Methods of perturbation and equalization for multi-user detection

Author

Lu, Chun Chian

Author_Institution

Comput. & Commun. Res. Lab., Ind. Technol. Res. Inst., Hsinchu, Taiwan

Volume

2

fYear

2003

fDate

23 Feb.-1 March 2003

Firstpage

1294

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications, 2003. ICT 2003. 10th International Conference on

Print_ISBN

0-7803-7661-7

Type

conf

DOI

10.1109/ICTEL.2003.1191622

Filename

1191622