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Impact of open-loop power controlled feedback on multiuser capacity in Rayleigh fading channels

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3 Author(s)
E. -H. Shin ; Department of Electrical Engineering and Computer Science, Hanyang University, Ansan, 425-791 Korea ; Dongwoo Kim ; Jens Zander

This letter investigates the impact of open-loop power control (OLPC) employed in uplink (UL) feedback channel on the multiuser downlink (DL) capacity. OLPC is used to reduce the capacity loss caused by the feedback outage. Assuming flat Rayleigh channels correlated between DL and UL, we provide probability distributions on the DL SNR that are successfully fed back through UL managed by OLPC. Numerical results are used to verify the accuracy of the analysis and to show the impact of relevant parameters of OLPC on the capacity as a function of DL-UL correlation.

Published in:

IEEE Communications Letters  (Volume:13 ,  Issue: 12 )