Title :
Iterative receiver for synchronous CDMA using hidden Markov model
Author :
Khan, Ejaz ; Slock, Dirk T M
Author_Institution :
Mobile Commun. Dept., Inst. Eurecom, Sophia-Antipolis, France
Abstract :
The expectation maximization (EM) algorithm is popular in estimating the parameters of the statistical models. We consider application of the EM algorithm to maximum likelihood estimation. A hidden Markov model (HMM) formulation is used and the EM algorithm is applied to estimate the parameters of the HMM which, in turn, are used to estimate received amplitudes of the users. The proposed method is compared with that of Khan (see PIMRC, 2002) and is found to be superior.
Keywords :
amplitude estimation; code division multiple access; demodulation; hidden Markov models; iterative methods; maximum likelihood estimation; optimisation; radio receivers; statistical analysis; EM algorithm; HMM; MLE; amplitude estimation; blind demodulation; code division multiple access; expectation maximization algorithm; hidden Markov model; iterative receiver; maximum likelihood estimation; parameter estimation; statistical models; synchronous CDMA; wireless communication systems; Amplitude estimation; Code division multiplexing; Equations; Hidden Markov models; Iterative algorithms; Least squares approximation; 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.2002.1045435
