Title :
Interpolation based channel estimation methods for DS-CDMA systems in Rayleigh multipath channels
Author :
Ouertani, Karim ; Saoudi, Samir ; Ammar, Mahmoud
Author_Institution :
Signal & Commun. Dept., Telecom Bretagne, Brest, France
Abstract :
This paper presents a comparative investigation of different channel estimation methods for pilot based coherent RAKE combining in DS-CDMA transmission systems. The channel estimation algorithms are based on interpolation of the channel statistics from pilot symbols. The methods for channel estimation are analyzed and compared in terms of BER performance in a multipath channel. Third order Lagrange interpolation is found to be a good choice for channel estimation since it exhibits the best performance with small computational complexity. Mean square error (MSE) for the discussed methods are also presented by means of computer simulations.
Keywords :
Rayleigh channels; channel estimation; code division multiple access; computational complexity; error statistics; interpolation; mean square error methods; multipath channels; spread spectrum communication; BER performance; DS-CDMA systems; Lagrange interpolation; RAKE combining systems; Rayleigh multipath channels; channel estimation methods; channel statistics; computational complexity; computer simulations; direct sequence code division multiple access; mean square error methods; multipath channel; Bit error rate; Channel estimation; Computational complexity; Interpolation; Lagrangian functions; Mean square error methods; Multiaccess communication; Multipath channels; Performance analysis; Statistics;
Conference_Titel :
OCEANS 2008
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4244-2619-5
Electronic_ISBN :
978-1-4244-2620-1
DOI :
10.1109/OCEANS.2008.5152109
