Results 1 to 10 of about 4,356,268 (297)

Compressive Sensing Based Radio Tomographic Imaging with Spatial Diversity [PDF]

open access: yesSensors, 2019
Radio tomographic imaging (RTI) has emerged as a promising device-free localization technology for locating the targets with no devices attached. RTI deduces the location information from the reconstructed attenuation image characterizing target-induced ...
Shengxin Xu   +3 more
doaj   +2 more sources

A Remote Sensing Approach to Understanding Patterns of Secondary Succession in Tropical Forest

open access: yesRemote Sensing, 2021
Monitoring biodiversity on a global scale is a major challenge for biodiversity conservation. Field assessments commonly used to assess patterns of biodiversity and habitat condition are costly, challenging, and restricted to small spatial scales.
Eric Chraibi   +5 more
doaj   +1 more source

Multiple Transmitters for Gain Saturated Pre-Amplified FSO Communication Systems Limited by Strong Atmospheric Turbulence and Pointing Error

open access: yesIEEE Access, 2023
The use of multiple transmitters in a turbulent free-space optical (FSO) communication link can enhance the systems performance because greater received power can improve receiver sensitivity. Nevertheless, the effect of having more power at the receiver
Jeremiah Oluwatosin Bandele   +3 more
doaj   +1 more source

Origami Microwave Imaging Array: Metasurface Tiles on a Shape‐Morphing Surface for Reconfigurable Computational Imaging

open access: yesAdvanced Science, 2022
Origami is the art of paper folding that allows a single flat piece of paper to assume different 3D shapes depending on the fold patterns and the sequence of folding.
Suresh Venkatesh   +4 more
doaj   +1 more source

Analysis of Zagros forest structure using neighborhood-based indices (Case study: Ghalehgol forest, Khorramabad) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2014
Analysis of forest structure is essential for enhanced understanding of forest ecology and management. In this study, the spatial structure of the existing species in Perk district of Ghaleh Gol site in Lorestan Province was explored.
Peiman Farhadi   +3 more
doaj   +1 more source

Performance Analysis of Uplink NOMA With Constellation–Rotated STLC for IoT Networks

open access: yesIEEE Open Journal of the Communications Society, 2022
We investigate the uplink non-orthogonal multiple access (NOMA)-based Internet-of-Things (IoT) networks, where each IoT device (station: STA) equipped with a single antenna exploits the constellation-rotated space-time line code (CR-STLC) to send signals
Ki-Hun Lee   +3 more
doaj   +1 more source

Quantitative analysis of the spatial diversity of Moraceae in China

open access: yesFrontiers in Ecology and Evolution, 2023
Changes in distribution patterns of economically essential forest species under global change are urgently needed in the scientific forecast, and large-scale spatial modeling is a crucial tool.
Dangui Lu   +5 more
doaj   +1 more source

Optimized Scheme of Antenna Diversity for Radio Wave Coverage in Tunnel Environment

open access: yesIEEE Access, 2020
To suppress the deep fading of radio waves caused by the tunnel waveguide effect, this paper presents an optimized scheme for the spatial and polarization diversities of tunnel antennas.
Zhenyu Zhao   +4 more
doaj   +1 more source

Contemporary Processes of Concentration and Specialization of Industrial Activity in Post-Socialist States as Illustrated by the Case of Wrocław and Its Suburbs (Poland)

open access: yesLand, 2021
This paper explores the issues of contemporary spatial differentiation in the process of industry concentration and the accompanying specialization according to the intensity of research and development in urban agglomerations, as exemplified by Wrocław ...
Dominik Sikorski, Paweł Brezdeń
doaj   +1 more source

Dynamic Spatial Diversity Combiner pada Kanal Fading

open access: yesJurnal Elkomika, 2019
ABSTRAK Kanal transmisi radio berkontribusi pada terjadinya efek fading yang dapat berpengaruh pada terjadinya penurunan kualitas sinyal pada penerima.
DWI ARYANTA, RIENZY PRATAMA LONDONG ALLO
doaj   +1 more source

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