Results 241 to 250 of about 522,559 (296)

The indoor radio propagation channel

Proceedings of the IEEE, 1993
In this tutorial survey the principles of radio propagation in indoor environments are reviewed. The channel is modeled as a linear time-varying filter at each location in the three-dimensional space, and the properties of the filter's impulse response are described. Theoretical distributions of the sequences of arrival times, amplitudes and phases are
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Propagation in channels

SPIE Proceedings, 2013
We describe how one can obtain the phase space differential equation for joint position-wavenumber distributions for pulse propagation with dispersion and attenuation. We show that there are many advantages to the phase space equation both from the point of view of insight and practical calculation. We use the method to obtain new approximations for
J. S. Ben-Benjamin, L. Cohen
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Microwave Propagation on Acupuncture Channels

Acupuncture & Electro-Therapeutics Research, 2006
Quantitative studies on functional state of acupuncture points and meridians have been done mostly by electrical measurement that requires the contact of the electrode on skin and is subject to pressure, humidity, etc. In this study, a new modality of using microwave was investigated.
Michael A, Krevsky, Ekaterina S, Zinina, Yuri, Koshurinov, Aleck M, Ovechkin, Yuri A, Tkachenko, Wantaek, Han, Sang-Min, Lee, Gilwon, Yoon   +7 more
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Propagation channel cluster characteristics

2007 IEEE Antennas and Propagation Society International Symposium, 2007
In this paper, propagation channel cluster characteristics, such as azimuth angle spread, lifetimes, and polarization properties, were analysed. All the analysed data was measured in typical urban microcellular environment, and the parameters of the clusters were extracted manually after beamforming processing. The AS difference between LOS and NLOS in
Veli-Matti Kolmonen, Jari Salo, Lasse Vuokko, Pertti Vainikainen   +3 more
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Flame Propagation in Channels: Steady and Pulsating Propagation

42nd AIAA Aerospace Sciences Meeting and Exhibit, 2004
The structure, dynamics and stability of twodimensional ∞ame fronts propagating in channels of arbitrary width is studied, accounting for heat losses by conduction to the walls, an imposed Poiseuille ∞ow and difierential difiusion efiects. Our primary objective is to determine within the ∞ammable regions, the conditions that result in steady ...
Moshe Matalon, Changrong Cui, Thomas Jackson   +2 more
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Microcellular radio-channel propagation prediction

IEEE Antennas and Propagation Magazine, 1994
Designers of wireless-communications networks require detailed understanding of radio-propagation in complicated, multi-path channels. Unlike conventional cellular systems, emerging wireless personal-communication networks will most likely operate in confined, urban environments (microcells).
K.R. Schaubach, N.J. Davis
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MIMO Propagation Channel Modeling

IEICE Transactions on Communications, 2005
This paper provides an overview of research in channel modeling for multiple-input multiple-output (MIMO) data transmission focusing on a radio wave propagation. A MIMO channel is expressed as an equivalent circuit with a limited number of eigenpaths according to the singular-value decomposition (SVD).
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Asymmetrical sound channel axis propagation

The Journal of the Acoustical Society of America, 1975
An acoustic experiment was conducted utilizing the asymmetrical sound channel axis propagation paths of the Mediterranean within the Algero-Provencal Basin. Acoustic transmission loss in 94-Hz bands from 94 to 2250 Hz was obtained as a function of range using shipboard deployed explosive caps, half and one pound charges, and a fixed receiver in the ...
J. Cybulski, E. B. Wright
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