Title :
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
fDate :
Oct. 29 2000-Nov. 1 2000
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;
Conference_Titel :
Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-6514-3
DOI :
10.1109/ACSSC.2000.910694
