A Convergence Study of Iterative Channel Estimation Algorithms for OFDM Systems in Dispersive Time-Varying Channels

Author

Du, Zheng ; Song, Xuegui ; Cheng, Julian ; Beaulieu, Norman C.

fYear

2009

fDate

5-8 April 2009

Firstpage

1

Lastpage

6

Abstract

Maximum-likelihood based channel estimation is considered for orthogonal frequency division multiplexing systems in dispersive time-varying channels. A successive overrelaxation approach is adopted to analyze the convergence rate of an iterative channel estimation algorithm. Based on the analysis, an improved fast converging iterative channel estimation algorithm is proposed. Numerical tests are performed to show the improvement of the proposed algorithm over a recently proposed channel estimation algorithm.

Keywords

OFDM modulation; channel estimation; convergence of numerical methods; dispersive channels; iterative methods; maximum likelihood estimation; time-varying channels; OFDM system; convergence rate; dispersive time-varying channel; iterative channel estimation algorithm; orthogonal frequency division multiplexing system; overrelaxation approach; Algorithm design and analysis; Channel estimation; Convergence; Dispersion; Iterative algorithms; Iterative methods; Maximum likelihood estimation; OFDM; Testing; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE

Conference_Location

Budapest

ISSN

1525-3511

Print_ISBN

978-1-4244-2947-9

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2009.4917493

Filename

4917493