Title :
A novel nonlinear group-blind multiuser detection technique
Author :
Wu, Lili ; Liao, Guisheng ; Huang, Hui
Author_Institution :
Key Lab for Radar Signal Process., Xidian Univ., Xi´´an, China
Abstract :
Bayesian detection for asynchronous DS-CDMA systems with unknown interference and multipath fading is studied. A novel nonlinear group-blind multiuser detector is proposed, in which a Gibbs sampler is employed to perform the Bayesian multiuser detection according to the linear group-blind decorrelator output. It has the advantages of low complexity, high performance and wide applications. Simulation results are presented to demonstrate its effectiveness. Furthermore, in a coded system, the proposed detector is well suited for the turbo multiuser detection that is capable of finding the Bayesian solution without knowledge of prior distribution.
Keywords :
Bayes methods; code division multiple access; computational complexity; decorrelation; fading channels; multipath channels; multiuser detection; radiofrequency interference; signal sampling; spread spectrum communication; turbo codes; Bayesian detection; Gibbs sampler; asynchronous DS-CDMA; coded system; decorrelator; group-blind detection; multipath fading; multiuser detection; nonlinear detection; turbo detection; Bayesian methods; Decorrelation; Detectors; Fading; Interference; Multiaccess communication; Multiuser detection;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1202538
