Turbo channel estimation for OFDM systems on highly time and frequency selective channels

Author

Affrot, Emmanuel J. ; Siala, Mohamed

Author_Institution

France Telecom, France

Volume

5

fYear

2000

fDate

2000

Firstpage

2977

Abstract

We propose an optimum turbo channel estimation algorithm for OFDM systems on highly selective fading channels. This algorithm performs an iterative estimation of the multiplicative fading channel according to the maximum a posteriori criterion. It requires a convenient representation of the highly time and frequency selective fading channel based on the Karhunen-Loeve expansion theorem. It also optimally takes into account the coded structure of the data symbols in the estimation process thanks to the Bahl (1974) algorithm

Keywords

OFDM modulation; diversity reception; fading channels; iterative methods; multipath channels; optimisation; parameter estimation; BER; Bahl algorithm; EM algorithm; Karhunen-Loeve expansion theorem; OFDM systems; channel representation; coded structure; data symbols; expectation-maximization algorithm; frequency selective channels; iterative estimation; iterative receiver; matched filter; maximum a posteriori criterion; multipath fading channel; multiplicative fading channel; optimum turbo channel estimation algorithm; spatial diversity; time selective channels; Channel estimation; Decorrelation; Fading; Frequency estimation; Iterative algorithms; OFDM; Phase shift keying; Scattering; System performance; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1520-6149

Print_ISBN

0-7803-6293-4

Type

conf

DOI

10.1109/ICASSP.2000.861159

Filename

861159