Comparison of Channel Estimation Methods for Pilot Aided OFDM Systems

Author

Henkel, Martin ; Schilling, Christoph ; Schroer, Wolfgang

Author_Institution

Institut fur Angewandte Forschung, Appl. Sci. Univ., Ulm

fYear

2007

fDate

22-25 April 2007

Firstpage

1435

Lastpage

1439

Abstract

This paper investigates different channel estimation methods for pilot based OFDM transmission systems. Based on a regular grid of pilot data the channel estimation is separated for time and frequency direction. For time direction linear and spline interpolation are used. In frequency direction also linear and spline interpolation are compared. In addition an estimation based on a DFT method is taken into account. Also the Wiener estimation approach is investigated both for interpolation in time and frequency direction. The methods are compared with respect to performance and implementation complexity. For simulation a DRM (digital radio mondiale) system is used.

Keywords

OFDM modulation; channel estimation; digital radio; discrete Fourier transforms; interpolation; DFT method; Wiener estimation approach; channel estimation methods; digital radio mondiale system; linear interpolation; pilot aided OFDM systems; spline interpolation; AWGN; Channel estimation; Delay estimation; Demodulation; Doppler shift; Frequency estimation; Interpolation; OFDM; Rayleigh scattering; Spline;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th

Conference_Location

Dublin

ISSN

1550-2252

Print_ISBN

1-4244-0266-2

Type

conf

DOI

10.1109/VETECS.2007.300

Filename

4212728