Results 11 to 20 of about 1,252,380 (279)
Distributed Spectrum Access with Spatial Reuse [PDF]
IEEE Journal on Selected Areas in Communications, 2013 Efficient distributed spectrum sharing mechanism is crucial for improving the spectrum utilization. The spatial aspect of spectrum sharing, however, is less understood than many other aspects. In this paper, we generalize a recently proposed spatial congestion game framework to design efficient distributed spectrum access mechanisms with spatial reuse.
Chen, Xu, Huang, Jianwei
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Learning Temporal–Spatial Spectrum Reuse [PDF]
IEEE Transactions on Communications, 2016 We formulate and study a multi-user multi-armed bandit problem that exploits the temporal–spatial opportunistic spectrum access (OSA) of primary user (PU) channels, so that secondary users (SUs) who do not interfere with each other can make use of the same PU channel. We first propose a centralized channel allocation policy that has logarithmic regret,
Zhang, Yi +4 more
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Spatially Resolved Spectrum of the Vela PWN [PDF]
Symposium - International Astronomical Union, 2004 A series of 13 Chandra observations has provided the deepest images of the Vela PWN yet available. In addition to the fine structure of the inner PWN features, a much larger and fainter asymmetric X-ray nebula emerges in the summed images. The shape of this outer PWN is similar to that of the radio PWN.
Kargaltsev, Oleg, Pavlov, George
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Differential Effects of Orientation and Spatial-Frequency Spectra on Visual Unpleasantness
Frontiers in Psychology, 2020 Increasing psychophysical evidence suggests that specific image features – or statistics – can appear unpleasant or induce visual discomfort in humans. Such unpleasantness tends to be particularly profound if the image’s amplitude spectrum deviates from ...
Narumi Ogawa, Isamu Motoyoshi
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Relativistic approach to electromagnetic imaging [PDF]
, 2004 A novel imaging principle based on the interaction of electromagnetic waves with a beam of relativistic electrons is proposed. Wave-particle interaction is assumed to take place in a small spatial domain, so that each electron is only briefly accelerated
Bertrand +9 more
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IEEE Access, 2023 The two-dimensional optimization capability of the space-time minimum variance distortionless response (STMVDR) can improve the spatial spectrum estimation performance of the broadband beamformer with limited samples, but its high sensitivity to ...
Yang Wang +3 more
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Modally Resolved Fabry-Perot Experiment with Semiconductor Waveguides [PDF]
, 2015 Based on the interaction between different spatial modes, semiconductor Bragg-reflection waveguides provide a highly functional platform for non-linear optics.
Geßler, J. +7 more
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Spatially Resolved Dynamic Eigenmode Spectrum of Co Rings [PDF]
Physical Review Letters, 2006 The spatially resolved eigenmode spectrum of micrometer-sized Co ring elements has been determined by means of combined vector network analyzer ferromagnetic resonance and time resolved magneto-optic Kerr effect measurements. Up to 5 resonant eigenmodes were observed in the frequency range from 45 MHz to 20 GHz as a function of an external magnetic ...
Neudecker, Ingo +8 more
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Spatial drivers of instability in marine size-spectrum ecosystems [PDF]
Journal of Theoretical Biology, 2021 Size-spectrum models are a recent class of models describing the dynamics of a whole community based on a description of individual organisms. The models are motivated by marine ecosystems where they cover the size range from multicellular plankton to the largest fish. We propose to extend the size-spectrum model with spatial components.
Xu, Nuo +4 more
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Reconfigurable optical spectra from perturbations on elliptical whispering gallery resonances [PDF]
, 2008 Elastic strain, electrical bias, and localized geometric deformations were applied to elliptical whispering-gallery-mode resonators fabricated with lithium niobate. The resultant perturbation of the mode spectrum is highly dependant on the modal indices,
Maleki, Lute, Mohageg, Makan
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