A robust parametric technique for multipath channel estimation in the uplink of a DS-CDMA system

Authors:
Vassilis Kekatos;Athanasios A. Rontogiannis;Kostas Berberidis
Affiliations:
Department of Computer Engineering and Informatics and Research Academic Computer Technology Institute, University of Patras, Rio Patras, Greece;Institute of Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece;Department of Computer Engineering and Informatics and Research Academic Computer Technology Institute, University of Patras, Rio Patras, Greece
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2006

Citing 8
Cited 0

Communication systems engineering

Communication systems engineering
Efficient semi-blind estimation of multipath channel parameters via a delay decoupling optimization approach

Signal Processing
SAGE algorithms for multipath detection and parameter estimation inasynchronous CDMA systems

IEEE Transactions on Signal Processing
Blind adaptive interference suppression for the near-far resistantacquisition and demodulation of direct-sequence CDMA signals

IEEE Transactions on Signal Processing
Blind multiuser channel estimation in asynchronous CDMA systems

IEEE Transactions on Signal Processing
Channel estimation for the uplink of a DS-CDMA system

IEEE Transactions on Wireless Communications
A maximum likelihood approach for estimating DS-CDMA multipath fading channels

IEEE Journal on Selected Areas in Communications
Channel acquisition for wideband CDMA signals

IEEE Journal on Selected Areas in Communications

Quantified Score

Hi-index	0.00

Visualization

Abstract

The problem of estimating the multipath channel parameters of a new user entering the uplink of an asynchronous direct sequence-code division multiple access (DS-CDMA) system is addressed. The problem is described via a least squares (LS) cost function with a rich structure. This cost function, which is nonlinear with respect to the time delays and linear with respect to the gains of the multipath channel, is proved to be approximately decoupled in terms of the path delays. Due to this structure, an iterative procedure of 1D searches is adequate for time delays estimation. The resulting method is computationally efficient, does not require any specific pilot signal, and performs well for a small number of training symbols. Simulation results show that the proposed technique offers a better estimation accuracy compared to existing related methods, and is robust to multiple access interference.