Results 151 to 160 of about 4,630 (180)

Influence of multipath propagation on UWB imagery

2008 IEEE International Conference on Ultra-Wideband, 2008
In this paper the influence of multipath propagation on the quality of UWB imagery is analyzed. Typical UWB imaging methods like time domain migration consider only propagation paths with one reflection at the object of interest. In most scenarios the paths of higher order are attenuated sufficiently to neglect them.
Malgorzata Porebska, Christian Sturm, Jens Timmermann, Thomas Zwick, Werner Wiesbeck   +4 more
openaire   +1 more source

Spatial matched processing for multipath propagation

The Journal of the Acoustical Society of America, 1987
Underwater acoustic propagation is characterized by multipath or multimode propagation. Ray theory and mode theory are not fully adequate for modeling physical reality. Impulse responses can be more accurately calculated using Gaussian beam theory.
Matthew Dzieciuch, T. G. Birdsall
openaire   +1 more source

Multipath fading of on-body propagation channels

2008 IEEE Antennas and Propagation Society International Symposium, 2008
It was shown that multipath fading of an on-body channel can be characterized by a Rician distribution. The parameters of the Rican distribution for two on-body channels were extracted and their behavior during walking movement in an office and in an anechoic chamber was analyzed.
Y.I. Nechayev, P.S. Hall
openaire   +1 more source

Reverberation for Multipath Propagation in Urban Areas

The Journal of the Acoustical Society of America, 1973
The propagation of urban noise combines the transmission phenomena of reflection, scattering, and shielding to produce sound levels that are substantially different from those that would exist in an open terrain situation. When the source is elevated, the number of important contributing paths is generally less than four or five, and the reverberation ...
openaire   +1 more source

Raypath parameters in tropospheric multipath propagation

IEEE Transactions on Antennas and Propagation, 1982
An analytic approach tO the modeling of refractivity profiles, together with ray-tracing considerations, is discussed with a view to providing relevant information regarding path parameters in a multipath situation. Some points arising from rays launched from within an elevated duct are raised and discussed.
openaire   +1 more source

A Statistical Model for Indoor Multipath Propagation

2009
The results of indoor multipath propagation measurements using 10 ns, 1.5 GHz, radarlike pulses are presented for a medium-size office building. The observed channel was very slowly time varying, with the delay spread extending over a range up to about 200 ns and rms values of up to about 50 ns. The attenuation varied over a 60 dB dynamic range.
openaire   +1 more source

Multipath Propagation

IEEE Communications Magazine, 1984
openaire   +1 more source

Propagation Characteristics of Acoustic Emission Signals in Stiffened Cylindrical Shells Based on the Multipath Propagation Model

Applied Sciences (Switzerland), 2021
Guoan Yang
exaly  

Radar clutter and multipath propagation

IEE Proceedings F Radar and Signal Processing, 1991
openaire   +1 more source

Analysis of spherical propagation models for multipath-propagation predictions

International Journal of Physics and Applications, 2020
openaire   +1 more source