Title :
Performance of SIR-based power control for UMTS
Author :
Gunaratne, S. ; Nourizadeh, S. ; Jeans, T. ; Tafazoli, R.
Author_Institution :
Surrey Univ., Guildford, UK
Abstract :
The performance of SIR-based closed-loop power control (CLPC) for the W-CDMA UTRA-FDD uplink has been evaluated. The evaluation work has been carried out using the standard deviation of the power control error (PCE) as the performance metric. Two power control algorithms (PCAs) that are currently specified by the 3rd Generation Partnership Project (3GPP) have been simulated in a vehicular environment. The results indicate that the first algorithm outperforms the second for the range of speeds considered. An optimized SIR (signal-to-interference plus noise ratio) estimation scheme is proposed. It is also shown that the multipath diversity gain that is generally observed in the wideband channel can be degraded when combining weak taps
Keywords :
cellular radio; closed loop systems; code division multiple access; diversity reception; multipath channels; multiuser channels; noise; power control; radio links; radiofrequency interference; telecommunication control; voice communication; 3rd Generation Partnership Project; 3GPP; 8 kbit/s; SIR-based power control; UMTS; W-CDMA UTRA-FDD uplink; cellular radio; closed-loop power control; multipath diversity gain; optimized SIR estimation; performance; performance metric; power control algorithms; power control error; signal-to-interference plus noise ratio; speed; standard deviation; weak taps combining; wideband channel;
Conference_Titel :
3G Mobile Communication Technologies, 2001. Second International Conference on (Conf. Publ. No. 477)
Conference_Location :
London
Print_ISBN :
0-85296-731-4
DOI :
10.1049/cp:20010004
