Efficient use of space-time clustering for underwater acoustic communications
Efficient use of space-time clustering for underwater acoustic communications
Underwater acoustical communication channels are characterized by the spreading of received signals in space (direction of arrival) and in time (delay). The spread is often limited to a small number of space-time clusters. In this paper, the space-time clustering is exploited in a proposed receiver designed for guard-free orthogonal frequency-division multiplexing with superimposed data and pilot signals. For separation of space clusters, the receiver utilizes a vertical linear array (VLA) of hydrophones, whereas for combining delay-spread signals within a space cluster, a time-domain equalizer is used. We compare a number of space-time processing techniques, including a proposed reduced-complexity spatial filter, and show that techniques exploiting the space-time clustering demonstrate an improved detection performance. The comparison is done using signals transmitted by a moving transducer, and recorded on a 14-element nonuniform VLA in sea trials at distances of 46 and 105 km.
underwater acoustic communication, direction-of-arrival (DOA)
173-183
Li, Jianghui
9c589194-00fa-4d42-abaf-53a32789cc5e
Zakharov, Yuriy
2abf7642-edba-4f15-8b98-4caca66510f6
January 2018
Li, Jianghui
9c589194-00fa-4d42-abaf-53a32789cc5e
Zakharov, Yuriy
2abf7642-edba-4f15-8b98-4caca66510f6
Li, Jianghui and Zakharov, Yuriy
(2018)
Efficient use of space-time clustering for underwater acoustic communications.
IEEE Journal of Oceanic Engineering, 43 (1), .
(doi:10.1109/JOE.2017.2688558).
Abstract
Underwater acoustical communication channels are characterized by the spreading of received signals in space (direction of arrival) and in time (delay). The spread is often limited to a small number of space-time clusters. In this paper, the space-time clustering is exploited in a proposed receiver designed for guard-free orthogonal frequency-division multiplexing with superimposed data and pilot signals. For separation of space clusters, the receiver utilizes a vertical linear array (VLA) of hydrophones, whereas for combining delay-spread signals within a space cluster, a time-domain equalizer is used. We compare a number of space-time processing techniques, including a proposed reduced-complexity spatial filter, and show that techniques exploiting the space-time clustering demonstrate an improved detection performance. The comparison is done using signals transmitted by a moving transducer, and recorded on a 14-element nonuniform VLA in sea trials at distances of 46 and 105 km.
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Accepted/In Press date: 12 March 2017
e-pub ahead of print date: 13 April 2017
Published date: January 2018
Keywords:
underwater acoustic communication, direction-of-arrival (DOA)
Identifiers
Local EPrints ID: 425318
URI: http://eprints.soton.ac.uk/id/eprint/425318
ISSN: 0364-9059
PURE UUID: a8692480-e55b-4c47-90bd-ac7b5057aeae
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Date deposited: 12 Oct 2018 16:30
Last modified: 15 Mar 2024 22:01
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Author:
Yuriy Zakharov
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