Title :
A simple Bayesian multistage interference canceller for multiuser detection in TDD-CDMA receivers
Author :
Cusani, Roberto ; Di Felice, Marco ; Mattila, Jari
Author_Institution :
INFOCOM Dept., Rome Univ., Italy
fDate :
7/1/2001 12:00:00 AM
Abstract :
A simple multiuser detector (MUD) is proposed for channels affected by severe multipath and is then suitable for time-division duplexing code-division multiple-access (TDD-CDMA) receivers. For each user, after coherent combining and despreading, a suitable “Bayesian” memoryless nonlinearity gives symbol-by-symbol the expected values of the transmitted data. These are employed for soft removal of intersymbol and multiple-access interference (MAI) from the received sequences. The procedure is iterated in a multistage structure until final decisions are taken. From the comparison with other solutions, the proposed receiver exhibits better performance (close to the ideal canceller) and equal or minor complexity
Keywords :
Bayes methods; code division multiple access; computational complexity; interference suppression; intersymbol interference; land mobile radio; multipath channels; multiuser channels; radio receivers; signal detection; Bayesian memoryless nonlinearity; Bayesian multistage interference canceller; TDD-CDMA receivers; channel estimation; code-division multiple-access; coherent combining; complexity; despreading; downlink; intersymbol interference; iterative method; mobile radio; multipath channel; multiple-access interference; multistage structure; multiuser detection; performance; received sequences; soft removal; time-division duplexing CDMA receivers; transmitted data; uplink; AWGN; Additive noise; Additive white noise; Binary phase shift keying; Gaussian noise; Interference cancellation; Intersymbol interference; Multiaccess communication; Multiple access interference; Multiuser detection;
Journal_Title :
Vehicular Technology, IEEE Transactions on
