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System-Level Analysis of Closed-Loop Power Control in the Uplink of DS-CDMA Cellular Networks

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2 Author(s)
Mendo, L. ; Dept. of Signals, Syst. & Radiocommunications, Polytech Univ., Madrid ; Hernando, J.M.

A system-level model for power control in the uplink of direct-sequence code-division multiple access (DS-CDMA) cellular networks is presented. The model takes into account the effects of the closed loop, namely average transmit power rise, power headroom, and variable soft hand-off gains, which are not considered in existing power control models. The power control problem is analyzed in this setting, and a number of properties are derived which generalize results from the classical model without closed-loop effects. Based on this analysis, an algorithm is given that determines required transmit powers taking into account these effects. This algorithm is a generalization of classical iterative algorithms without closed-loop effects. Finally, simulation results are presented to assess the validity of the approach

Published in:

Wireless Communications, IEEE Transactions on  (Volume:6 ,  Issue: 5 )