Design of an OFDM System with Long Frame by the Decision-Aided Channel Tracking Technique

Author

Lin, Ong-Sian ; Hong, Tze-Lun ; Chang, Dah-Chung

Author_Institution

Dept. of Commun. Eng., Nat. Central Univ., Jhongli

fYear

2006

fDate

7-10 May 2006

Firstpage

330

Lastpage

333

Abstract

An OFDM system with the decision-aided channel tracking technique for a long frame application is proposed. The OFDM system in wireless LAN applications assumes static channel response in a short frame and it is enough to use two long training symbols for channel estimation. We build a wireless surveillance system which may transmit data symbols in a seamless manner. The channel estimation with the symbol-by-symbol tracking is then required. We show that the proposed channel tracking method outperforms the channel estimation by only preamble in static and time-varying channels. The channel tracking module adds about 18% circuits to the whole system in our design

Keywords

OFDM modulation; channel estimation; wireless LAN; OFDM system; channel estimation; data symbols; decision-aided channel tracking; static channel response; static channels; symbol-by-symbol tracking; time-varying channels; wireless LAN; wireless surveillance system; Broadcast technology; Broadcasting; Channel estimation; Circuits; Communication standards; Discrete Fourier transforms; OFDM; Surveillance; Time-varying channels; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Electro/information Technology, 2006 IEEE International Conference on

Conference_Location

East Lansing, MI

Print_ISBN

0-7803-9592-1

Electronic_ISBN

0-7803-9593-X

Type

conf

DOI

10.1109/EIT.2006.252179

Filename

4017716