Outer-loop control of target SIR for fast transmit power control in turbo-coded W-CDMA mobile radio

Author

Kawai, H. ; Suda, H. ; Adachi, F.

Author_Institution

NTT Mobile Commun. Network Inc., Kanagawa, Japan

Volume

35

Issue

9

fYear

1999

fDate

4/29/1999 12:00:00 AM

Firstpage

699

Lastpage

701

Abstract

A technique for obtaining outer-loop control of the target SIR for closed-loop fast transmit power control (TPC) is presented for turbo-coded wideband DS-CDMA (W-CDMA) mobile radio systems. The frame error rate (FER) of an intermediate decoding output in the turbo-decoder. i.e. before the final iteration stage is reached, is measured to control the target SIR. The bit error rate (BER) after the final decoding iteration can be maintained accurately at the prescribed BER value, e.g. BER=10^-6, without losing the tracking ability in the presence of slowly changing propagation channel conditions. Computer simulation results supporting this ability are reported

Keywords

closed loop systems; code division multiple access; mobile radio; power control; radiofrequency interference; telecommunication control; turbo codes; W-CDMA; bit error rate; closed loop fast transmit power control; computer simulation; frame error rate; multiple access interference; outer loop control; signal-to-average interference plus background noise ratio; target SIR; turbo coded wideband DS-CDMA mobile radio system;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19990481

Filename

769834