Results 61 to 70 of about 351,545 (187)

Free-Space Optical Communication with an Optimized Lipschitz Exponent for Biosignal Telemetry

open access: yesMeasurement Science Review, 2023
Healthcare monitoring is a rapidly developing network in the field of advanced medical treatment. The network combines the ideology of wireless communication, signal processing, medical information and real-time processing units to support the medical ...
Chokkalingam Mathuvanesan   +1 more
doaj   +1 more source

Using Velocity Dispersion to Estimate Halo Mass: Is the Local Group in Tension with $\Lambda$CDM?

open access: yes, 2018
Satellite galaxies are commonly used as tracers to measure the line-of-sight velocity dispersion ($\sigma_{\rm LOS}$) of the dark matter halo associated with their central galaxy, and thereby to estimate the halo's mass.
Elahi, Pascal J.   +4 more
core   +1 more source

SURVEI TOPOGRAFI UNTUK MENENTUKAN GARIS TAMPAK PANDANG BASE TRANSCEIVER STATION (BTS)

open access: yesTeknik, 2012
Base Transceiver Station (BTS) representation one of appliance of supporter of telecommunicationsnetwork. The development of BTS have to each other in circuit by other BTS or which have been planned.The situation BTS in circuit between other BTS without ...
Arief Laila Nugraha, Bambang Sudarsono
doaj   +2 more sources

A Ray-Based Channel Modeling Approach for MIMO Troposcatter Beyond-Line-of-Sight (b-LoS) Communications

open access: yesIEEE Transactions on Communications, 2015
Troposcatter can be used as a communication medium for beyond-Line-of-Sight (b-LoS) links. However, available troposcatter channel models do not provide comprehensive channel modeling especially at high frequencies. Therefore, the main motivation of this study is to develop a ray-based MIMO troposcatter channel model to analyze transmission-loss ...
Ergin Dinc, Ozgur B. Akan
openaire   +4 more sources

A Stochastic Geometry Framework for LOS/NLOS Propagation in Dense Small Cell Networks

open access: yes, 2015
The need to carry out analytical studies of wireless systems often motivates the usage of simplified models which, despite their tractability, can easily lead to an overestimation of the achievable performance.
Doyle, Linda   +3 more
core   +1 more source

NLOS Identification and Positioning Algorithm Based on Localization Residual in Wireless Sensor Networks

open access: yesSensors, 2018
The problem of target localization in WSN (wireless sensor network) has received much attention in recent years. However, the performance of traditional localization algorithms will drastically degrade in the non-line of sight (NLOS) environment ...
Jingyu Hua   +4 more
doaj   +1 more source

Radio frequency-based human activity dataset collected using ESP32 microcontroller in line-of-sight and non-line-of-sight indoor experiment setupsMendeley Data

open access: yesData in Brief
This study presents the “ESP32 Dataset,” a dataset of radio frequency (RF) data intended for human activity detection. This dataset comprises 10 activities carried out by 8 volunteers in three different indoor floor plan experiment setups. Line-of-sight (
Zhe-Yu Lim, Lee-Yeng Ong, Meng-Chew Leow
doaj   +1 more source

Fine-grained wireless propagation ambience sensing

open access: yesInternational Journal of Distributed Sensor Networks, 2018
The ubiquitous wireless network infrastructure and the need of people’s indoor sensing inspire the work leveraging wireless signal into broad spectrum for indoor applications, including indoor localization, human–computer interaction, and activity ...
Nan Jing, Yu Sun, Lin Wang, Jinxin Shan
doaj   +1 more source

A Practical Radiosity Method for Predicting Transmission Loss in Urban Environments

open access: yesEURASIP Journal on Wireless Communications and Networking, 2004
The ability to predict transmission loss or field strength distribution is crucial for determining coverage in planning personal communication systems.
Liang Ming, Liu Qin
doaj   +2 more sources

Line of Sight and Image Motion Compensation for Step and Stare Imaging System

open access: yesApplied Sciences, 2020
In recent years, applications such as marine search and rescue, border patrol, etc. require electro-optical equipment to have both high resolution and precise geographic positioning abilities.
Jihong Xiu   +4 more
doaj   +1 more source

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