Design considerations for shallow water acoustic communication systems

• Autorzy: Yoon Y. , Zielinski A.
• Konferencja: Proceedings of the 2 nd EAA International Symposium on Hydroacoustics 24-27 May 1999, Gdańsk-Jurata POLAND
• Języki publikacji: EN

Abstrakty

EN

Relevant characteristics of the underwater channel used for acoustic communications are briefly described. There is a trade-off between achievable transmission range and data throughput. Transmission range of several kilometers with carrier frequency of 50kHz and several tens of kilometers with frequency less than 10 kHz might be possible using only 75 watts of acoustic power. Also, we investigated the required acoustic power for certain transmission ranges at given signal-to-noise ratio (SNR) values and the effect of wind speed. A shallow water channel model is proposed to study signal attenuation and arriving angles of the multipath. As the signal time delay increases, the arriving angle of the reflected signals becomes larger, allowing us to limit the number of multipath signals using a directional receiver. We will see that using directional receiver is better suited for a channel with a small range-to-depth ratio (RDR) and that equalization methods are better suited for a channel with a large RDR. Finally hardware complexity for designing shallow water acoustic communication systems is studied using a currently available digital signal processing (DSP) technology.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1999
• Tom: Vol. 2
• Strony: 179--184
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Yoon Y.

• Department of Electrical and Computer Engineering University of Victoria, Victoria, B.C. V8W 3P6, Canada

autor

Zielinski A.

• Department of Electrical and Computer Engineering University of Victoria, Victoria, B.C. V8W 3P6, Canada

Bibliografia

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• [6] O. Porta, Underwater Acoustic Communications, Sea Technology, pp.49-55, (1998).
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• [8] R.I. Urick, Principies of Underwater Sound, 1st edition, McGraw-Hill Book Co., 1975, pp. 70-74.
• [9] M Johnson, D. Brady, and M. Grond, Reducing the Computational Requirements of Adaptive Equalization in Underwater Acoustic Communications, Proc. of Oceans 95, pp. 1405-1410, (1995).
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• [11] A. Zielinski, Y. Yoon and L. Wu, Performance Analysis of Digital Acoustic Commnnication in a Shallow Watec Channel, IEEE J. of Oceanic Engineering, Vol. 20, No. 4, pp. 293-299, (1995).