Title :
Multiuser DA-ML estimation of multipath channel delays for a DS-CDMA uplink
Author :
Guenach, M. ; Vandendorpe, L.
Author_Institution :
Commun. & Remote Sensing Lab., Univ. Catholique de Louvain, Belgium
Abstract :
This paper deals with the synthesis and the performance analysis of multiuser delay estimators of multipath channels according to the maximum likelihood (ML) criterion in data aided (DA) mode for a BPSK DS-CDMA uplink. We suppose the channel tap weights are known perfectly, and we are interested in the estimation of the path delays. We perform open-loop (S-curve) and closed loop mean squared estimated error (MSEE) analysis in tracking mode and we compare the results to the classical Cramer-Rao lower bound (CRLB)
Keywords :
code division multiple access; delay estimation; maximum likelihood estimation; mean square error methods; multipath channels; multiuser channels; phase shift keying; spread spectrum communication; BPSK; DS-CDMA uplink; MSEE analysis; S-curve mean squared estimated error analysis; channel tap weights; closed loop mean squared estimated error analysis; data aided mode; maximum likelihood criterion; multipath channel delays; multiuser DA-ML estimation; multiuser delay estimators; open-loop mean squared estimated error analysis; path delays; performance analysis; synthesis; tracking mode; Additive noise; Additive white noise; Delay estimation; Gaussian noise; Maximum likelihood estimation; Multiaccess communication; Multipath channels; Performance analysis; Timing; Tracking loops;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2000. PIMRC 2000. The 11th IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-6463-5
DOI :
10.1109/PIMRC.2000.881592
