Basic Research on Time-Reversal Waves in Deep Ocean for Long Acoustic Communication
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概要
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We have studied the focusing property of time-reversal waves and its application to acoustic communication in shallow water. In this study, this focusing property in the deep ocean and its application to long horizontal acoustic communication are discussed. The results are as follows. Even if a time-reversal array (TRA) does not expand from the sea surface to the seabed, time-reversal signals converge, and the focusing property is not significantly affected by the depths of the focus and TRA. Then, it is revealed that by using time reversal, it is possible to enssure communication channel over a long range, through the simulation. In phase modulation, time reversal can demodulate almost only by itself, while in amplitude and phase modulation, an adaptive filter to compensates further.
- 2005-06-15
著者
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Watanabe Yoshitaka
Marine Technology Research and Development Program, Marine Technology Center, Japan Agency for Marin
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Ochi Hiroshi
Marine Technology Department Japan Marine Science And Technology Center (jamstec)
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Shimura Takuya
Marine Technology Research and Development Program, Marine Technology Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Natsushima-cho 2-15, Yokosuka 237-0061, Japan
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Shimura Takuya
Marine Technology Center, Japan Agency for Marine–Earth Science and Technology, Yokosuka, Kanagawa 237-0061, Japan
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Ochi Hiroshi
Marine Technology Research and Development Program, Marine Technology Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Natsushima-cho 2-15, Yokosuka 237-0061, Japan
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Ochi Hiroshi
Marine Technology Center, Japan Agency for Marine–Earth Science and Technology, Yokosuka, Kanagawa 237-0061, Japan
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Watanabe Yoshitaka
Marine Technology Center, Japan Agency for Marine–Earth Science and Technology, Yokosuka, Kanagawa 237-0061, Japan
関連論文
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