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Distributed Power Control Algorithms in the Uplink of Wireless Systerns

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3 Author(s)

In this paper, the problem of power control in wireless systems using a distributed approach is analyzed. The uplink of a direct-sequence code-division multiple-access communication (DS-CDMA) system is studied in this work. The power control strategies are derived using classical design approaches (PID and dead-beat). It is concluded that the uplink channel variations do not destroy the stability of the feedback structures. However, the delays in the closed-loop paths can severely affect the stability and performance of the resulting feedback schemes. As a result, the control laws have to be selected according with the expected transmission delays in order to maximize the resulting performance. Simulation results are presented to compare the control algorithms using a standard single-step power correction approach.

Published in:

Electrical and Electronics Engineering, 2007. ICEEE 2007. 4th International Conference on

Date of Conference:

5-7 Sept. 2007