Title :
Markov chain models for the investigation of fast power control for FDD-UMTS
Author :
Fahmer, Achim ; Fecker, Ulrich
Abstract :
Transmission power control (TPC) is essential in third generation systems for several reasons. Fast power control (or closed-loop power control) is intended to track fast channel fading. We investigate fast power control for FDD-UMTS with the help of Markov chain models in order to obtain analytical results of the performance. The effect of TPC errors and SIR estimation errors is explained. The Markov chain models are derived for small velocities, but can be considered as bounds for moderate speeds as well. We also explain how SIR estimation errors can be modelled as TPC errors.
Keywords :
3G mobile communication; Markov processes; closed loop systems; fading channels; frequency division multiplexing; parameter estimation; power control; telecommunication control; FDD-UMTS; Markov chain models; SIR estimation errors; closed-loop power control; fast fading channel; fast power control; third generation systems; transmission power control;
Conference_Titel :
Personal Mobile Communications Conference, 2003. 5th European (Conf. Publ. No. 492)
Print_ISBN :
0-85296-753-5
DOI :
10.1049/cp:20030318
