DocumentCode :
2139460
Title :
A simple and efficient timing offset estimation for OFDM systems
Author :
Minn, H. ; Bhargava, V.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Volume :
1
fYear :
2000
fDate :
2000
Firstpage :
51
Abstract :
A simple timing offset estimation method for orthogonal frequency division multiplexing (OFDM) systems as a modification to Schmidl and Cox´s method (see IEEE Trans. on Comms., vol.45, no.12, p.1613-21, 1997) is presented. By designing the training symbol, the timing metric plateau inherent of Schmidl et al. is eliminated and hence the performance is improved. The performances of the proposed method and of Schmidl et al. are evaluated by computer simulation in terms of the estimator variance. The timing offset estimator of Landstrom, Wilson, van de Beek, Odling and Borjesson (see Proc. Intl. Conf. on Communications, Vancouver, BC, Canada, p.500-5, 1999) is also included in the performance comparison as another reference. The simulation results show that the proposed method achieves significantly smaller estimator variance. Using more samples in calculation of the half symbol energy required in the timing metric is shown to give more robustness against a dispersive channel
Keywords :
AWGN channels; OFDM modulation; dispersive channels; intersymbol interference; parameter estimation; synchronisation; timing; AWGN channel; ISI channel; OFDM systems; computer simulation; dispersive channel; efficient timing offset estimation; estimator variance; half symbol energy; orthogonal frequency division multiplexing; performance; performance comparison; simulation results; synchronisation; timing metric; training symbol; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Intersymbol interference; Modulation; OFDM; Performance evaluation; Robustness; Timing; Wireless LAN;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
ISSN :
1090-3038
Print_ISBN :
0-7803-5718-3
Type :
conf
DOI :
10.1109/VETECS.2000.851416
Filename :
851416
Link To Document :
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