Title :
Methods of perturbation and equalization for multi-user detection
Author_Institution :
Comput. & Commun. Res. Lab., Ind. Technol. Res. Inst., Hsinchu, Taiwan
fDate :
23 Feb.-1 March 2003
Abstract :
To simplify the solution of multi-user detection (MUD) problems in band limited CDMA systems, the approximately known function of pulse shaping is separated from the unknown time varying channel functions by blind equalization. Then, the MUD is solved by perturbation method. The iteration of perturbation and equalization corrects more errors without incurring much complexity. The simple models are used to simulate asynchronous CDMA in near/far and multi path environments, and show that the proposed methods outperform RAKE receivers.
Keywords :
blind equalisers; code division multiple access; computational complexity; multipath channels; multiuser detection; perturbation techniques; pulse shaping; radio receivers; time-varying channels; CDMA systems; MUD; RAKE receivers; blind equalization; code division multiple access; complexity; equalization method; multipath environments; multiuser detection; perturbation method; pulse shaping; time varying channels; Delay effects; Distortion; Equations; Fading; Interference; Multiaccess communication; Multipath channels; Multiuser detection; Perturbation methods; Pulse shaping methods;
Conference_Titel :
Telecommunications, 2003. ICT 2003. 10th International Conference on
Print_ISBN :
0-7803-7661-7
DOI :
10.1109/ICTEL.2003.1191622
