Title :
Performance Improvement of Multiuser Detection Using a Genetic Algorithm in DS-CDMA UWB Systems over an Extreme NLOS Multipath Channel
Author :
Tan, Tan-Hsu ; Huang, Yung-Fa ; Lin, Chung-Weng ; Fu, Ray-Hsiang
Author_Institution :
Nat. Taipei Univ. of Technol., Taipei
Abstract :
In this paper a two-stage receiver called PRAKE-GA receiver which takes the advantages of the partial RAKE (PRAKE) receiver and genetic algorithm-based multiuser detector (GA-MUD) is proposed. In this new structure, the GA-MUD employs the output of the PRAKE receiver as its initial value to search for the best solution based on a formulated optimization mechanism. Simulation results indicate that the proposed receiver can effectively improve the performance of multiuser detection in the DS-CDMA UWB system over an extreme nonline-of-sight (NLOS) multipath channel.
Keywords :
code division multiple access; genetic algorithms; multipath channels; multiuser detection; radio receivers; ultra wideband communication; DS-CDMA UWB systems; PRAKE-GA receiver; Partial RAKE receiver; direct sequence code division multiple access; extreme NLOS multipath channel; genetic algorithm; multiuser detection; nonline-of-sight; optimization mechanism; performance improvement; two-stage receiver; ultra-wideband systems; AWGN; Degradation; Detectors; Fading; Fingers; Genetic algorithms; Multiaccess communication; Multipath channels; Multiuser detection; RAKE receivers; DS-CDMA UWB; PRAKE-GA receiver; Partial RAKE receiver; genetic algorithm-based multiuser detector (GA-MUD);
Conference_Titel :
Systems, Man and Cybernetics, 2006. SMC '06. IEEE International Conference on
Conference_Location :
Taipei
Print_ISBN :
1-4244-0099-6
Electronic_ISBN :
1-4244-0100-3
DOI :
10.1109/ICSMC.2006.385015
