Title :
Joint iterative interference cancellation and parameter estimation for cdma systems
Author :
De Lamare, Rodrigo C. ; Sampaio-Neto, Raimundo ; Hjørungnes, Are
Author_Institution :
Univ. of York, York
fDate :
12/1/2007 12:00:00 AM
Abstract :
This letter proposes a unified approach to joint iterative parameter estimation and interference cancellation (IC) for uplink CDMA systems in multipath channels. A unified framework is presented in which the IC problem is formulated as an optimization problem of an IC parameter vector for each stage and user. We also propose detectors based on a least-squares (LS) joint optimization method for estimating the linear receiver filter front-end, the IC, and the channel parameters. Simulations for the uplink of a synchronous DS-CDMA system show that the proposed methods significantly outperform the best known IC schemes.
Keywords :
interference suppression; iterative methods; least squares approximations; multipath channels; optimisation; parameter estimation; channel parameters; iterative interference cancellation; least-squares joint optimization; linear receiver filter front-end; multipath channels; optimization problem; parameter estimation; synchronous DS-CDMA system; uplink CDMA systems; Detectors; Integrated circuit modeling; Interference cancellation; Iterative methods; Matched filters; Multiaccess communication; Optimization methods; Parameter estimation; Silicon carbide; Vectors;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.070943
