Bidirectional MMSE Algorithms for Interference Mitigation in CDMA Systems over Fast Fading Channels
Abstract
This paper presents adaptive bidirectional minimum mean-square error (MMSE) parameter estimation algorithms for fast-fading channels. The time correlation between successive channel gains is exploited to improve the estimation and tracking capabilities of adaptive algorithms and provide robustness against time-varying channels. Bidirectional normalized least mean-square (NLMS) and conjugate gradient (CG) algorithms are devised along with adaptive mixing parameters that adjust to the time-varying channel correlation properties. An analysis of the proposed algorithms is provided along with a discussion of their performance advantages. Simulations for an application to interference suppression in DS-CDMA systems show the advantages of the proposed algorithms.
Cite
@article{arxiv.1306.2362,
title = {Bidirectional MMSE Algorithms for Interference Mitigation in CDMA Systems over Fast Fading Channels},
author = {Patrick Clarke and Rodrigo C. de Lamare},
journal= {arXiv preprint arXiv:1306.2362},
year = {2013}
}
Comments
3 figures, ISWCS, 2012