Results 51 to 60 of about 63,188 (310)
Advanced Functional Materials, EarlyView.This study highlights the integration of stable two‐dimensional covalent organic framework (COF) films as photoactive layers in hybrid nanoenergy devices. The results demonstrate their capacity to generate electricity under both sunny and rainy conditions, showcasing versatility and resilience.
Joab D. Guerrero +13 more
wiley +1 more source
Novel Results on SNR Estimation for Bandlimited Optical Intensity Channels
Sensors, 2023 In a previous work of the author about non-data-aided estimation of the signal-to-noise ratio (SNR) for bandlimited optical intensity channels, a couple of limitations have been identified in terms of error performance and computational complexity.
Wilfried Gappmair
doaj +1 more source
The Marshall Islands : history, culture and communication [PDF]
, 1980 "Draft: Not for Quotation, Citation or Reproduction without Permission of Author."For more about the East-West Center, see https://www.eastwestcenter.org/Policy decisions about communication system resources are an important part of controlled ...
Runeborg, Ruth E. +1 more
core
Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization
Advanced Functional Materials, EarlyView.We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat +3 more
wiley +1 more source
Non-Data-Aided SNR Estimation for Bandlimited Optical Intensity Channels
Sensors, 2023 Powerful and reliable estimation of transmission parameters is an indispensable task in each receiver unit—not only for radio frequency, but also for optical wireless communication systems.
Wilfried Gappmair
doaj +1 more source
Investigation of the effects of cloud attenuation on satellite communication systems [PDF]
, 2012 The aim of this project is to investigate the attenuation due to clouds at 20- 50GHz; to develop an accurate long-term prediction model of cloud attenuation applicable to slant-path links and evaluate the impact of cloud attenuation dynamics on the ...
Alawadi, Tareq A.
core
A delay model for satellite constellation networks with inter-satellite links
, 2009 Within this paper we examine a non-geostationary satellite constellation network with inter-satellite links (ISLs) for global air traffic control (ATC) and air passenger communication (APC).
Romain Hermenier +5 more
core +1 more source
Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics
Advanced Materials, EarlyView.The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades +7 more
wiley +1 more source
IEEE Open Journal of Vehicular TechnologyThis paper proposes a long range-frequency hopping spread spectrum (LR-FHSS) transceiver design for the Direct-to-Satellite Internet of Things (DtS-IoT) communication system.
Sooyeob Jung +7 more
doaj +1 more source
Data-Aided SNR Estimation for Bandlimited Optical Intensity Channels
Sensors, 2022 Not only for radio frequency but also for optical communication systems, knowledge of the signal-to-noise ratio (SNR) is essential, e.g., for an adaptive network, where modulation schemes and/or error correction methods should be selected according to ...
Wilfried Gappmair
doaj +1 more source