Acoustic (Underwater) Communications
Acoustic (Underwater) Communications
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DOI：
10.1002/0471219282.eot110
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发表时间：
2003-04
期刊：
影响因子：
--
通讯作者：
M. Stojanovic
中科院分区：
文献类型：
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作者：
M. Stojanovic
水下无线通信的需求存在于近海石油工业、环境监测、潜水员之间的语音传输、自主水下机器人的控制以及用于探测物体和发现新资源的海底测绘。无线水下通信可以通过传输声波来建立。然而，通信信道的带宽有限，往往会造成严重的多径色散和时变性。尽管有这些限制，90年代的S的研究努力最终发展到能够在不同距离上以每秒几千比特系统的速率传输信息的水声调制解调器。新出现的场景是由固定节点和移动节点组成的水下通信网络。目前的研究集中在设计高效的调制和编码方案、用于均衡和分集合并的自适应信号处理算法、适合于水下环境中遇到的低带宽、长传播延迟和严格功率要求的多址通信方法和网络协议。关键词：水下通信；水声通信；带宽高效调制；自适应均衡；分集合并；低复杂度接收机；相位相干检测；信道估计；多径传播；多用户检测；水下网络
The need for underwater wireless communications exists in off-shore oil industry, environmental monitoring, speech transmission between divers, control of autonomous underwater vehicles, and mapping of the ocean floor for detection of objects and discovery of new resources. Wireless underwater communications can be established by transmission of acoustic waves. However, the communication channels have limited bandwidth, and often cause severe multipath dispersion and time-variability. Despite these limitations, research efforts of the 90's have culminated in the development of underwater acoustic modems that are capable of transmitting information at rates on the order of several kilobits per second systems over varying distances. The emerging scenario is that of an underwater communication network consisting of both stationary and mobile nodes. Current research is focusing on the design of efficient modulation and coding schemes, adaptive signal processing algorithms for equalization and diversity combining, multiple-access communication methods and network protocols suited for low bandwidth, long propagation delays and strict power requirements encountered in the underwater environment. Keywords: underwater communications; acoustic communications; bandwidt-efficient modulation; adaptive equalization; diversity combining; reduced-complexity receivers; phase-coherent detection; channel estimation; multipath propagation; multiuser detection; underwater networks