Convergence Property of Time Reversal Waves under Noisy Environment
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概要
- 論文の詳細を見る
We have studied on the convergence property of time reversal waves (which are equal to phase conjugate waves) in the ocean, particularly in time domain with various configurations of time reversal array (TRA) through simulations and tank experiments. In this paper, the property of time reversal waves under noisy environment is discussed. Simulations were carried out with various sound velocity profiles using the Pekeris solution of the normal mode method and the parabolic equation (PE) method, and tank experiments were also conducted to compare with the simulation results. Results revealed the following. Time reversal waves even at very low signal noise to ratio (SNR) can converge and send the desired signal to the focus at high SNR. The focusing effect of time reversal waves is higher when the horizontal range is extended. If the sound velocity profile is different, the focusing effects are not considerably affected.
- 2004-05-15
著者
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Ochi Hiroshi
Marine Technology Department Japan Marine Science And Technology Center (jamstec)
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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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Shimura Takuya
Marine Technology Department, Japan Marine Science and Technology Center (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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