Added pilot semi-blind channel estimation scheme for OFDM in fading channels

Author

Ho, C.K. ; Farhang-Boroujeny, B. ; Chin, F.

Author_Institution

Centre for Wireless Commun., Singapore, Singapore

Volume

5

fYear

2001

fDate

2001

Firstpage

3075

Abstract

An added pilot semi-blind (APSB) scheme used for channel identification of OFDM systems, which have been adopted for DAB and DVB-T, is proposed. This scheme uses pilot symbols that are added directly to the data symbols and hence does not require any additional bandwidth for its implementation. To remove the pilots, a two dimensional Wiener filter is used for the purpose of channel interpolation by using successive iterations. Although its complexity increases with additional iterations, the APSB scheme is found to compare favorably to existing blind schemes proposed for the OFDM system in terms of bit error rate and convergence

Keywords

OFDM modulation; Wiener filters; convergence of numerical methods; digital audio broadcasting; digital video broadcasting; error statistics; fading channels; identification; interpolation; iterative methods; OFDM; added pilot semi-blind scheme; bit error rate; channel estimation; channel identification; channel interpolation; convergence; fading channels; orthogonal frequency division multiplexing; pilot symbols; successive iterations; two dimensional Wiener filter; Bandwidth; Channel estimation; Delay; Digital video broadcasting; Fading; Frequency domain analysis; Interpolation; OFDM; Transmitters; Wiener filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE

Conference_Location

San Antonio, TX

Print_ISBN

0-7803-7206-9

Type

conf

DOI

10.1109/GLOCOM.2001.965992

Filename

965992