Title :
A Study of the Optimum Power Control Fixed Stepsize in the Presence of Power Control Loop Delay
Author :
Patachaianand, Rachod ; Sandrasegaran, Kumbesan
Author_Institution :
Univ. of Technol. Sydney, Sydney
Abstract :
Power control is one of the most important functions of wideband code division multiple access (WCDMA)-based system such as universal mobile telecommunication system (UMTS). A fixed stepsize power control algorithm is typically used in UMTS. The optimum fixed stepsize depends on the maximum Doppler frequency or user speed. This paper aims to study the optimum fixed stepsize within a range of user speeds. The simulation results show that a large fixed stepsize is optimal for a user moving fast when there is no additional loop-delay in the power control. In the presence of an additional loop-delay, a larger fixed stepsize is no longer suitable for a user moving at a high speed. In this particular scenario, power causes more fluctuations in received signal than no power control.
Keywords :
3G mobile communication; broadband networks; code division multiple access; delays; power control; telecommunication control; UMTS; WCDMA; loop delay; maximum Doppler frequency; optimum fixed stepsize power control algorithm; universal mobile telecommunication system; wideband code division multiple access; 3G mobile communication; Base stations; Delay; Error correction; Feedback; Frequency; Multiaccess communication; Power control; Power engineering and energy; Wideband;
Conference_Titel :
Wireless Broadband and Ultra Wideband Communications, 2007. AusWireless 2007. The 2nd International Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-0-7695-2846-5
Electronic_ISBN :
978-0-7695-2846-5
DOI :
10.1109/AUSWIRELESS.2007.14
