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第26届中国控制与决策会议

作者： XU Yaosong Wang Dandan Fu Hua Faculty of Electrical and Control Engineering Liaoning Technical University

ISBN: (纸本)9781479937097

Multipath propagation and reverberation of underwater acoustic signal affect the accuracy of localization estimation based on time difference of arrival（TDOA）. To solve the problem, a novel algorithm is proposed to improve the accuracy of localization estimation of underwater acoustic source. Based on the signals received at an array of sensors, a general framework for acoustic source localization using particle ltering is proposed. A generic particle ltering framework was derived. The simulation results demonstrate the superiority of the proposed method. The resulting particle lter is shown to outperform traditional acoustic source localization method.

关键词： underwater acoustic Localization Multipath Propagation Reverberation Time Difference of Arrival(TDOA) Particle Filter

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acoustic MIMO Communications in a Very Shallow Water Channel

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Journal of Marine Science and Application 2015年第4期14卷 434-439页

作者： Yuehai Zhou Xiuling Cao Feng Tong Key Laboratory of underwater acoustic Communication and Marine Information Technology of the Minister of Education Xiamen University Xiamen 361005 China

underwater acoustic channels pose a great difficulty for the development of high speed communication due to highly limited band-width as well as hostile multipath interference. Enlightened by rapid progress of multiple-input multiple-output （MIMO） technologies in wireless communication scenarios, MIMO systems offer a potential solution by enabling multiple spatially parallel communication channels to improve communication performance as well as capacity. For MIMO acoustic communications, deep sea channels offer substantial spatial diversity among multiple channels that can be exploited to address simultaneous multipath and co-channel interference. At the same time, there are increasing requirements for high speed underwater communication in very shallow water area （for example, a depth less than 10 m）. In this paper, a space-time multichannel adaptive receiver consisting of multiple decision feedback equalizers （DFE） is adopted as the receiver for a very shallow water MIMO acoustic communication system. The performance of multichannel DFE receivers with relatively small number of receiving elements are analyzed and compared with that of the multichannel time reversal receiver to evaluate the impact of limited spatial diversity on multi-channel equalization and time reversal processing. The results of sea trials in a very shallow water channel are presented to demonstrate the feasibility of very shallow water MIMO acoustic communication.

关键词： underwater acoustic underwater acoustic communication multiple-input multiple-output (MIMO) decision feedback equalizer (DFE) very shallow water multi-channel time reversal

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A Time Synchronization Method for underwater Wireless Sensor Networks

A Time Synchronization Method for Underwater Wireless Sensor...

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2009中国控制与决策会议

作者： Chao Lu,Shuo Wang,Min Tan The Key Laboratory of Complex Systems and Intelligence Science Institute of Automation,Chinese Academy of Sciences,Beijing,China,100190

＜正＞In this paper,a time synchronization method for underwater Wireless Sensor Networks（UWSN）,UA-TSP,is *** proposed method not only compensates the main time delay in acoustic communication,but also decreases the cumulate errors in the multi-hop scene through an loop convergence *** implementation of UA-TSP is combined with the nodes discovering process,and less control frame is *** simulations and experiments results show that the method can reach a satisfactory tradeoff among the time synchronization precision, communication efficiency and power consumption.

关键词： Time synchronization underwater acoustic underwater wireless sensor networks

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