Performance of SIR-based power control for UMTS

Author

Gunaratne, S. ; Nourizadeh, S. ; Jeans, T. ; Tafazoli, R.

Author_Institution

Surrey Univ., Guildford, UK

fYear

2001

fDate

2001

Firstpage

16

Lastpage

20

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 3^rd 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; 3^rd 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;

fLanguage

English

Publisher

iet

Conference_Titel

3G Mobile Communication Technologies, 2001. Second International Conference on (Conf. Publ. No. 477)

Conference_Location

London

ISSN

0537-9989

Print_ISBN

0-85296-731-4

Type

conf

DOI

10.1049/cp:20010004

Filename

923499