Title :
Iterative blind demodulation of synchronous CDMA
Author :
Khan, Ejaz ; Slock, Dirk T M
Author_Institution :
Mobile Commun. Dept., Inst. Eure com, Sophia-Antipolis, France
Abstract :
In this paper iterative blind estimation of the complex amplitudes of the users is considered. A Gaussian mixture model formulation of the problem is introduced and the expectation maximization (EM) algorithm for estimation of parameters for a Gaussian mixture observation model is used. Simulation results compare the performance of the proposed algorithm with the Cramer-Rao bound.
Keywords :
Gaussian processes; code division multiple access; demodulation; iterative methods; multiuser channels; optimisation; parameter estimation; Cramer-Rao bound; Gaussian mixture model; complex amplitudes; expectation maximization algorithm; iterative blind demodulation; iterative blind estimation; parameter estimation; simulation results; synchronous CDMA; wireless communication systems; Amplitude estimation; Code division multiplexing; Demodulation; Iterative algorithms; Least squares approximation; Matrix decomposition; Maximum likelihood estimation; Mobile communication; Multiaccess communication; Parameter estimation;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1045434
