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Closed loop Doppler tracking and compensation for non-stationary underwater platforms

Lookup NU author(s): Professor Bayan Sharif, Professor Jeffrey Neasham, Emeritus Professor Oliver Hinton, Alan Adams


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A new Doppler estimation and compensation scheme is presented to enable robust communications between non-stationary underwater platforms such as autonomous underwater vehicles (AUV). The underwater acoustic channel is affected by Doppler shift induced by vehicle movement and time varying multipath propagation. To this end, this paper proposes a Doppler tracking method that is adapted within a wideband beamforming array with decision feedback equalisation. Doppler compensation is achieved by multirate sampling and linear interpolation. This approach ensures that both multipath and Doppler effects are mitigated simultaneously. Simulation and experimental results are presented to show the performance gain achieved for a range of platform velocity and acceleration levels. The proposed approach is capable of robust communications with typical bit error rates of ~1/1000 at vehicle speeds of ~2.6 m/s. The paper also compares experimental performance with an open loop Doppler block processing approach. (5 References).

Publication metadata

Author(s): Adams AE; Hinton OR; Sharif BS; Neasham J

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Oceans 2000 MTS/IEEE Conference and Exhibition. Conference Proceedings

Year of Conference: 2000

Pages: 371-375

ISSN: 7803-6551

Publisher: Institution of Electronic and Electrical Engineers


DOI: 10.1109/OCEANS.2000.881287

Notes: 1. Piscataway, NJ, USA. OCEANS 2000 MTS/IEEE Conference and Exhibition. Conference Proceedings. Providence, RI, USA. 11-14 Sept. 2000.