Results 51 to 60 of about 136,581 (191)

Material Characterization and Propagation Analysis of mm-Waves Indoor Networks

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper reports detailed propagation analyses of mm-wave indoor networks based numerical simulations of the wireless coverage and measurements of the propagation coefficient at 28 and 38 GHz.
A. Fagiani, M. Vogel, Arismar Cerqueira S. Jr.   +2 more
doaj   +1 more source

Achievable directive antenna gain measurements and modeling for 60 GHz indoor links

Scientific Reports
Highly directive antennas may be a key component in millimeter wave links to offset their inherently high path losses. In cluttered scenarios such as Non-Line-Of-Sight (NLOS) indoor settings, antenna gain is degraded by the interaction of the channel ...
Sebastián Bruna, Mauricio Rodríguez, Rodolfo Feick, Francisco Pizarro, Reinaldo Valenzuela, Jinfeng Du, Dmitry Chizhik, Jakub Sapis, Sergio Chapana   +8 more
doaj   +1 more source

Distributed Local Linear Parameter Estimation using Gaussian SPAWN [PDF]

, 2014
We consider the problem of estimating local sensor parameters, where the local parameters and sensor observations are related through linear stochastic models. Sensors exchange messages and cooperate with each other to estimate their own local parameters
Leng, Mei, Quek, Tony Q. S., Shin, Hyundong, Tay, Wee Peng   +3 more
core   +1 more source

Multi-ray channel modeling for programmable wireless environments in the terahertz band

Tongxin xuebao, 2019
Terahertz communication system based on programmable wireless environment allowed programming customization of electromagnetic wave propagation in the most suitable ways for different wireless devices.It could not only improve serious fading,interference
Wenyu LUO, Hechao LIU
doaj   +2 more sources

Spectroscopic analysis of interaction between an EIT wave and a coronal upflow region

, 2011
We report a spectroscopic analysis of an EIT wave event that occurred in active region 11081 on 2010 June 12 and was associated with an M2.0 class flare. The wave propagated near circularly.
Asai, Attrill, Attrill, Biesecker, Chen, Chen, Chen, Chen, Chen, Chen, Cliver, Cohen, Dai, Delannée, Doschek, F. Chen, Gopalswamy, Hara, Harra, Harra, Harra, Kienreich, L. K. Harra, Liu, Long, M. D. Ding, Ma, McIntosh, McIntosh, Okamoto, P. F. Chen, Patsourakos, Thompson, Title, Veronig, Veronig, Wang, Wang, Warmuth, Warmuth, Wills-Davey, Young   +41 more
core   +1 more source

Non-line-of-sight polarized single-scatter propagation model for noncoplanar geometries

, 2012
This paper has been withdrawn by the ...
Yin, Hongwei, Zhang, Hailiang, Jia, Honghui, Luo, Jianfeng, Chang, Shengli, Yang, Juncai   +5 more
openaire   +2 more sources

A Propagation Condition Identification and Non-Line of Sight Error Mitigation Algorithm in Wireless Sensor Network

Journal of Physics: Conference Series, 2020
Abstract Node localization is one of key technologies in wireless sensor networks (WSN). In practice, the occlusion of obstacles often leads to large non-line-of-sight (NLOS) error. Therefore, the misidentification of LOS (line-of-sight)/NLOS conditions can seriously reduce the accuracy of localization algorithms in WSN.
Hao chu, Siyi Lian, Hao Yang, Rongguang Wu   +3 more
openaire   +1 more source

Investigation of Time-Reversal Based Far-Field Wireless Power Transfer From Antenna Array in a Complex Environment

IEEE Access, 2020
The performance of time-reversal (TR) based far-field wireless power transfer (WPT) from an antenna array in a complex propagation environment is investigated in comparison with conventional array-based beamforming (BF).
Hong Soo Park, Sun K. Hong
doaj   +1 more source

Multi-layer study of wave propagation in sunspots

, 2010
We analyze the propagation of waves in sunspots from the photosphere to the chromosphere using time series of co-spatial Ca II H intensity spectra (including its line blends) and polarimetric spectra of Si I 10827 and the He I 10830 multiplet.
Bard, Bellot Rubio, Bloomfield, Bogdan, C. Beck, Cally, Carlsson, Centeno, Centeno, Centeno, Collados, E. Khomenko, Felipe, Hindman, Khomenko, Khomenko, Lites, Lites, M. Collados, T. Felipe   +19 more
core   +1 more source

Study on the Propagation Characteristics of Radio Wave for Indoor Non-Line-of-Sight

Journal of Computer and Communications, 2015
The propagation characteristics of radio wave have been an important topic in wireless communications. Based on the ray tracing method, the propagation of radio wave for indoor NLOS environment is simulated and analyzed. In this paper, the received power is obtained by simulation, and we will analyze the impact of various factors on the received power.
Feng Chen, Yuanjian Liu, Pengfei Wang
openaire   +2 more sources