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Diversity-based acoustic communication with a glider in deep water
H C Song1, Bruce M Howe2, Michael G Brown3
1Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0238.
The Journal of the Acoustical Society of America
|March 11, 2014
Summary
Underwater gliders can serve as mobile communication gateways. By combining multiple acoustic signal receptions, this study demonstrates their feasibility for relaying data over long distances in the deep ocean.
Area of Science:
- Oceanography
- Acoustic communication
- Robotics
Background:
- Underwater gliders are primarily used for collecting and relaying oceanographic data.
- Current data relay methods rely on periodic surface transmissions via satellite.
- Exploring alternative mobile data relay platforms is crucial for enhanced ocean monitoring.
Purpose of the Study:
- To investigate the feasibility of using an underwater glider as a mobile acoustic communication gateway.
- To assess the effectiveness of diversity combining for improving signal reception by the glider.
- To demonstrate long-range acoustic data transmission to a mobile platform in deep water.
Main Methods:
- Deployed a Seaglider equipped with an acoustic recording system off Kauai, Hawaii.
- Utilized a broadband acoustic source (75 Hz m-sequence) deployed on the seafloor.
- Collected transmissions while the glider moved up to 200 km from the source and dived to 1000 m.
- Applied diversity combining techniques to multiple received signal instances.
Main Results:
- Successfully received transmissions from the acoustic source over extended ranges (up to ~200 km).
- Demonstrated that the m-sequence signal, treated as binary-phase shift-keying, could be received.
- Showcased the effectiveness of diversity combining in enhancing signal reception by the glider.
Conclusions:
- Underwater gliders can function as mobile communication gateways, expanding data relay capabilities.
- The study validates the use of acoustic communication for long-range data transfer to gliders.
- This approach offers a promising method for real-time data acquisition in remote ocean regions.
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