Perturbation methods for canceling interference in CDMA systems

Author

Lu, Chun

Author_Institution

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

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1143

Abstract

Based on perturbation theory, formulas for multi-user detection in CDMA systems are derived. Starting from the single user detection and applying iterative perturbations to correct for interference, we obtain better linear combination amplitudes for codes of the multi-user waveform and hence, lower bit error rate (BER). The amount of computation is much reduced by calculating the interference in frames and sliding the 3-symbol-window for all users

Keywords

code division multiple access; digital communication; error statistics; interference suppression; multiuser channels; parameter estimation; perturbation techniques; signal detection; BER reduction; CDMA systems; bit error rate; channel estimation; channel parameters; delay spread; inter-user interference; interference cancellation; iterative perturbations; linear combination amplitudes; multiuser detection; multiuser waveform; perturbation theory; sliding three-symbol-window; Bit error rate; Code division multiplexing; Delay effects; Equations; Feedback; Interference cancellation; Multiaccess communication; Multiuser detection; Perturbation methods; Physics;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on

Print_ISBN

0-7803-7057-0

Type

conf

DOI

10.1109/ICECS.2001.957418

Filename

957418