Title :
Perturbation methods for canceling interference in CDMA systems
Author_Institution :
Comput. & Commun. Res. Lab., Ind. Technol. Res. Inst., Hsinchu, Taiwan
fDate :
6/23/1905 12:00:00 AM
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;
Conference_Titel :
Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on
Print_ISBN :
0-7803-7057-0
DOI :
10.1109/ICECS.2001.957418
