Title :
Adaptive Doppler compensation for coherent acoustic communication
Author :
Sharif, B.S. ; Neasham, J. ; Hinton, O.R. ; Adams, A.E. ; Davies, J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Newcastle upon Tyne Univ., UK
fDate :
10/1/2000 12:00:00 AM
Abstract :
Doppler shift tracking and compensation based on block and adaptive estimation methods are presented. These methods enable robust high data-rate acoustic communication between moving platforms such as autonomous underwater vehicles. The proposed schemes are incorporated within a wideband beamforming array with decision feedback equalisation. The block-based Doppler compensator is used as a pre-processor to the beamforming structure, whereas the adaptive compensator and the beamforming structure are jointly updated. The two methods employ multirate sampling and linear interpolation to compensate for the Doppler shift. Simulation and experimental sea-trial results are reported for both block and adaptive methods, which demonstrate successful communication at 16 kbit/s with a transmitting platform moving at up to ±2.6 m/s
Keywords :
Doppler shift; adaptive estimation; adaptive signal processing; array signal processing; compensation; decision feedback equalisers; interpolation; mobile communication; signal sampling; underwater acoustic communication; underwater vehicles; Doppler shift tracking; adaptive Doppler compensation; adaptive compensator; adaptive estimation methods; autonomous underwater vehicles; beamforming structure; block estimation method; block-based Doppler compensator; coherent acoustic communication; decision feedback equalisation; linear interpolation; moving platforms; multirate sampling; robust high data-rate acoustic communication; sea-trial results; transmitting platform; wideband beamforming array;
Journal_Title :
Radar, Sonar and Navigation, IEE Proceedings -
DOI :
10.1049/ip-rsn:20000665
