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A computationally efficient Doppler compensation system for underwater acoustic communications

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4 Author(s)
Sharif, B.S. ; Dept. of Electr. & Electron. Eng., Newcastle upon Tyne Univ., UK ; Neasham, J. ; Hinton, O.R. ; Adams, A.E.

A Doppler compensation system is presented which is suitable for high-data-rate acoustic communication between rapidly moving platforms such as autonomous underwater vehicles. The proposed approach provides a generic preprocessor to conventional adaptive receiver structures with only a marginal increase in computational load and hardware cost. The preprocessor employs a novel Doppler estimation technique and efficient sample rate conversion to remove Doppler shift induced by platform velocity and acceleration. Performance predicted by simulation is compared to that of sea trials of a prototype communication system in the North Sea. Successful communication is demonstrated at 16 kbit/s with a transmitting platform moving at up to /spl plusmn/2.6 m/s.

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:25 ,  Issue: 1 )