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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).
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
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=00881287
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.
