Blind multiuser detection for long-code multipath CDMA

Author

Yang, Zigang ; Wang, Xiaodong

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

2

fYear

2000

fDate

Oct. 29 2000-Nov. 1 2000

Firstpage

1148

Abstract

We consider the problem of demodulating the multiuser information symbols in an uplink asynchronous CDMA system employing long (aperiodic) spreading sequences in unknown multipath channels. A novel blind Bayesian multiuser detector is derived for jointly channel estimation and symbol detection. Such a detector is based on the Bayesian inference of all unknown quantities. The Gibbs sampler, a Markov chain Monte Carlo (MCMC) procedure, is then used for Bayesian computation.

Keywords

Bayes methods; Markov processes; Monte Carlo methods; cellular radio; code division multiple access; demodulation; fading channels; inference mechanisms; multipath channels; multiuser channels; parameter estimation; pseudonoise codes; signal detection; signal sampling; spread spectrum communication; Bayesian inference; Gibbs sampler; Markov chain Monte Carlo procedure; aperiodic spreading sequences; blind Bayesian multiuser detector; blind multiuser detection; cellular radio; channel estimation; demodulation; long spreading sequences; long-code multipath CDMA; multipath channels; multiuser information symbols; pseudo-random spreading sequences; symbol detection; uplink; uplink asynchronous CDMA system; Bayesian methods; Channel estimation; Code standards; Detectors; Matched filters; Monte Carlo methods; Multiaccess communication; Multipath channels; Multiuser detection; Propagation delay;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-6514-3

Type

conf

DOI

10.1109/ACSSC.2000.910694

Filename

910694