Implementation of a sweep-spread function for communication over underwater acoustic channels

K. Kebkal, R. Bannasch
{"title":"Implementation of a sweep-spread function for communication over underwater acoustic channels","authors":"K. Kebkal, R. Bannasch","doi":"10.1109/OCEANS.2000.882204","DOIUrl":null,"url":null,"abstract":"Communication over underwater acoustic channels with strong, extended multipath can be substantially improved by using a new method based on the implementation of a sweep-spread carrier (S2C). Such a carrier consists of a succession of sweeps, which cause permanent rapid fluctuation of signal frequency. Apart from some additional useful effects such as providing multi-user access and reducing influence of narrow-band noise, the sweep-spreading represents a powerful tool enabling separation of signal multipaths by converting their time delay into frequency split of individual multipath arrivals. The steeper the sweeps, the better multipath resolution can be achieved. After signal despreading, i.e. conversion into a constant intermediate frequency, the best suitable multipath arrival (or even several of them in parallel) can be separated and analyzed. In this way, all signal parameters can be recovered with high quality. The high performance and transmission stability of this approach could be confirmed in computer simulations as well as in validation experiments with horizontal transmission in natural shallow water channels carried out since summer 1999.","PeriodicalId":68534,"journal":{"name":"中国会展","volume":"29 1","pages":"1829-1837 vol.3"},"PeriodicalIF":0.0000,"publicationDate":"2000-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"中国会展","FirstCategoryId":"96","ListUrlMain":"https://doi.org/10.1109/OCEANS.2000.882204","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7

Abstract

Communication over underwater acoustic channels with strong, extended multipath can be substantially improved by using a new method based on the implementation of a sweep-spread carrier (S2C). Such a carrier consists of a succession of sweeps, which cause permanent rapid fluctuation of signal frequency. Apart from some additional useful effects such as providing multi-user access and reducing influence of narrow-band noise, the sweep-spreading represents a powerful tool enabling separation of signal multipaths by converting their time delay into frequency split of individual multipath arrivals. The steeper the sweeps, the better multipath resolution can be achieved. After signal despreading, i.e. conversion into a constant intermediate frequency, the best suitable multipath arrival (or even several of them in parallel) can be separated and analyzed. In this way, all signal parameters can be recovered with high quality. The high performance and transmission stability of this approach could be confirmed in computer simulations as well as in validation experiments with horizontal transmission in natural shallow water channels carried out since summer 1999.
在水声信道上进行通信的扫描扩展功能的实现
通过使用一种基于扫描扩展载波(S2C)的新方法,可以大大改善具有强扩展多径的水声信道的通信。这种载波由连续的扫频组成,扫频引起信号频率的永久快速波动。除了一些额外的有用效果,如提供多用户访问和减少窄带噪声的影响外,扫描扩展是一种强大的工具,通过将信号多路径的时间延迟转换为单个多路径到达的频率分割,从而实现信号多路径的分离。扫描越陡峭,可以获得更好的多径分辨率。信号扩频后,即转换为恒定的中频后,可以分离并分析最合适的多径到达(甚至多个并行到达)。这样可以高质量地恢复所有信号参数。1999年夏季以来进行的自然浅水河道水平传输实验和计算机模拟验证了该方法的高性能和传输稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
8254
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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