Results 41 to 50 of about 32,263 (311)

Pseudo channel reciprocity in FDD satellite channels

, 2023
Channel reciprocity can significantly reduce the overhead of obtaining channel-state information at the transmitter (CSIT). However, true reciprocity only exists in time division duplex (TDD). In this paper, we propose a novel tracking method that exploits implicit reciprocity in FDD line-of-sight (LOS) channels as in low-earth-orbit (LEO) satellite ...
Richter, Rei, Bergel, Itsik, Noam, Yair, Zehavi, Ephi   +3 more
openaire   +2 more sources

On the Integration of Random Access and DAMA Channels for the Return Link of Satellite Networks

, 2013
Recent advances in Random Access (RA), improving throughput and loss rates, make the usage of such technique particularly interesting to complement Demand Assigned Multiple Access (DAMA) channels for the return link of satellite systems.
Munari, Andrea, Kissling, Christian, Christian Kissling, Andrea Munari Dlr   +3 more
core   +1 more source

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, Anton Donner, Kißling, Christian, Donner, Anton, Hermenier, Romain, Christian Kissling   +5 more
core   +1 more source

Evaluation of cross-layer reliability mechanisms for satellite digital multimedia broadcast [PDF]

, 2007
This paper presents a study of some reliability mechanisms which may be put at work in the context of Satellite Digital Multimedia Broadcasting (SDMB) to mobile devices such as handheld phones.
Bazile, Caroline, Scot, Gaël, Kieffer, Michel, Sabeva, Galina, Lacan, Jérôme, Bouabdallah, Amine, Duhamel, Pierre, Sabeva, G., Scot, G., Bazile, C.   +9 more
core   +1 more source

STRATEGIC ENVIRONMENTAL ANALYSIS OF THE IMPACT OF ENVIRONMENTAL PROGRAMS IN RAISING AWARENESS TO REDUCE ENVIRONMENTAL RISKS AN APPLIED STUDY ON EGYPTIAN SATELLITE CHANNELS [PDF]

Journal of Environmental Science
The research aimed to identify the importance of strategic environmental analysis of the impact of environmental programs in raising environmental awareness and reducing environmental risks on Egyptian satellite channels, as well as identifying the role ...
Mona A Iraqi, Hoda Ibrahim Ahmed, Nermin A. Singer, Abu Bakr Bakhit   +3 more
doaj   +1 more source

On the Achievable Rates for the Return-Link of Multi-Beam Satellite Systems Using Successive Interference Cancellation

, 2011
This paper investigates the theoretically reachable rates in the return-link of multi-user multi-beam satellite systems. The return-link can actually be analyzed by means of multiple-input multiple-output signal processing techniques. While MIMO inspired
Michael Joham, Matteo Berioli, Rossetto, Francesco, Francesco Rossetto, Boussemart, Vincent, Berioli, Matteo, Joham, Michael, Vincent Boussemart   +7 more
core   +1 more source

Parallel Blind Adaptive Equalization of Improved Block Constant Modulus Algorithm With Decision-Directed Mode

IEEE Access, 2023
To eliminate inter-symbol interferences (ISI) caused by nonlinear group delay effect in high-speed broadband satellite sensor networks, an efficient parallel adaptive blind equalization of improved block constant modulus algorithm (IBCMA) with decision ...
Ying Chen, Geqi Weng, Shenji Luan, Yanhai Shang, Chao Liu, Jianrong Bao   +5 more
doaj   +1 more source

OFDM receiver for fixed satellite channel

Journal of Communications and Networks, 2010
This paper proposes an orthogonal frequency division multiplexing (OFDM) waveform for the forward link of a fixed broadband satellite system. We focus on the synchronization tasks in the receiver. Our objective is to minimize the required overhead, in order to improve the spectral efficiency with regard to a single carrier waveform system.
Nathalie Thomas, Marie-Laure Boucheret, Anh Tai Ho, Mathieu Dervin, Xavier Deplancq   +4 more
openaire   +1 more source

Physical layer DVB-SH performance prediction based on mutual information [PDF]

, 2012
Digital Video Broadcasting-Satellite Handled (DVB-SH) is a hybrid satellite terrestrial broadcasting standard dedicated to provide video or audio services for handheld terminals.
Chauvet, Wilfried, Amiot-Bazile, Caroline, J. Lacan, B. Ros, Lacan, Jérôme, F. Lacoste, C. Amiot‐Bazile, Lacoste, Frédéric, Ros, Benjamin, W. Chauvet   +9 more
core   +1 more source

In vitro and in silico modelling of ROS1‐positive non‐small cell lung cancer reveals fusion‐dependent tyrosine kinase inhibitor responses

Molecular Oncology, EarlyView.
Drug resistance limits treatment success in a subset of lung cancers driven by ROS1 gene alterations. Using patient‐derived cells and computer simulations, we studied three key mutations and how they affect five targeted drugs. The mutations reduced drug effectiveness in different ways by altering protein structure and behavior.
Farhan Ul Haq, Marc Terrones, Felicia Rodrigues Fortes, Anne Schepers, Alessia Denis, Christophe Deben, Ken Op de Beeck, Guy Van Camp, Geert Vandeweyer   +8 more
wiley   +1 more source