Title :
Multiuser Channel Estimation and Tracking for MC-CDMA Uplink Transmissions
Author :
Sanguinetti, Luca ; Morelli, Michele
Author_Institution :
Dept. of Inf. Eng., Pisa Univ.
Abstract :
We discuss channel acquisition and tracking in the uplink of a multi-carrier code-division multiple-access (MC-CDMA) system. Channel acquisition is performed jointly with noise power estimation following two different approaches. The first assumes independently faded subcarriers while the second exploits the fading correlation across the signal bandwidth to improve the system performance. Both schemes are based on maximum likelihood (ML) reasoning and exploit some training blocks carrying known symbols. Channel tracking is pursued through least-mean square (LMS) techniques, using data decisions provided by a partial parallel interference cancellation (PPIC) receiver
Keywords :
channel estimation; code division multiple access; fading channels; interference suppression; least mean squares methods; maximum likelihood estimation; multiuser channels; radio links; radiofrequency interference; LMS; MC-CDMA uplink transmissions; channel acquisition; channel tracking; fading correlation; least-mean square techniques; maximum likelihood reasoning; multicarrier code-division multiple-access; multiuser channel estimation; partial parallel interference cancellation; Channel estimation; Fading; Interference cancellation; Least squares approximation; Maximum likelihood estimation; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Multiuser channels; Noise cancellation;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651437
