[PDF] Top 20 Virtual time - reversal in underwater communications. Results on the INTIFANTE'00 Sea trial
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Virtual time - reversal in underwater communications. Results on the INTIFANTE'00 Sea trial
... acoustic communications in waveguides is known to be prone to severe multi- path, which strongly limitates practical transmission rates with actual equalization tech- ...niques. The virtual ... See full document
7
Environmental model-based time-reversal underwater communications
... experimental results of time-reversal communications based on channel identification with pulse compression, `1-norm regularization and environmental ...focalization. The data ... See full document
183
Passive time reversal probe-signal capture optimization for underwater communications
... heuristically in the past [3]. In order to bring time reversal capabilities to a practical modem the problem of time window a priori automatic optimization must be ... See full document
6
Blind ocean acoustic tomography: experimental results on the INTIFANTE'00 data set
... of the sea trial can be found in ...concentrates on two events in particular: event II, along a range- independent(RI) track, towards NW from the receiving vertical line ... See full document
10
Probe timing optimization for time-reversal underwater communications
... of the pTR communi- cation system are identified and their means and powers are derived (a full derivation can be found in ...[13]). In Section III a closed form expression for the pTR output ... See full document
8
INTIFANTE'00 sea trial data report - Events I,II and III
... Under the underwater communications effort, the objective was to test the capabilities of the time-reversal mirror technique at low frequency and at low data ... See full document
53
Time reversal and spatial diversity: issues in a time varying geometry test
... if the same error is made in the TR than in the MFP, then ˆ G = G 0 and the performance ratio Λ TR/MFP is always ≤ 1, while in the no error case, ˆ G = G 0 = G, we ... See full document
8
A time-reversal suboptimal detector for underwater acoustic barriers
... using the time reversal principle, where the ocean is used as a spatial matched filter, signal energy can be simultaneously focused on each ROA hydrophone and thus obtain the ... See full document
7
Environmental equalizer for underwater communications
... for underwater communications. This algorithm is based on the passive time-reversal (pTR) and waveguide invariant properties of ocean ...Passive time-reversal ... See full document
7
Superimposed training low probability of detection underwater communications
... stability in this time-varying channel, dealing with both variable noise levels, multipath, and ...problem, in particular with low SNR signals. However, as the source and receiver were ... See full document
7
Excitonic instabilities and spontaneous time-reversal symmetry breaking on the honeycomb lattice
... surface. The origin of the instability is closely related to the singularity of the FL polarization function in ...destabilization in two models, both of which stabilizes an ... See full document
8
Effects of the endpoint adjudication process on the results of a randomised controlled trial: the ADVANCE trial.
... of the ADVANCE trial were a composite of major macrovascular events (nonfatal myocardial infarction, nonfatal stroke, or cardiovascular death) and a composite of major microvascular events (new or worsening ... See full document
7
UNDERWATER ACOUSTIC CHANNEL MODELING PROPOSAL FOR SHALLOW WATER COMMUNICATION LINK OPTIMIZATION
... that in shallow water not only the vertical temperature of the ocean is the preponderant parameter as in deep water, Bergmann et ...(1969) on Part 1 Chapter 6 states that ... See full document
14
Effect of Annealing Time for Quenching CuAl7Fe5Ni5W2Si2 Bronze on the Microstructure and Mechanical Properties
... of the current state of knowledge indicates that the microstructure hypoeutectoid aluminum bronze with additions of Fe, Ni, Si and Mn, at ambient temperature, may be present a lot of hard intermetallic ... See full document
18
Performance analysis of multichannel lattice equalization in coherent underwater communications
... ment) sea trial was conducted in the continental shelf off the west coast of Portugal in April 2004, in an area to the north of the Set´ubal Canyon ...[14]. ... See full document
8
J. Microw. Optoelectron. Electromagn. Appl. vol.16 número3
... effective time- reversal (TR) imaging method due to its immunity to the noise and adaptability of complex ...to the Space-frequency MUSIC (SF-MUSIC). In this paper, we propose a novel ... See full document
9
Potential of vertical line array beamforming in underwater acoustic communications
... from the source to the array. The direct arrival (shown in red colour) is the one without any surface or bottom interaction so it is only affected by the source and array ... See full document
8
OFDM demodulation in underwater time-reversed shortned channels
... addresses the problem of OFDM trans- mission in dispersive underwater channels where impulse re- sponses lasting tens of miliseconds cannot be reliably handled by recently proposed methods due to ... See full document
8
Braz. J. Geol. vol.46 número1
... deposition in Antarctica are very dii- cult because of very low concentrations and variability in atmospheric deposition rates (Bigler et ...of the seasonal dust cycle suggested peaks in ... See full document
12
Underwater ecotourism in the Algarve, South of Portugal: implementation and divers' perceptions
... considered the fastest growing market in the tourism industry worldwide, with an annual growth rate of 5% (Taylor et ...2003). In coastal areas, scuba diving and snorkelling (diving without ... See full document
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