Results 51 to 60 of about 2,411,897 (179)

A Versatile Propagation Channel Simulator for MIMO Link Level Simulation

EURASIP Journal on Wireless Communications and Networking, 2007
This paper presents a propagation channel simulator for polarized bidirectional wideband propagation channels. The generic channel model implemented in the simulator is a set of rays described by geometrical and propagation features such as the delay, 3D
Jean-Marc Conrat, Patrice Pajusco
doaj   +2 more sources

Estimates of Magnetic Field Strength in the Solar Corona Using Observations of Thermal Radio Emission at Low Frequencies

The Astrophysical Journal
Measurements of the magnetic field strength in the solar corona at heliocentric distances r  ≳  1.1 R _⊙ , using observations other than transient radio bursts, are rare.
Sayuf Shaik, C. Kathiravan, R. Ramesh
doaj   +1 more source

A Novel Ray Tracing Approach for Bathymetry Using UAV-Based Dual-Polarization Photon-Counting LiDAR

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Unmanned aerial vehicle-based photon-counting ocean bathymetric light detection and ranging (LiDAR) systems rapidly acquire topographic data from islands, reefs, and shallow waters.
Kuifeng Luan, Xueyan Zhao, Wei Kong, Tao Chen, Huan Xie, Xiangfeng Liu, Fengxiang Wang   +6 more
doaj   +1 more source

A FORMALISM FOR COVARIANT POLARIZED RADIATIVE TRANSPORT BY RAY TRACING

The Astrophysical Journal, 2012
We write down a covariant formalism for polarized radiative transfer appropriate for ray tracing through a turbulent plasma. The polarized radiation field is represented by the polarization tensor (coherency matrix) N{sup {alpha}{beta}} {identical_to} (a{sup {alpha}}{sub k} a*{sup {beta}}{sub k}), where a{sub k} is a Fourier coefficient for the vector ...
Charles F. Gammie, Po Kin Leung
openaire   +1 more source

Analysis and ray-tracing modelling of co- and cross-polarization radio propagation in urban environment

, 2007
The co- and cross-polarization behaviour of the urban propagation channel has been studied through both MIMO measurements and ray tracing (RT) simulation.
V. M. Kolmonen, VITUCCI, ENRICO MARIA, FUSCHINI, FRANCO, DEGLI ESPOSTI, VITTORIO, P. Vainikainen, V. Degli-Esposti, E. Vitucci, F. Fuschini, V.-M. Kolmonen   +8 more
core   +1 more source

High-Fidelity Near-Field mmWave MIMO Radar Simulation via Polarized Path Tracing

IEEE Journal of Microwaves
Accurate simulation of near-field millimeter-wave (mmWave) multiple-input multiple-output (MIMO) radars is essential for developing and validating high-resolution imaging systems, yet remains challenging due to large virtual apertures, multi-path ...
Nikolai Hofmann, Vanessa Wirth, Florian Gutsche, Ingrid Ullmann, Tim Weyrich, Martin Vossiek, Marc Stamminger   +6 more
doaj   +1 more source

Recent Upgrading of ECRH System and Studies to Improve ECRH Performance in the LHD

EPJ Web of Conferences, 2015
This paper reports the recent status of the ECRH system in the LHD and introduces the experimental results that suggest the reasonable effects of the wave-plasma interaction in the plasma boundary including outside the LCFS. With increasing the available
Igami Hiroe, Kubo Shin, Shimozuma Takashi, Yoshimura Yasuo, Takahashi Hiromi, Kamio Shuji, Kobayashi Sakuji, Ito Satoshi, Mizuno Yoshinori, Okada Kohta, Makino Ryohei, Ogasawara Shinya, Kobayashi Kenya, Osakabe Masaki, Nagasaki Kazunobu, Idei Hiroshi, Mutoh Takashi   +16 more
doaj   +1 more source

Probing observable features of Lorentz violation in low-energy Hořava gravity with accretion disk images of black hole

European Physical Journal C: Particles and Fields
In this paper, we study the observable signatures of Lorentz violation (LV) in low-energy Hořava gravity by simulating the images and polarization features of rotating LV black holes using a backward ray-tracing method. Within a thin-disk accretion model
Meng-Die Zhao, Yu-Yan Wang, Ke-Jian He, Guo-Ping Li   +3 more
doaj   +1 more source

Polarized emission of orbiting hot spots near Sagittarius A*

Astronomy & Astrophysics
We investigated the polarimetric signatures of orbiting hot spots around a Schwarzschild black hole in the presence of an external magnetic field, accounting for the electromagnetic interaction between the charged emitter and the field.
Tlemissov Abylaikhan, Tursunov Arman, Wielgus Maciek   +2 more
doaj   +1 more source

Polarization Characteristics of Massive HVI Debris Clouds Using an Improved Monte Carlo Ray Tracing Method for Remote Sensing Applications

Remote Sensing
As a signature phenomenon of massive hypervelocity impacts (HVIs) in space, debris clouds provide critical optical information for satellite remote sensing and the assessment of large-scale impacts.
Guangsen Liu, Peng Rao, Yao Li, Wen Sun
doaj   +1 more source