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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.
Date of Publication: December 2009