Proceedings of the 12th International Conference on Underwater Networks & Systems最新文献

Effective Communications over Doubly-Selective Acoustic Channels using Iterative Signal Cancelation 利用迭代信号对消技术实现双选择声信道的有效通信

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3152761

C. Schlegel, D. Truhachev, Zahra Alavizadeh, A. Vaezi

{"title":"Effective Communications over Doubly-Selective Acoustic Channels using Iterative Signal Cancelation","authors":"C. Schlegel, D. Truhachev, Zahra Alavizadeh, A. Vaezi","doi":"10.1145/3148675.3152761","DOIUrl":"https://doi.org/10.1145/3148675.3152761","url":null,"abstract":"A low-frequency doubly-spread acoustic channel is used to illustrate the effectiveness of iterative (turbo-) equalization for rapidly changing communications channels. The channel is modeled as a 1 km shallow ocean channel and its physical parameters are supported by recent measurements conducted by Dalhousie University. The proposed signal processing mechanism for equalization and decoding borrows from turbo equalization, but uses repetition coding and frequency-domain signal processing. Both have been shown to be advantagous for signaling on radio-frequency channels. Several simulation experiments verify that iterative interchannel interference cancelation can, in principle, effectively remove such interference, even for channels with very short coherence times. A low-complexity signal processing structure for effective communications over doubly-spread channels is presented and its performance is quantified in a series of experiements and related to the theoretically obtainable maximum performance, providing a well-rooted baseline benchmark for other methods, or the future inclusion of channel estimation and tracking algorithms.","PeriodicalId":215853,"journal":{"name":"Proceedings of the 12th International Conference on Underwater Networks & Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114175825","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

The Barrow Strait Real Time Observatory: Under-ice Monitoring in the Canadian High Arctic 巴罗海峡实时观测站:加拿大北极高地冰下监测

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3152195

C. Richards, M. Pittman, Kirk Phelan, S. Nudds, J. Hamilton

{"title":"The Barrow Strait Real Time Observatory: Under-ice Monitoring in the Canadian High Arctic","authors":"C. Richards, M. Pittman, Kirk Phelan, S. Nudds, J. Hamilton","doi":"10.1145/3148675.3152195","DOIUrl":"https://doi.org/10.1145/3148675.3152195","url":null,"abstract":"Oceanographic monitoring in the Arctic is important for understanding the physical, chemical, and biological environments, particularly given the enhanced warming of high latitude regions compared with the global average. Ongoing in situ monitoring in Barrow Strait, in the Northwest Passage, by Fisheries and Oceans Canada scientists at the Bedford Institute of Oceanography have established a baseline of the physical environment that has been used for assessing Arctic ocean freshwater export, the role of sea-ice freeze-up and break-up on ecosystem dynamics, and prediction of sea-ice processes based on water property measurements. In recent years, the deployment of an underwater observatory has permitted the retrieval of year-round near real-time data from Barrow Strait using an underwater network comprised of acoustic modems, a sub-sea cable, and an Iridium connected shore station. A strength of the system design is that it permits real-time data retrieval even during Arctic winter conditions. In this paper, we present an overview of the Barrow Strait real-time observatory system, the scientific goals motivating the real-time data stream, and examples of the newest instruments integrated into the system (including ice draft and passive acoustics).","PeriodicalId":215853,"journal":{"name":"Proceedings of the 12th International Conference on Underwater Networks & Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129860511","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: 4

Matched-field source localization using sparsely-coded neural network and data-model mixed training 基于稀疏编码神经网络和数据模型混合训练的匹配场源定位

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148717

Shou-Fu Cai, Wen Xu

引用次数: 1

Path Gain Characterization of Shallow Water Acoustic Channel: A Geometry based Approach 浅水声通道路径增益表征:一种基于几何的方法

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148726

Farheen Fauziya, Brejesh Lall, M. Agrawal, Ayushi Garg, Krutika Jaiswal

引用次数: 0

Detecting Abnormal Speed of Marine Robots using Controlled Lagrangian Particle Tracking Methods 基于可控拉格朗日粒子跟踪方法的船舶机器人异常速度检测

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148714

Sungjin Cho, Fumin Zhang, C. Edwards

引用次数: 0

Securing Underwater Communications: Key Agreement based on Fully Hashed MQV 水下通信安全:基于全哈希MQV的密钥协议

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3152760

A. Capossele, C. Petrioli, Gabriele Saturni, D. Spaccini, D. Venturi

引用次数: 10

Simultaneous Design of Underwater Acoustic Sensor and Communication Networks 水声传感器与通信网络的同步设计

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148676

S. Blouin

引用次数: 3

Performance of the combined free/demand assignment multiple access protocol via underwater networks 水下网络中组合自由/需求分配多址协议的性能

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148678

W. Gorma, P. Mitchell

引用次数: 6

Estimation of the Under-Ice Acoustic Field in AUV Communication Networks 水下航行器通信网络冰下声场的估计

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148711

Wensheng Sun, Chaofeng Wang, Zhaohui Wang, Min-je Song

{"title":"Estimation of the Under-Ice Acoustic Field in AUV Communication Networks","authors":"Wensheng Sun, Chaofeng Wang, Zhaohui Wang, Min-je Song","doi":"10.1145/3148675.3148711","DOIUrl":"https://doi.org/10.1145/3148675.3148711","url":null,"abstract":"Autonomous underwater vehicles (AUVs) are the platform of choice for ocean exploration and surveillance in the ice-covered regions. Due to the large attenuation of radio signals in water, acoustic communications have been the major technique for underwater wireless information transfer. In the under-ice environment, the acoustic propagation is largely determined by a stratified sound speed profile (SSP) and the ice-reflection characteristics. Based on the ray theory, this work develops an inversion algorithm to estimate the SSP and the ice reflection coefficient via an iterative method. The acoustic measurements collected during data transmission within the AUV network, including the propagation delay and the amplitude of the received signal along each eigen path, are used for the inversion. With the estimated SSP and the ice-reflection coefficient, the under-ice acoustic field can then be constructed to guide future acoustic communications among the AUVs. The proposed algorithm is evaluated via Bellhop synthesized data and achieves decent accuracy in the SSP and the ice-reflection coefficient estimation.","PeriodicalId":215853,"journal":{"name":"Proceedings of the 12th International Conference on Underwater Networks & Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124774021","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

Advanced Data Processing for Communication-constrained Underwater Domain 通信受限水下域的高级数据处理

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI: 10.1145/3148675.3148687

Ibrahim L. Olokodana, Yonghui Wang, Lijun Qian

{"title":"Advanced Data Processing for Communication-constrained Underwater Domain","authors":"Ibrahim L. Olokodana, Yonghui Wang, Lijun Qian","doi":"10.1145/3148675.3148687","DOIUrl":"https://doi.org/10.1145/3148675.3148687","url":null,"abstract":"In many practical underwater sensor networks covering a large area, only a small portion of the data may be collected in a certain time interval due to limited capacity of acoustic communications underwater. This posed a great challenge for situation awareness applications where the data for the entire area is needed. In this paper, a joint sensor selection and data recovery scheme is proposed to address the challenge. Specifically, a small portion of sensors are selected using the independent thinning principle from Stochastic Geometry to transmit their data to the surface station. Then Total Variation Inpainting is applied to recover the entire data of the whole area from the available data. The proposed scheme offers a promising solution in situations where only small amount of data could be captured due to the difficult underwater environment. It also saves time because computing at the surface station for data reconstruction takes much less time comparing to data collection. The simulation results using both synthetic data and real data demonstrate the effectiveness of the proposed method.","PeriodicalId":215853,"journal":{"name":"Proceedings of the 12th International Conference on Underwater Networks & Systems","volume":"517 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133367341","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