An Architecture for Underwater Networks (2009)
Mandar Chitre, Lee Freitag, Woods Hole, Ethem Sozer, Shiraz Shahabudeen, Milica Stojanovic, ...
Abstract – As electromagnetic waves do not propagate well underwater, acoustics plays a key role in underwater communication. Due to significant differences in the characteristics of...
Multicarrier communication over underwater acoustic channels with nonuniform Doppler shifts (2008)
Li, Baosheng, Zhou, Shengli, Stojanovic, Milica, Freitag, Lee, Willett, Peter
Author Posting. © IEEE, 2008. This article is posted here by permission of IEEE for personal use, not for redistribution. The definitive version was published in IEEE Journal of Oceanic Engineering...
High Rate Acoustic Link for Underwater Video Transmission (2008)
Costas Pelekanakis, Milica Stojanovic, Lee Freitag
A high bit rate acoustic link for video transmission over an underwater channel is investigated. The key to achieving this objective lies in two approaches: use of efficient data compression...
Multichannel Detection for Wideband Underwater Acoustic CDMA Communications (2008)
Milica Stojanovic Member, Milica Stojanovic, Lee Freitag
Direct-sequence CDMA is considered for future wideband mobile underwater acoustic networks, where a typical configuration may include several autonomous underwater vehicles operating within a few...
Acoustic Communication With Small UUVs Using a Hull-Mounted Conformal Array (2007)
Freitag, Lee, Grund, Mathew, Catipovic, Josko, Nagle, Daniel, Pazol, Brian, Glynn, James
A new conformal array designed to enhance acoustic communication on small unmanned underwater vehicles (UUVs) is presented. The array is intended to improve the reliability and rate of acoustic...
Multichannel detection for wideband underwater acoustic CDMA communications (2006)
Stojanovic, Milica, Freitag, Lee
Author Posting. © IEEE, 2006. This article is posted here by permission of IEEE for personal use, not for redistribution. The definitive version was published in IEEE Journal of Oceanic Engineering...
The WHOI micro-modem: an acoustic communications and navigation system for multiple platforms (2005)
Lee Freitag, Matthew Grund, Ipa Singh, James Partan, Peter Koski, Keenan Ball, ...
Abstract — The Micro-Modem is a compact, low-power, underwater acoustic communications and navigation subsystem. It has the capability to perform low-rate frequency-hopping frequency-shift keying...
The WHOI micro-modem: an acoustic communications and navigation system for multiple platforms (2005)
Lee Freitag, Matthew Grund, Ipa Singh, James Partan, Peter Koski, Keenan Ball, ...
Abstract — The Micro-Modem is a compact, low-power, underwater acoustic communications and navigation subsystem. It has the capability to perform low-rate frequency-hopping frequency-shift keying...
L. Freitag, M. Stojanovic, D. Kilfoyle, J. Preisig, Lee Freitag, Woods Hole, ...
Slightly more than 10 years ago the Woods Hole Oceanographic Institution and Northeastern University published a new algorithm for multi-channel adaptive equalization along with results of using that...
Acoustic communications for regional undersea observatories (2002)
Lee Freitag, Milica Stojanovic Ý, Matthew Grund, Ipa Singh
Undersea observatories connected to shore with fiber-optic cable will provide scientists with long-term measurements from deep-ocean sensors. Proposed regional observatories include NEPTUNE which...
WHOI (Woods Hole Oceanographic Institution) Acoustic Telemetry Project. (1998)
Catipovic, Josko, Freitag, Lee
The acoustic telemetry project was centered around the construction, programming and testing of a digital receiver prototype capable of supporting future signal processing algorithms in real-time...
Long Range Acoustic Communication Based on Optimal Waveform Design (1998)
Acoustic communications for long-range underwater applications is made difficult by a number of environmental factors. The most important of these in shallow water propagation is the effect of the...
Spatial Modulation in the Underwater Acoustic Channel (1998)
Kilfoyle, Daniel, Freitag, Lee
Multiple-input multiple-output (MIMO) communication channels are an active area of research for terrestrial wireless applications. The natural bandwidth limitations of the underwater acoustic channel...
Kilfoyle, Daniel B., Freitag, Lee
There have been two fundamental advances in underwater acoustic communication in the last two decades. The first occurred in the early 1980's with the introduction of digital signaling techniques 1....