Current Flow-Induced Effect on Time-Reversal Communication
スポンサーリンク
概要
- 論文の詳細を見る
We previously studied long horizontal time-reversal (phase-conjugate) communication based on simulations and at-sea experiments. In these previous experiments, time-reversal communication at ranges of 10 to 100 km was achieved. In the implementation of time-reversal communication, it is prerequisite that the reciprocity of the medium is retained. Therefore, it is necessary to investigate the effects of nonreciprocal disturbances, such as movements of source-receiver or current flow. The effect of the movement of source receiver was studied in previous works. In this paper, the effect of current flow is studied on the basis of simulations. The results show that the effects of current flow appear mainly as stationary phase deviation. The method of combining time reversal and adaptive equalization, which we have proposed in our previous works, can compensate the current flow-induced effect and enable communication if the current flow speed is not so high.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2009-07-25
著者
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Ochi Hiroshi
Advanced Marine Technology Research Program, Marine Technology Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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Watanabe Yoshitaka
Advanced Marine Technology Research Program, Marine Technology Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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Hattori Takehito
Nippon Marine Enterprise, Ltd., 14-1 Ogawa-cho, Yokosuka, Kanagawa 238-0004, Japan
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Shimura Takuya
Advanced Marine Technology Program, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan
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Ochi Hiroshi
Advanced Technology Research Program, Marine Technology Center, Japan Agency for Marine–Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
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Watanabe Yoshitaka
Advanced Marine Technology Program, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan
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Ochi Hiroshi
Advanced Marine Technology Program, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan
関連論文
- Experiment Results of Time-Reversal Communication at the Range of 300 km
- Measurement of Absorption Loss at 80 kHz Band for Wideband Underwater Acoustic Communication
- Demonstration of time-reversal communication combined with spread spectrum at the range of 900 km in deep ocean
- Current Flow-Induced Effect on Time-Reversal Communication
- First Experiment Result of Time-Reversal Communication in Deep Ocean
- Time-Reversal Communication in Deep Ocean: Result of Second At-Sea Experiment