Proc. IEEE Asilomar
Conference on Signals, Systems and Computers,
November 7-10, 2010,
Pacific Grove, California USA.
Doppler estimation and correction for
shallow underwater acoustic communications
Karl F. Nieman,
Kenneth A. Perrine,
Keith H. Lent,
Terry L. Henderson,
Terry J. Brudner and
Brian L. Evans
Advanced Technology Laboratory,
Applied Research Laboratories,
The University of Texas at Austin,
Austin, TX 78712 USA
Draft of Paper -
Acoustic Communication Datasets
Companion papers were presented at
OCEANS 2010 and
Reliable mobile underwater acoustic communication
systems must compensate for strong, time-varying Doppler
effects. Many Doppler correction techniques rely on a single
bulk correction to compensate first-order effects. In many cases,
residual higher-order effects must be tracked and corrected using
other methods. The contributions of this paper are evaluations of
The evaluations use our publicly available shallow water
experimental dataset, which consists of 360 packet transmission
samples (each 0.5s long) from a five-channel receiver array.
- signal-to-noise ratio (SNR) performance from three Doppler
estimation and correction methods and
- communication performance of Doppler correction with
static vs. adaptive equalizers.
Questions During the Presentation
- Have you tried to use tapered
windows on the window data with overlap?
Response: We haven't yet. Using tapered windows, and
overlapping windows when there is more than one window, would
likely improve the calculation of bulk Doppler shift. Any small
error in the estimate of the bulk Doppler shift will be cleaned
up by the equalizer.
- Do the multipath components have different Doppler?
Matlab Code for the Receiver
We have received several requests to release the Matlab code
for the receiver.
At present, we have only released the data sets.
The receiver is a fairly straightforward single carrier receiver
in the paper plus a subsystem for Doppler estimation and correction.
The above slides give more information about the design and
implementation of the receiver.
We based the single-carrier receiver on the following book:
C. Richard Johnson, Jr., William A. Sethares, and Andy Klein,
Software Receiver Design, Cambridge University Press,
Oct. 2011, ISBN 978-0521189446, 480 pages. Paperback.
files associated with the book also work in Octave and are not copyrighted.
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