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Time reversal acoustic communication for multiband transmission.
1College of Earth, Ocean, and Environment, University of Delaware, 114 Robinson Hall, Newark, Delaware 19716, USA. ajsong@udel.edu
The Journal of the Acoustical Society of America
|April 17, 2012
Summary
Multiband acoustic communication divides a wide frequency band into sub-bands for enhanced data transmission. This method achieved a 32 k bits/s data rate over 3 km in a shallow water experiment.
Area of Science:
- Underwater acoustics
- Wireless communication
Background:
- Acoustic communication systems face challenges with limited bandwidth and inter-symbol interference.
- Efficient data transmission in shallow water environments requires advanced signal processing techniques.
Purpose of the Study:
- To propose and demonstrate a multiband acoustic communication scheme for increased data rates.
- To utilize time reversal decision feedback equalizers for mitigating inter-symbol interference in acoustic channels.
Main Methods:
- Dividing a wide frequency band (10-32 kHz) into multiple separated sub-bands.
- Employing time reversal decision feedback equalizers for inter-symbol interference compensation within each sub-band.
- Conducting a shallow water acoustic experiment in Kauai, Hawaii.
Main Results:
- Achieved a data rate of 32 k bits/s.
- Successfully transmitted data over a 3 km communication range.
- Utilized quadrature phase-shift keying signaling across four sub-bands.
Conclusions:
- Multiband acoustic communication is a viable strategy for achieving higher data rates in underwater environments.
- Time reversal decision feedback equalizers effectively address inter-symbol interference in shallow water acoustic channels.
- The experimental demonstration validates the proposed communication scheme's performance.
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