Experimental demonstration of underwater acoustic communication using bionic signals |
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| Affiliation: | 1. Key Laboratory of Underwater Acoustic Communication and Marine Information Technology Ministry of Education, Xiamen University, Xiamen, China;2. National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing, Shanghai, China;1. Science and Technology of Underwater Acoustics Laboratory, Harbin Engineering University, 145th Nantong Street, Harbin 150001, PR China;2. School of Electrical, Electronic and Computer Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;3. Department of Electrical and Computer Engineering, University of Victoria, P.O. Box 3055, Victoria, B.C. V8W 3P6, Canada;1. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China;2. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China;3. College of Computer Science and Technology, Jilin University, Changchun 130000, China;1. Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Xiamen University, Ministry of Education, Xiamen, PR China;2. Department of Communications Engineering, School of Information Science and Technology, Xiamen University, Xiamen, PR China |
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| Abstract: | ![]()
This paper applies dolphin whistles to covert underwater acoustic (UWA) communication and proposes a UWA communication scheme based on M-ary bionic signal coding. At the transmitter end, the scheme maps multiple information bits into a dolphin whistle through a signal selector. At the receiver end, passive time reversal mirror (PTRM) is used for channel equalization and source information is restored according to the decision of which whistle is transmitted. The scheme has high spread spectrum gain. The anti multi-path performance is greatly improved when using PTRM. Different from traditional covert UWA communication methods, this mimicked signal is unlikely to alert an adversary even in high SNRs because of its real existence in marine environment. A tank experiment is conducted for the scheme, at communication rate of 50 bit/s with SNR −5 dB user information is recovered at a very low bit error rate. The results of tank experiment demonstrate the feasibility of this covert UWA communication scheme. |
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| Keywords: | Bionic underwater acoustic communication Dolphin whistles Passive time reversal mirror M-ary coding Covert performance |
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