Performance evaluation of a data-derived iterative channel estimator for a COFDM system with receive diversity

Author

Dowler, Alex ; Nix, Andrew

Author_Institution

Centre for Commun. Res., Bristol Univ., UK

Volume

2

fYear

2003

fDate

6-9 Oct. 2003

Firstpage

1224

Abstract

A low-complexity data-derived iterative channel estimator is evaluated in a receive diversity system for two and four receive antennas. The performance is shown almost to match the ideal (perfect channel knowledge) case in a low-Doppler environment. At higher Doppler frequencies, performance is still good, but deviates from the ideal case. A Wiener filter tracking algorithm is proposed that is advantageous at lower E_b/N₀ ranges, however linear tracking is found to be better at higher E_b/N₀ ratios and therefore further improves performance for higher order modulation schemes such as 16-QAM.

Keywords

Doppler effect; OFDM modulation; Wiener filters; channel estimation; diversity reception; iterative methods; receiving antennas; tracking filters; COFDM system; E_b/N₀; QAM; Wiener filter tracking algorithm; data-derived channel estimator; diversity reception; higher order modulation schemes; iterative channel estimator; perfect channel knowledge; receive antennas; receive diversity; tracking filter; Channel estimation; Decoding; Diversity reception; Equations; MIMO; Receiving antennas; Transmitting antennas; Wide area networks; Wideband; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th

ISSN

1090-3038

Print_ISBN

0-7803-7954-3

Type

conf

DOI

10.1109/VETECF.2003.1285217

Filename

1285217