The effects of imperfect channel estimation on RBF-based multi-user DS-CDMA receivers

Author

Band, I.W. ; Cruickshank, D.G.M. ; Laurenson, D.I.

Author_Institution

Signals & Syst. Group, Edinburgh Univ., UK

Volume

2

fYear

1999

fDate

1999

Firstpage

648

Abstract

A chip-level RBF-based multi-user detector for the downlink of a system with similarities to the UTRA TD/CDMA system for UMTS is considered. The performance of this non-linear receiver, together with the MMSE linear receiver, is demonstrated to be sensitive to the estimation of the channel impulse response. Results are presented for estimation of this quantity both via a direct technique and also via adaptive techniques based on training using a pilot sequence, for both a stationary channel and a time-varying channel

Keywords

adaptive estimation; code division multiple access; dispersive channels; error statistics; land mobile radio; least mean squares methods; multipath channels; radial basis function networks; radio receivers; spread spectrum communication; telecommunication computing; time-varying channels; transient response; MMSE linear receiver; RBF-based multi-user DS-CDMA receivers; UMTS; UTRA TD/CDMA system; adaptive techniques; channel impulse response estimation; chip-level RBF-based multi-user detector; direct technique; downlink; imperfect channel estimation effects; nonlinear receiver; performance; pilot sequence; stationary channel; time-varying channel; training; 3G mobile communication; Channel estimation; Detectors; Downlink; Multiaccess communication; Multipath channels; Multiuser detection; RAKE receivers; Signal processing; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.798409

Filename

798409