Title :
Distributed Power Control Algorithms in the Uplink of Wireless Systerns
Author :
Martínez-López, F.J. ; Campos-Delgado, D.U. ; Luna-Rivera, J.M.
Author_Institution :
UASLP, San Luis Potosi
Abstract :
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.
Keywords :
code division multiple access; distributed control; feedback; power control; spread spectrum communication; telecommunication control; PID control; dead-beat control; direct-sequence code-division multiple-access communication; distributed power control algorithm; uplink channel variation; wireless system; Communication system control; Control theory; Delay estimation; Distributed control; Feedback; Multiaccess communication; Power control; Power system modeling; Stability; Wireless communication; CDMA systems; Dead-Beat control; Distributed control; Power control algorithms;
Conference_Titel :
Electrical and Electronics Engineering, 2007. ICEEE 2007. 4th International Conference on
Conference_Location :
Mexico City
Print_ISBN :
978-1-4244-1166-5
Electronic_ISBN :
978-1-4244-1166-5
DOI :
10.1109/ICEEE.2007.4344986