Measurements of transmission properties of acoustic communication channels

• Autorzy: Kochańska I. , Lasota H.
• Języki publikacji: EN

Abstrakty

EN

Tough transmission properties of shallow water acoustic channels (SWAC) highly limit the use of underwater acoustic communication (UAC) systems. An adaptive matching of modulation and signaling schemes to instantaneous channel conditions is needed for reliable data communications. This creates, however, unique challenges for designers when compared to radio transmission systems. When communication system elements are in move, the accuracy of both the measurements of channel impulse responses and estimates of transmission characteristics is strongly limited, due to rapid variations of the channel performance. This paper describes communication tests of a model of the orthogonal frequency division multiplexing (OFDM) data transmission system. developed by the authors. The measurement procedures and signal processing algorithms were, first, tested in reverberant air-acoustic channels available in the laboratory, and, next, verified in natural conditions in a lake. The air acoustics trials prove to be effective and methodically correct.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2012
• Tom: Vol. 15
• Strony: 91--98
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Kochańska I.

autor

Lasota H.

• Gdansk University of Technology Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland,

Bibliografia

• [1] I. Kochańska, H. Lasota, Application of OFDM technique to underwater acoustic data transmission, Hydroacoustics, Vol. 14, 2011, pp. 91-98.
• [2] I. Kochańska, H. Lasota, Adaptive OFDM technique in underwater acoustic communications, (in Polish), Krajowe Sympozjum Telekomunikacji i Teleinformatyki, 2011.
• [3] H. Lasota, I. Kochańska, Transmission parameters of underwater communication channels, Hydroacoustics, Vol. 14, 2011, pp. 119-126.
• [4] I. Kochańska, H. Lasota, Investigation of underwater channel time-variability influence on the throughput of OFDM data transmission system, Submitted to ECUA 2012.
• [5] P. van Walree, Channel sounding for acoustic communications: techniques and shallowwater examples, FFI-rapport 2011/00007, April 2011.
• [6] P. A. Bello. Characterization of randomly time-variant linear channels, IEEE Trans., vol. CS-11, no. 4, 360-393, December 1963.
• [7] B. Sklar, Digital Communications: Fundamentals and Applications (2nd Edition), pp. 944-996, Prentice-Hall, 2001.