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Proceedings of the 13th International Conference on Underwater Networks & Systems最新文献

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Design of a collisonless underwater acoustic network 无碰撞水声网络的设计
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291948
T. C. Yang, S. H. Huang
{"title":"Design of a collisonless underwater acoustic network","authors":"T. C. Yang, S. H. Huang","doi":"10.1145/3291940.3291948","DOIUrl":"https://doi.org/10.1145/3291940.3291948","url":null,"abstract":"A hardware solution for a collisonless underwater acoustic networks is proposed in this paper. Each node will be equipped with a horizontal circular array, by which signals from different sources located at different look directions, or bearings, will be extracted by beamforming with little interference from signals from sources at other directions. Based on simulations (T. C. Yang, \"Performance analysis of superdirectivity of circular arrays and implications for sonar systems,\" IEEE J. Oceanic Eng., 10.1109/JOE.2018.2801144) and some laboratory data, signals from different bearings are found well separated using a technology called superdirective array, which provides high resolution in bearing estimation, high directivity index or array gain, and strong interference rejection compared with conventional beamforming.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121170468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A practical guide to chirp spread spectrum for acoustic underwater communication in shallow waters 浅水水声通信中的啁啾扩频实用指南
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291964
Fabian Steinmetz, J. Heitmann, C. Renner
{"title":"A practical guide to chirp spread spectrum for acoustic underwater communication in shallow waters","authors":"Fabian Steinmetz, J. Heitmann, C. Renner","doi":"10.1145/3291940.3291964","DOIUrl":"https://doi.org/10.1145/3291940.3291964","url":null,"abstract":"Small and cheap micro AUVs enable diverse underwater monitoring applications in shallow inshore waters; e.g., inspection of underwater assets, observation of water quality, and identification of pollution sources. The formation and collaboration of swarm members yet requires communication and self-localization based on cheap, miniature acoustic devices. However, this is severely hampered by the effects of multi-path propagation and scattering in shallow waters. In general, we discovered improvements of chirp-based---i.e., frequency-sweep---synchronization in these scenarios. This paper presents strategies to find proper chirp parameters. First, we study the benefits and applicability of chirp-based modulation against FSK. Second, we discuss the impact of the chirp parameters in real-world scenarios and identify sweep spots w.r.t. bandwidth to improve the standard deviation of the position in the time domain up to 86 % above this point. Third, we present instructions to choose these parameters in an efficient and appropriate way for any shallow water scenario.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114776947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
A low-medium frequency sound velocity measurement device and measurement result via comparison method 一种低中频声速测量装置及比较法测量结果
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291943
Zhiguo Qu, Xinghui Cao, Binjian Shen
{"title":"A low-medium frequency sound velocity measurement device and measurement result via comparison method","authors":"Zhiguo Qu, Xinghui Cao, Binjian Shen","doi":"10.1145/3291940.3291943","DOIUrl":"https://doi.org/10.1145/3291940.3291943","url":null,"abstract":"Accurate calibration, of acoustic velocity in water is essential in acoustic measurement. In order to measure the acoustic velocity in water, a sound propagation delay detection device based on correlation method is designed. This paper gives a detailed introduction of this medium and low frequency sound velocity measurement device and the results of sound velocity measurement obtained by comparative method. This device can be used for sound velocity detection of other media in water.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124124385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A learning-based ALOHA protocol for underwater acoustic sensor networks 一种基于学习的水声传感器网络ALOHA协议
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291942
Linlin Wang, Can Lin, Keyu Chen, Yuyu Zhang
{"title":"A learning-based ALOHA protocol for underwater acoustic sensor networks","authors":"Linlin Wang, Can Lin, Keyu Chen, Yuyu Zhang","doi":"10.1145/3291940.3291942","DOIUrl":"https://doi.org/10.1145/3291940.3291942","url":null,"abstract":"MAC protocols determine the way in which channels are shared between nodes[1]. In order to reduce and avoid data packet conflicting, a control mechanism needs to be determined to allocate the use of channel resources reasonably. The main task of a MAC protocol is to prevent or resolve collision of data packets, while providing energy efficiency, low channel access delays and fairness among the nodes in a network[2].","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126539830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Underwater image processing: MSRCR algorithm based on the guided filter of sobel operator 水下图像处理:基于sobel算子引导滤波的MSRCR算法
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291959
Lu Teng, Feng Xue
{"title":"Underwater image processing: MSRCR algorithm based on the guided filter of sobel operator","authors":"Lu Teng, Feng Xue","doi":"10.1145/3291940.3291959","DOIUrl":"https://doi.org/10.1145/3291940.3291959","url":null,"abstract":"Aiming at solving the problems of \"halo pseudo-color\" and detail blur of underwater image by existing algorithm, a new color restoration of multi-scale Retinex(MSRCR) image enhancement algorithm based on guided filter of sobel operator is proposed. Using the sobel edge detection operator to calculate the gradient magnitude of the image, the fixed regularization parameter of the traditional guided filter is discriminated and it is adaptive in the edge region and the smooth region of image. Then, the Gaussian filter of traditional MSRCR is replaced with the guided filter based on the sobel edge detection operator. Experimental results shows that the proposed algorithm not only highlights the edge details and color fidelity, but also has lower computational complexity and higher efficiency.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124026018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Connectivity of underwater cognitive acoustic networks under spectrum constraint 频谱约束下水下认知声网络的连通性
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291947
Qiu Wang, Hongning Dai, Hao Wang, Qubeijian Wang
{"title":"Connectivity of underwater cognitive acoustic networks under spectrum constraint","authors":"Qiu Wang, Hongning Dai, Hao Wang, Qubeijian Wang","doi":"10.1145/3291940.3291947","DOIUrl":"https://doi.org/10.1145/3291940.3291947","url":null,"abstract":"There is an extensive attention on underwater cognitive acoustic networks (UCANs) since acoustic spectrum becomes deficient owning to the proliferation of human activity in ocean. This paper presents an overview of our recent progress in investigating the connectivity of secondary users (SUs) in UCANs. In particular, this model takes both topological connectivity and spectrum availability into account. Simulation results verify the accuracy of the proposed model.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121104353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Underwater localization with sound velocity profile 声速剖面水下定位
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291960
Yuhan Dong, Chuanzhen Sun, Kai Zhang
{"title":"Underwater localization with sound velocity profile","authors":"Yuhan Dong, Chuanzhen Sun, Kai Zhang","doi":"10.1145/3291940.3291960","DOIUrl":"https://doi.org/10.1145/3291940.3291960","url":null,"abstract":"Underwater acoustic sensor networks (UASNs) is a widely used enabling technique for various underwater applications. To facilitate these real applications, it is essential to obtain the position information of sensor nodes by localization methods. One of the most common localization approaches employs time-of-arrival (TOA) to measure and utilize the distances from the target node to several anchor nodes with known positions by simply multiplying the sound speed and propagation time. These existing works ideally assume a linear trajectory of acoustic wave in underwater. In practice, however, underwater sound velocity varies with temperature, salinity and pressure as depicted in sound velocity profile (SVP), which deteriorates the localization accuracy. In this work, we consider the underwater localization in the presence of SVP. By assuming that the SVP is roughly linear and the sound velocity only depends on the depth, we propose to apply particle swarm optimization (PSO) to further improve the localization accuracy. Numerical results suggest that the proposed algorithm achieves better localization performance than traditional approaches.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120963758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Multi-hop underwater acoustic networks based on BATS codes 基于BATS码的多跳水声网络
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291981
Shenghao Yang, Jun Ma, Xuan Huang
{"title":"Multi-hop underwater acoustic networks based on BATS codes","authors":"Shenghao Yang, Jun Ma, Xuan Huang","doi":"10.1145/3291940.3291981","DOIUrl":"https://doi.org/10.1145/3291940.3291981","url":null,"abstract":"Multi-hop data transmission is necessary in many underwater scenarios, where instead of transmitting directly over one long hop from the source node to the destination node, multiple intermediate nodes are added between the source node and the destination node. Due to the long propagation delay and the high packet loss rate of the under water acoustic communication links, achieving high end-to-end throughput in multi-hop underwater acoustic networks is challenging. This paper proposes a practical transport-network layer scheme to achieve high throughput and low latency data transmission in multi-hop underwater networks using BATS codes, which are a class of efficient linear network coding scheme with a matrix generalization of fountain codes as the outer code, and batch-based linear network coding as the inner code.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115008390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Relay-assisted optical wireless communications in turbid water 混浊水中中继辅助光学无线通信
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291984
Kapila W. S. Palitharathna, R. Godaliyadda, V. R. Herath, H. Suraweera
{"title":"Relay-assisted optical wireless communications in turbid water","authors":"Kapila W. S. Palitharathna, R. Godaliyadda, V. R. Herath, H. Suraweera","doi":"10.1145/3291940.3291984","DOIUrl":"https://doi.org/10.1145/3291940.3291984","url":null,"abstract":"Underwater optical wireless communication (UOWC) systems are subject to severe performance degradation due to undissolved particles that make the water turbid. The point source diffusion of a substance in water creates a Gaussian-distributed attenuation spread for a given time instance, which makes communication challenging. To overcome this issue, we propose a dual-hop UOWC system in which the transmitter-receiver link is assisted by several amplify-and-forward relay nodes. To characterize the performance gains of this relay system, we study the bit error rate assuming on-off keying modulation. We investigate the impact of key system and particle distribution parameters such as the transmit power, the number of relays, and the spatial position of the attenuation spread on the performance.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"28 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114130037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Doppler effect mitigation over mobile underwater acoustic OFDM system 移动水声OFDM系统的多普勒效应抑制
Proceedings of the 13th International Conference on Underwater Networks & Systems Pub Date : 2018-12-03 DOI: 10.1145/3291940.3291965
Jingxin Xu, Deqing Wang, Xiaoyi Hu, Yongjun Xie
{"title":"Doppler effect mitigation over mobile underwater acoustic OFDM system","authors":"Jingxin Xu, Deqing Wang, Xiaoyi Hu, Yongjun Xie","doi":"10.1145/3291940.3291965","DOIUrl":"https://doi.org/10.1145/3291940.3291965","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) has prevailed in high speed underwater acoustic(UWA) communications with obvious multipath effects. However, with the characteristic of being sensitive to the Doppler effect, the performance of an OFDM system is severely limited by the intercarrier interference (ICI) introduced by Doppler spread. In this paper, we build a hydroacoustic baseband defferentially encoded OFDM system and propose an effective approach to mitigate the Doppler effect for the system. After utilizing the Chirp-Z transform(CZT) to estimate a coarse common value of large scale Doppler factor a and null subcarriers for the estimation of residual Doppler am for each OFDM symbol, we use the method of polyphase filter resampling to compensate them. We also correct the phase rotation effect caused by timing sampling offset according to the residual Doppler estimation result. Simulation and experimental results show that while meeting the accuracy requirement of Doppler scaling factor estimation in mobile UWA communications, the proposed algorithm can be used to accurately and effectively estimate the Doppler scaling factor and requires lower computational complexity.","PeriodicalId":429405,"journal":{"name":"Proceedings of the 13th International Conference on Underwater Networks & Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132688280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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