DOA tracking in time-varying underwater acoustic communication channels
DOA tracking in time-varying underwater acoustic communication channels
Underwater acoustic (UWA) communication channels are characterized by spreading of received signals in directions of arrival (DOAs). The DOAs often vary rapidly within small angular intervals, which are usually produced for the most part by moving ocean surface/internal waves and platforms. In this paper, the time-varying UWA communication channels are investigated. Based on the investigation, a beamforming technique that tracks DOAs is proposed, and used for UWA communications with guard-free orthogonal frequency-division multiplexing (OFDM) signal transmission. This beamforming is compared with a beamforming without DOA tracking, and the results show that the receiver with this beamforming outperforms that without DOA tracking. The comparison is based on data from a 14-element non-uniform vertical linear array in a simulation at a distance of 80 km, and in two sea trials at distances of 30 km and 105 km.
underwater acoustic communication, underwater acoustic propagation, underwater acoustics
1-9
Li, Jianghui
9c589194-00fa-4d42-abaf-53a32789cc5e
19 June 2017
Li, Jianghui
9c589194-00fa-4d42-abaf-53a32789cc5e
Li, Jianghui
(2017)
DOA tracking in time-varying underwater acoustic communication channels.
Oceans '17 MTS/IEEE Aberdeen, Aberdeen Exhibition and Conference Centre, Aberdeen, United Kingdom.
19 - 22 Jun 2017.
.
(doi:10.1109/OCEANSE.2017.8084563).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Underwater acoustic (UWA) communication channels are characterized by spreading of received signals in directions of arrival (DOAs). The DOAs often vary rapidly within small angular intervals, which are usually produced for the most part by moving ocean surface/internal waves and platforms. In this paper, the time-varying UWA communication channels are investigated. Based on the investigation, a beamforming technique that tracks DOAs is proposed, and used for UWA communications with guard-free orthogonal frequency-division multiplexing (OFDM) signal transmission. This beamforming is compared with a beamforming without DOA tracking, and the results show that the receiver with this beamforming outperforms that without DOA tracking. The comparison is based on data from a 14-element non-uniform vertical linear array in a simulation at a distance of 80 km, and in two sea trials at distances of 30 km and 105 km.
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More information
Accepted/In Press date: 1 April 2017
Published date: 19 June 2017
Venue - Dates:
Oceans '17 MTS/IEEE Aberdeen, Aberdeen Exhibition and Conference Centre, Aberdeen, United Kingdom, 2017-06-19 - 2017-06-22
Keywords:
underwater acoustic communication, underwater acoustic propagation, underwater acoustics
Identifiers
Local EPrints ID: 425102
URI: http://eprints.soton.ac.uk/id/eprint/425102
PURE UUID: ee25aa5f-5ef8-4714-9b20-a38d677d4ff8
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Date deposited: 10 Oct 2018 16:30
Last modified: 15 Mar 2024 22:01
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