Title :
An efficient decoding technique for CDMA communication systems based on the expectation maximization algorithm
Author :
Borran, M.J. ; Nasiri-Kenari, M.
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
We present a computationally efficient algorithm for detection of superimposed signals in DS-CDMA communication systems. Using the EM algorithm we decompose the multiuser detection problem into a series of single user problems. The resultant structure includes the multistage detector of Varanasi et al. (1991) and the conventional single user detector (or linear decorrelator of Lupas et al. (1989)) as special cases
Keywords :
code division multiple access; computational complexity; decoding; maximum likelihood detection; spread spectrum communication; DS-CDMA communication systems; EM algorithm; computationally efficient algorithm; efficient decoding technique; expectation maximization algorithm; linear decorrelator; multiuser detection problem; single user problems; superimposed signals detection; Computational complexity; Covariance matrix; Decorrelation; Detectors; Gaussian noise; Maximum likelihood decoding; Maximum likelihood detection; Multiaccess communication; Multiuser detection; Signal detection;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563517
