Downlink transmit diversity schemes for CDMA networks

Author

Thompson, J.S. ; Grant, P.M. ; Mulgrew, B.

Author_Institution

Signals & Syst. Group, Edinburgh Univ., UK

Volume

147

Issue

6

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

371

Lastpage

380

Abstract

Transmit diversity schemes that have been proposed for the downlink in CDMA networks are discussed. They provide diversity gain against Rayleigh fading at the mobile which can significantly improve performance. Theoretical error formulas for convolutional codes are shown to be useful in optimising the performance of some of these techniques. Performance results from a number of simulation studies are also presented. These can be used to determine the strengths and weaknesses of the algorithms and their effect on a typical CDMA network. The effects of Rician fading and fast downlink power control on transmit diversity are discussed

Keywords

Rayleigh channels; Rician channels; code division multiple access; convolutional codes; diversity reception; error statistics; land mobile radio; multiuser channels; power control; radio networks; radio transmitters; telecommunication control; CDMA networks; IS-95 based system; Rayleigh fading; Rician fading; convolutional codes; diversity gain; downlink transmit diversity; error formulas; fast downlink power control; frame error rate; mobile radio; performance optimisation; simulation studies;

fLanguage

English

Journal_Title

Communications, IEE Proceedings-

Publisher

iet

ISSN

1350-2425

Type

jour

DOI

10.1049/ip-com:20000689

Filename

903357