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Experimental Demonstration of Long-Range Underwater Acoustic Communication Using a Vertical Sensor Array.

Anbang Zhao^1,2,3, Caigao Zeng^4,5, Juan Hui^6,7

¹Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China. zhaoanbang@hrbeu.edu.cn.

Sensors (Basel, Switzerland)

|June 28, 2017

Summary

A new Composite Channel Virtual Time Reversal Mirror (CCVTRM) improves long-range underwater acoustic communication. This method enhances signal processing for vertical sensor arrays, reducing errors in shallow water environments.

Keywords:

composite channel long-range UWA communication shallow water vertical sensor array virtual time reversal mirror

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Area of Science:

Underwater Acoustics
Signal Processing
Wireless Communication

Background:

Traditional passive time reversal mirrors struggle with weak signal-to-noise ratios in long-range underwater acoustic communication.
Accurate channel impulse response estimation for each sensor in a vertical sensor array is challenging due to low SNR.
This limits the performance of existing methods in shallow water environments.

Purpose of the Study:

To propose and evaluate a Composite Channel Virtual Time Reversal Mirror (CCVTRM) for vertical sensor array processing.
To enhance long-range underwater acoustic communication performance in shallow water.
To mitigate inter-symbol interference and reduce bit error rates.

Main Methods:

Development of the CCVTRM technique for vertical sensor array processing.
Estimation of the composite channel of the vertical sensor array, rather than individual channels.
Implementation and testing of CCVTRM in a real-world underwater acoustic communication experiment.

Main Results:

CCVTRM effectively mitigates inter-symbol interference and reduces bit error rate (BER).
The CCVTRM method requires simpler calculations compared to traditional passive time reversal mirrors.
An 80 km underwater acoustic communication experiment achieved a low BER at 66.7 bit/s using a 12-sensor vertical sensor array.

Conclusions:

CCVTRM is a feasible and effective technique for long-range underwater acoustic communication in shallow water.
The proposed method offers a simpler and more robust alternative to traditional passive time reversal mirrors.
The experimental results validate the practical application of CCVTRM for enhancing underwater communication systems.