Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.798409
