Telecommunications Networking
Opportunistic downlink data delivery for mobile collaborative communities
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Opportunistic scheduling provides a good chance to improve wireless system performance by exploiting the underlying channel condition. There has been a lot of work on opportunistic scheduling, but the problem of finding the right feedback mechanism to convey channel information has largely been untouched. In emerging multichannel systems, the per- channel feedback induces a substantial amount of feedback overhead and requires high computational complexity. To reduce the feedback overhead, we consider an opportunistic feedback strategy that activates the channel feedback opportunistically according to the channel condition. Then, we combine the opportunistic feedback with the best-n channel feedback scheme where a mobile user chooses the best n channels and transfers this information to the base station. We analyze the throughput and the amount of channel feedback information for proportionally fair opportunistic scheduling under Rayleigh fading i.i.d. channels. The numerical results confirm that our partial feedback schemes achieve a remarkable reduction in the amount of feedback information at the cost of slight throughput degradation, thereby saving the scarce wireless uplink bandwidth and limited battery power.