An EM-MAP-Block Algorithm for Semi-Blind Channel Estimation

Author

Touati, Sami

Author_Institution

Inst. Gaspard Monge, Univ. de Marne-la-Vallee, Marne La Vallee

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

In this paper, we propose a semi-blind MAP (maximum "a posteriori") channel estimation method based on an expectation-maximization block algorithm (EM-MAP-block). In the OFDM communication context, our algorithm still have a linear arithmetical complexity. However, it yields to an SNR improvement going up to 3.5 dB compared to classical training sequences based channel estimation method in the context of 5 GHz OFDM WLANs. The new algorithm performs better than already existing recursive algorithms and block algorithms

Keywords

OFDM modulation; channel estimation; computational complexity; expectation-maximisation algorithm; maximum likelihood estimation; wireless LAN; 5 GHz; EM-MAP-block algorithm; OFDM WLAN; OFDM communication; expectation-maximization block; linear arithmetical complexity; maximum a posteriori channel estimation; semi-blind channel estimation; Channel estimation; Context; Convolution; Demodulation; Doppler effect; Frequency domain analysis; Interference; Narrowband; OFDM; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1661009

Filename

1661009