NDLI: Blind resampling parameter estimation for doubly selective underwater acoustic channels (Invited Paper)

Content Provider	IEEE Xplore Digital Library
Author	Yerramalli, S. Mitra, U.
Copyright Year	2010
Description	Author affiliation: University of Southern California (Yerramalli, S.; Mitra, U.)
Abstract	Underwater acoustic channels are well modeled by different Doppler scaling per path, a generalization of the commonly employed model with equal Doppler scaling on all paths. The path dependent Doppler shifts and wideband channel, destroy carrier orthogonality and yield severe inter-carrier interference in an Orthogonal Frequency Division Multiplexing system. Resampling is typical front-end processing for signals over a common Doppler shift channel and this work examines the choice of resampling factor for the distinct Doppler per path scenario. Two criteria are derived to evaluate the optimal resampling parameter, one using sufficient statistics and the second using a matched filtering interpretation of resampling. The filtering interpretation is then used to derive a blind estimator for the optimal resampling parameter. Simulation results show the for small to moderate Doppler spreads, the blind estimator significantly outperforms the classical packet length based Doppler scaling estimator in many operating regimes.
Starting Page	809
Ending Page	812
File Size	181487
Page Count	4
File Format	PDF
ISBN	9781424453085
DOI	10.1109/ISCAS.2010.5537443
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-30
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Parameter estimation Underwater acoustics Doppler shift Filtering Wideband Interference OFDM Signal processing Statistics Matched filters
Content Type	Text
Resource Type	Article

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