Results 31 to 40 of about 5,413 (290)

Vulnerability of Satellite Quantum Key Distribution to Disruption from Ground-Based Lasers

Sensors, 2021
Satellite-mediated quantum key distribution (QKD) is set to become a critical technology for quantum-secure communication over long distances. While satellite QKD cannot be effectively eavesdropped, we show it can be disrupted (or ‘jammed’) with ...
David R. Gozzard, Shane Walsh, Till Weinhold   +2 more
doaj   +1 more source

A Survey on Laser Space Network: Terminals, Links, and Architectures

IEEE Access, 2022
Due to the high directionality and short wavelength of laser transmission in space, satellite laser communication can achieve high speed, wide bandwidth, high precision, and high security with no electromagnetic spectrum constraints.
Rui Li, Baojun Lin, Yingchun Liu, Mingji Dong, Shuai Zhao   +4 more
doaj   +1 more source

Satellite Downlink Coherent Laser Communications

, 2016
Peer ...
Belmonte Molina, Aniceto, Kahn, J. M.
openaire   +3 more sources

Optical High-Capacity Satellite Downlinks via High-Altitude Platform Relays

, 2007
Earth-observation (EO) satellite missions produce a large amount of data using high-resolution optical or radar sensors. During the last decades the amount of data has steadily increased due to improved sensor technologies with increased temporal ...
Florian Moll, Bischl, Hermann, Markus Knapek, Giggenbach, Dirk, Joachim Horwath, Horwath, Joachim, Courville, Nicolas, Knapek, Markus, Bernd Epple, Moll, Florian, Nicolas Courville, Hermann Bischl, Epple, Bernhard, Dirk Giggenbach   +13 more
core   +1 more source

Analysis and evaluation of optimum wavelengths for free-space optical transceivers [PDF]

, 2010
The objective of this paper is to analyse and present the latest results obtained for free-space optics (FSO) within the EU COST Action IC-0802 and within the European Space Agency (ESA) contract.
Z. Ghassemlooy, E. Leitgeb, M. S. Awan, M. Wittig, T. Plank, Wittig, Manfred, Plank, Thomas, Ozek, Faruk, Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, F. Ozek, P. Brandl, Awan, Muhammad, Brandl, Paul, Leitgeb, Erich, W. Popoola   +15 more
core   +1 more source

Optical Free-Space Communication on Earth and in Space regarding Quantum Cryptography Aspects

, 2010
Mobile FSO Communication links have gained signi cant at- tention over the last years due to their increasing maturity. They are used in point to point link scenarios where the high gain in power efficiency and datarate is crucial, compared to state-of ...
Fuchs, Christian, Giggenbach, Dirk, Christian Fuchs, Dirk Giggenbach   +3 more
core   +1 more source

A security performance detection method for satellite space laser communication network based on transformer

Frontiers in Physics
The satellite space laser communication network becomes the core support of the aerospace information interconnection system. However, the dynamic nature of its links and high-dimensional transmission of data poses diverse security threats to the network.
Qing Zhong, Yinghu Wan, Xiaolin Zhu, Juan Zhu, Dejiang Wan, Yang Yu, Yao Jiang   +6 more
doaj   +1 more source

Modulation Format Identification in a Satellite to Ground Optical Wireless Communication Systems Using a Convolution Neural Network

Applied Sciences, 2022
The satellite-to-ground communication system is a significant part of future space communication networks. The free-space optical (FSO) communication technique is a prospective solution for satellite-to-ground communication.
Yucong Gu, Zhiyong Wu, Xueliang Li, Ruotong Tian, Shuang Ma, Tao Jia   +5 more
doaj   +1 more source

MOBILE OPTICAL HIGH-SPEED DATA LINKS WITH SMALL TERMINALS

, 2009
Mobile Optical Free-Space Communication (MFSO) downlinks from observation platforms in low earth orbit or in the atmosphere will allow nearly undetectable high-speed data links with small and low-power laser communication terminals.
Giggenbach, Dirk, D. Giggenbach
core   +1 more source

Natural Biomaterials for Osteochondral Repair: From Source to Strategy

Advanced Healthcare Materials, EarlyView.
Biological origin‐guided overview of natural biomaterials and therapeutic strategies for osteochondral tissue engineering. The circular diagram categorizes representative materials and strategies into plant/algae‐derived, microbial‐derived, animal‐derived, and human‐derived sources, centered on an osteochondral defect repair model.
Hengyu Liu, Hanyang Zhang, Wenbo Yang, Hao Chen, Jincheng Wang, Fei Chang   +5 more
wiley   +1 more source