Development of a real-time adaptive equalizer for a high-rate underwater acoustic data communications link

17 December 2002

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

Vol. 1, I/307-I/312
https://doi.org/10.1109/oceans.1994.363860

Abstract

The paper describes the development of an adaptive equalizer based on the LMS algorithm through simulation results using real data acquired at Loch Duich, a sea loch on the west coast of Scotland, leading to the development of a hardware-implemented real-time adaptive equalizer. To reduce the demand on the equalizer to cancel long delay multipaths, it is combined with an existing adaptive beamformer. The adaptive beamformer, used on the receiver array, has an angular resolution of less than with the ability to adaptively position nulls at angles corresponding to multipath arrivals. This reduces the required tap-length of the equalizer speeding up processing and convergence properties.

Keywords

This publication has 7 references indexed in Scilit:

A fast self-optimized LMS algorithm for non-stationary identification: application to underwater equalization
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
A variable step size LMS algorithm
IEEE Transactions on Signal Processing, 1992
Acoustic burst transmission of high rate data through shallow underwater channels
Electronics Letters, 1992
Adaptive equalization techniques for acoustic telemetry channels
IEEE Journal of Oceanic Engineering, 1991
A variable step (VS) adaptive filter algorithm
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1986
Adaptive equalization
Proceedings of the IEEE, 1985
Adaptive equalization
IEEE Communications Magazine, 1982