发布求助
文献互助 智能选刊 最新文献

Proceedings of the 9th International Conference on Underwater Networks & Systems最新文献

筛选
英文 中文
Design of Underwater Acoustic Modems through High Performance DSPs 基于高性能dsp的水声调制解调器设计
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674598
Lijun Xu, Shefeng Yan
{"title":"Design of Underwater Acoustic Modems through High Performance DSPs","authors":"Lijun Xu, Shefeng Yan","doi":"10.1145/2671490.2674598","DOIUrl":"https://doi.org/10.1145/2671490.2674598","url":null,"abstract":"In this paper, we present an acoustic modem hardware design through the use of a low power, high performance digital signal processor (DSP). The modem uses either MFSK or MPSK modulation methods for data transmission. The floating-point DSP, TMS320C6478, is used to transmit the modulated signal, perform demodulation, and support the network protocol. Several algorithms including Doppler shift correction, adaptive equalizer, and TURBO decoder are fully implemented in the DSP. A low-power, high performance Xilinx FPGA, XC6SLX45, is also used to handle the peripherals. When in the low power mode for the MFSK scheme, the acoustic modem has a power consumption of 0.8 watt. When performing the MPSK scheme, the total power consumption of the modem is 1.5 watt. The designed modems are currently used in our underwater acoustic network.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127251684","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
Cognitive Acoustics: Making Underwater Communications Environment-friendly 认知声学:使水下通信更加环保
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2676781
Yu Luo, Lina Pu, M. Zuba, Zheng Peng, Jun-hong Cui
{"title":"Cognitive Acoustics: Making Underwater Communications Environment-friendly","authors":"Yu Luo, Lina Pu, M. Zuba, Zheng Peng, Jun-hong Cui","doi":"10.1145/2671490.2676781","DOIUrl":"https://doi.org/10.1145/2671490.2676781","url":null,"abstract":"Imagine an underwater world with hybrid acoustic users, as illustrated in Fig. 1. An oil drilling installation system may employ a sensor network with acoustic modems to monitor the deflection of the drill. In the same area there could also exist a bottom mounted data collection system using another underwater acoustic network (UAN) to communicate with surface buoys. Meanwhile, there could be autonomous underwater vehicles (AUVs) cruising in the water to inspect subsea oil pipelines and transmitting data wirelessly to their mothership. In addition, a few marine mammals, e.g. dolphins and whales, might be playing in the neighborhood, using the same acoustic channel to communicate with each other and search for food via echolocation. Now the question is: Will existing UANs work well in this scenario? Unfortunately, the answer is no.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126499622","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: 12
A Comparison of a Single Receiver and a Multi-Receiver Techniques to Mitigate Partial Band Interference 减轻部分频带干扰的单接收机和多接收机技术的比较
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674563
James McGee, Steven Schoenecker, J. Catipovic, P. Swaszek
{"title":"A Comparison of a Single Receiver and a Multi-Receiver Techniques to Mitigate Partial Band Interference","authors":"James McGee, Steven Schoenecker, J. Catipovic, P. Swaszek","doi":"10.1145/2671490.2674563","DOIUrl":"https://doi.org/10.1145/2671490.2674563","url":null,"abstract":"Many acoustic channels suffer from interference which is neither narrowband nor impulsive. This relatively long duration partial band interference can be particularly detrimental to system performance. We survey recent work in interference mitigation as background motivation to develop a spatial diversity receiver for use in underwater networks and compare this novel multi-receiver interference mitigation strategy with a recently developed single receiver interference mitigation algorithm using experimental data collected from the underwater acoustic network at the Atlantic Underwater Test and Evaluation Center. The network consists of multiple distributed cabled hydrophones that receive data transmitted over a time-varying multipath channel in the presence of partial band interference produced by interfering active sonar signals. In operational networks, many \"dropped\" messages are lost due to partial band interference which corrupts different portions of the received signal depending on the relative position of the interferers, information source and receivers due to the slow speed of propagation.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130502509","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
Attack Resilient Underwater Networks Through Software Defined Networking 通过软件定义网络攻击弹性水下网络
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674589
Giovanni Toso, D. Munaretto, M. Conti, M. Zorzi
{"title":"Attack Resilient Underwater Networks Through Software Defined Networking","authors":"Giovanni Toso, D. Munaretto, M. Conti, M. Zorzi","doi":"10.1145/2671490.2674589","DOIUrl":"https://doi.org/10.1145/2671490.2674589","url":null,"abstract":"In this paper we discuss how security of Underwater Acoustic Networks (UANs) could be improved by leveraging the concept of Software Defined Networking (SDN). In particular, we consider a set of realistic network deployment scenarios and security threats. We propose possible approaches towards security countermeasures that employ the SDN paradigm, and that could significantly mitigate the impact of attacks. Furthermore, we discuss those approaches with respect to deployment issues such as routing configuration, nodes trajectory optimization, and management of the node buffers. We believe that the proposed approaches could pave the way to further research in the design of UANs that are more resilient to both attacks and failures.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121229161","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: 8
On Signal Attenuation at Microwaves Frequencies Underwater 水下微波频率信号衰减研究
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674591
J. C. Reyes-Guerrero, Mark Bokenfohr, T. Ciamulski
{"title":"On Signal Attenuation at Microwaves Frequencies Underwater","authors":"J. C. Reyes-Guerrero, Mark Bokenfohr, T. Ciamulski","doi":"10.1145/2671490.2674591","DOIUrl":"https://doi.org/10.1145/2671490.2674591","url":null,"abstract":"In this work, we present experimental results on microwave propagation in the 2.4 GHz band in both seawater and freshwater. Measurements are carried out in a water tank by using well-known dipole antennas. We demonstrate that averaged channel gain values can be modeled by linear regression functions when they are represented in dB units along the distance. Experimental results set a baseline for further research on antenna design. They may also be used for further simulations of EM propagation in water. The study is useful to explore microwave signal coverage for planning underwater communications, and it is part of the current undergoing research carried out by WiSub AS and UiB on the development of subsea contactless connectors.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122502470","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
Design and Implementation of OFDM Underwater Acoustic Communication Algorithm Based on OMAP-L138 基于OMAP-L138的OFDM水声通信算法的设计与实现
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674577
Songzuo Liu, Ma Lu, L. Hui, Tingting Chen, Gang Qiao
{"title":"Design and Implementation of OFDM Underwater Acoustic Communication Algorithm Based on OMAP-L138","authors":"Songzuo Liu, Ma Lu, L. Hui, Tingting Chen, Gang Qiao","doi":"10.1145/2671490.2674577","DOIUrl":"https://doi.org/10.1145/2671490.2674577","url":null,"abstract":"In recent years, orthogonal frequency division multiplexing (OFDM) technology has been widely investigated for both point-to-point underwater acoustic communications and for networks. In this paper, we implement the OFDM underwater acoustic communication algorithm on an OMAP-L138 platform, which possesses characteristics of low-power, rich peripheral and dual-core cooperation. The real-time processing capacity and good expansibility of this system have been verified. An error-free communication result has been achieved in a quasi-stationary pool experiment.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122625881","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: 7
MACA-APT: A MACA-based Adaptive Packet Train transmission protocol for Underwater Acoustic Networks MACA-APT:一种基于maca的水声网络自适应分组传输协议
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674580
S. Azad, P. Casari, Khandaker Tabin Hasan, M. Zorzi
{"title":"MACA-APT: A MACA-based Adaptive Packet Train transmission protocol for Underwater Acoustic Networks","authors":"S. Azad, P. Casari, Khandaker Tabin Hasan, M. Zorzi","doi":"10.1145/2671490.2674580","DOIUrl":"https://doi.org/10.1145/2671490.2674580","url":null,"abstract":"In wireless communications, collision is one of the principal sources of energy wastage, which often makes collision avoidance strategies preferred for medium access control (MAC) protocols. In this paper, we propose a collision avoidance-based MAC protocol called MACA-based Adaptive Packet Train (MACA-APT), which has been designed specifically for underwater acoustic networks (UANs). The design explicitly accounts for prominent characteristics of UANs such as long propagation delays and typically high bit error rates. In particular, the former is compensated via the transmission of multiple consecutive packets to multiple different receivers; the latter, instead, is tackled by embedding a cross-layer Stop&Wait ARQ scheme within MACA-APT. The performance of the proposed protocol is evaluated via simulations and compared to another MAC protocol, also based on MACA, showing that MACA-APT achieves better performance for low to intermediate packet generation rates, and equivalent performance at higher rates. Moreover, we assess the impact of the packet train size on the performance of either protocol. This result is a first step towards the design of adaptive multi-packet multi-receiver MAC protocols for underwater networks.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130383460","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
On Capacity and Delay Scaling Laws in Underwater Acoustic Networks 水声网络中容量和时延的标度规律
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674573
Guang-yu Fan, Hui-fang Chen, Lei Xie, Jun-hong Cui
{"title":"On Capacity and Delay Scaling Laws in Underwater Acoustic Networks","authors":"Guang-yu Fan, Hui-fang Chen, Lei Xie, Jun-hong Cui","doi":"10.1145/2671490.2674573","DOIUrl":"https://doi.org/10.1145/2671490.2674573","url":null,"abstract":"Network capacity is a fundamental issue for terrestrial wireless networks and underwater acoustic networks (UWANs). The underwater acoustic channel, which is characterized by a path loss depending on the transmission distance and the signal frequency, is quite different from the terrestrial wireless one. And sensor nodes are usually deployed sparsely in UWANs. The capacity of UWANs is much more difficult to analyze than that of terrestrial wireless networks. Based on special characteristics of UWANs, the capacity and the delay scaling laws in different UWANs are analyzed in this paper. First, we study the capacity scaling and the delay scaling in two-dimensional extended and dense networks. Then, the results are extended to three-dimensional UWANs.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115676413","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 Node Placement Optimization Method for Watershed Underwater Sensor Networks 流域水下传感器网络节点布局优化方法
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674576
Gentil V. Barbosa, P. Letouze, A. Xavier
{"title":"A Node Placement Optimization Method for Watershed Underwater Sensor Networks","authors":"Gentil V. Barbosa, P. Letouze, A. Xavier","doi":"10.1145/2671490.2674576","DOIUrl":"https://doi.org/10.1145/2671490.2674576","url":null,"abstract":"Given a set of underwater sensors coordinates that are usually determined by a specialist for the design of a watershed monitoring system, where should be placed the sinks and the base station? The answer may be the minimization of the Variable Internode Distance. In such cases, a two dimensional architecture is acceptable because it is a shallow water system. Hence, in this paper, it is proposed a two-level node distance minimization for Underwater Wireless Sensor Network for monitoring systems. The mathematical method employed for optimization is the Hyperbolic Smoothing approach and the proposed method includes the placement of the base-station in the algorithm.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125587856","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
Modeling Underwater Acoustic Channels in Short-range Shallow Water Environments 短距离浅水环境下水声通道建模
Proceedings of the 9th International Conference on Underwater Networks & Systems Pub Date : 2014-11-12 DOI: 10.1145/2671490.2674560
Hovannes Kulhandjian, T. Melodia
{"title":"Modeling Underwater Acoustic Channels in Short-range Shallow Water Environments","authors":"Hovannes Kulhandjian, T. Melodia","doi":"10.1145/2671490.2674560","DOIUrl":"https://doi.org/10.1145/2671490.2674560","url":null,"abstract":"We analyze the statistical channel properties of short to very short-range shallow water communication environments based on real channel measurements taken in a water-tank, a swimming pool, very shallow and shallow lakes. More specifically, we estimate the channel impulse response (CIR), the probability density function (PDF) of channel fading and fit to Rayleigh, Nakagami, Weibull, Rician and Beta distributions. We compare the `goodness-of-fit' of these distributions based on the Kullback-Leibler (KL) divergence criteria. From our experimental results, we confirm that the shallow water acoustic channel is highly time-varying and does not necessarily follow a Rayleigh distribution. Instead, we observe that in very-shallow water lake environments the channel fading exhibits close-to Weibull or Rician distribution. On the other hand, in shallow water lake the channel fading behavior is better captured by a Beta distribution.","PeriodicalId":308192,"journal":{"name":"Proceedings of the 9th International Conference on Underwater Networks & Systems","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121961478","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: 28
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信