DocumentCode :
2518933
Title :
Analysis of channel estimation error for OFDM reception over severely time-dispersive channels
Author :
Hurnanen, Tero ; Poikonen, Jussi
Author_Institution :
Dept. of Inf. Technol., Univ. of Turku, Turku, Finland
fYear :
2010
fDate :
26-28 April 2010
Firstpage :
1315
Lastpage :
1319
Abstract :
The accuracy of equalization in the demodulation of orthogonal frequency division multiplexing signals is directly dependent on the density of pilot carriers in the signal and the delay dispersion of the propagation channel. In this paper, the error introduced by an insufficient pilot density with respect to the channel delay dispersion is theoretically analyzed. An expression is derived for the average channel estimation error given an OFDM pilot density and channel power delay profile. Based on this expression, the effect of channel estimation error on the perceived signal-to-noise ratio in the receiver demodulation is approximated. Results of the theoretical analysis and approximation are compared to simulations of OFDM transmitted over time-dispersive channels.
Keywords :
OFDM modulation; channel estimation; OFDM pilot density; OFDM reception; average channel estimation error; channel delay dispersion; channel power delay profile; orthogonal frequency division multiplexing signals; propagation channel; receiver demodulation; severely time-dispersive channels; Channel estimation; Delay estimation; Demodulation; Digital video broadcasting; Dispersion; Frequency domain analysis; Interference; OFDM; Propagation delay; Signal design;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
MELECON 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference
Conference_Location :
Valletta
Print_ISBN :
978-1-4244-5793-9
Type :
conf
DOI :
10.1109/MELCON.2010.5475969
Filename :
5475969
Link To Document :
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