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Sound Waves: Interference00:53

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Time reversal multiple-input/multiple-output acoustic communication enhanced by parallel interference cancellation.

Aijun Song1, Mohsen Badiey

  • 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
|January 28, 2012
PubMed
Summary
This summary is machine-generated.

This study enhances underwater acoustic communication using multiple-input/multiple-output (MIMO) techniques. A novel receiver design with interference cancellation significantly improves signal quality in high-frequency channels.

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Area of Science:

  • Underwater Acoustics
  • Signal Processing
  • Communication Engineering

Background:

  • Underwater acoustic communication faces challenges due to time-varying channels and interference.
  • Multiple-input/multiple-output (MIMO) systems offer potential for improved data rates and reliability.

Purpose of the Study:

  • To develop and evaluate advanced receivers for high-frequency underwater MIMO acoustic channels.
  • To improve the performance of underwater acoustic communication systems through interference mitigation.

Main Methods:

  • Utilized time reversal processing combined with a decision feedback equalizer for inter-symbol interference compensation.
  • Incorporated a parallel interference cancellation method to suppress co-channel interference.
  • Conducted a 35-hour shallow water experiment with high-frequency MIMO transmissions.

Main Results:

  • The developed receiver demonstrated significant performance enhancement, achieving an average 2-4 dB increase in output signal-to-noise ratio per data stream.
  • Interference cancellation proved effective in improving signal quality throughout the experiment.
  • Observed significant variations in communication performance and data rates due to water column stratification.

Conclusions:

  • The proposed time reversal-based MIMO receiver with interference cancellation is effective for high-frequency underwater acoustic communication.
  • Environmental factors like water stratification significantly impact underwater communication system performance.
  • The developed techniques show promise for robust and high-rate underwater data transmission.