Results 111 to 120 of about 1,130 (162)

Shallow Underwater Acoustic Massive MIMO Communications

IEEE Transactions on Signal Processing, 2021
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Wu, W, Gao, X, Sun, C, Li, GY, Li, G
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OFDMA for underwater acoustic communications

2011 49th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2011
We investigate the possibility of using orthogonal frequency division multiple access (OFDMA) for design of efficient underwater acoustic (UWA) networks. The major challenge for the OFDMA-based UWA communication systems is the Doppler-induced frequency scaling, which may cause severe intercarrier interference (ICI), and depending on the particular user
Kai Tu, Tolga M. Duman, Milica Stojanovic, John G. Proakis   +3 more
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Acoustic triboelectric nanogenerator for underwater acoustic communication

Nano Energy
Huilin Ge, Yannan Xie, Yuchen Pan
exaly   +2 more sources

Cooperative underwater acoustic communications.

IEEE Commun. Mag., 2013
This article presents a contemporary overview of underwater acoustic communication (UWAC) and investigates physical layer aspects on cooperative transmission techniques for future UWAC systems. Taking advantage of the broadcast nature of wireless transmission, cooperative communication realizes spatial diversity advantages in a distributed manner.
Suhail Al-Dharrab, Murat Uysal, Tolga M. Duman   +2 more
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Underwater acoustic communications

Proceedings of OCEANS '93, 2002
The paper first attempts to provide a framework for the underwater acoustic communication system. An acoustic frequency band allocation, analogous to that used by radio engineers, is proposed. Similarly, the "shallow" channel is defined and the conditions pertaining to "high" bit rate explored.
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Signal processing for underwater acoustic communications

IEEE Communications Magazine, 2009
The performance and complexity of signal processing systems for underwater acoustic communications has dramatically increased over the last two decades. With its origins in noncoherent modulation and detection for communication at rates under 100 b/s, phase-coherent digital communication systems employing multichannel adaptive equalization with ...
Andrew C. Singer, Jill K. Nelson, Suleyman Serdar Kozat   +2 more
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Network-assisted underwater acoustic communications

Proceedings of the Seventh ACM International Conference on Underwater Networks and Systems - WUWNet '12, 2012
For many underwater acoustic applications, the source and receiver systems carry a single transducer antenna. The lack of spatial diversity makes it difficult to carry out phase coherent communications. Using distributed nodes of an underwater acoustic network, this paper address phase coherent underwater acoustic communications using source diversity.
T. C. Yang 0001, Kevin D. Heaney
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Cooperative Transmission for Underwater Acoustic Communications

2008 IEEE International Conference on Communications, 2008
Underwater acoustic channels normally have low data rate, long propagation delay, severe multipath effect, and time varying fading. Cooperative transmission is a new wireless communication technique in which diversity gain is achieved by utilizing relay nodes as virtual antennae.
Han, Zhu, Sun, Yan Lindsay, Shi, Hongyuan   +2 more
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Beyond underwater acoustic communications

OCEANS 2011 IEEE - Spain, 2011
The ability to communicate underwater using acoustic energy in place of electromagnetic energy is rapidly becoming commonplace. Indeed, vendors and academic researchers in many advanced countries are pursuing the development of acoustic modems. The emphasis often varies among these efforts: some, especially academic researchers, focus on increased ...
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Efficient use of bandwidth for underwater acoustic communication

The Journal of the Acoustical Society of America, 2013
In a recent shallow water experiment, acoustic communication transmissions were carried out over the 10 to 32 kHz band in ∼100 m deep water over a 3 km range. A natural question is how best to utilize that bandwidth. In one multiband approach discussed previously, the band was divided into four smaller subbands that were processed independently using ...
H C, Song, W S, Hodgkiss
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