Underwater acoustic communications: Design considerations at the physical layer based on field trials

2012 ◽  
Author(s):  
Babu.T.P Sameer ◽  
R. David Koilpillai ◽  
P. Muralikrishna
Keyword(s):  
Field Trials ◽  
Physical Layer ◽  
Underwater Acoustic Communications ◽  
Acoustic Communications ◽  
Underwater Acoustic ◽  
Design Considerations

Recent Trends in Underwater Acoustic Communications

2013 ◽  
Vol 47 (5) ◽  
pp. 45-50 ◽  
Author(s):  
Milica Stojanovic ◽  
Lee Freitag
Keyword(s):  
Performance Metrics ◽  
Signal To Noise Ratio ◽  
The United States ◽  
Physical Layer ◽  
Small Scale ◽  
Underwater Acoustic Communications ◽  
Signal To Noise ◽  
Acoustic Communications ◽  
Underwater Acoustic ◽  
Noise Ratio

AbstractAdvances in underwater acoustic communications technology are being enabled by more access to in-water data and an infusion of new techniques, researchers, and students. In-water data collection is being made possible by robust funding in the United States, the European Union, and other countries, typically to multiorganization consortia working on both physical and network layer research. At the physical layer, single and multicarrier modulation methods continue to be refined, with a focus on both low signal-to-noise ratio, low-rate and high signal-to-noise ratio, high-rate data links. Establishment of performance metrics for adaptive equalizers and other parts of the physical layer continue, and recent work on high-fidelity channel models that mimic the effects of small-scale ocean processes indicates that progress is being made.Research in undersea acoustic networks continues to gain momentum as well, with multiple options available for integrating acoustic propagation models with network simulation, providing common frameworks for basing network design. The combination of these recent advances, plus continued interest by maritime science and industry in wireless communications, means that the field is poised to make new commercial breakthroughs in the next several years.

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