Results 11 to 20 of about 429,759 (317)
Survey of Inter-satellite Communication for Small Satellite Systems: Physical Layer to Network Layer View [PDF]
arXiv, 2016 Small satellite systems enable whole new class of missions for navigation, communications, remote sensing and scientific research for both civilian and military purposes. As individual spacecraft are limited by the size, mass and power constraints, mass-produced small satellites in large constellations or clusters could be useful in many science ...
Afghah, Fatemeh +5 more
arxiv +6 more sources
Treatment planning with a 2.5 MV photon beam for radiation therapy
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose The shallow depth of maximum dose and higher dose fall‐off gradient of a 2.5 MV beam along the central axis that is available for imaging on linear accelerators is investigated for treatment of shallow tumors and sparing the organs at risk (OARs) beyond it.
Navid Khaledi +5 more
wiley +1 more source
IEEE Access, 2018 Multicarrier faster-than-Nyquist (MFTN) is a spectral efficient transmission scheme for future communication systems. However, as one of the most important drawbacks of multicarrier transmission systems, the peak-to-average power ratio (PAPR) of MFTN ...
Aijun Liu +5 more
doaj +1 more source
On the virtualization and dynamic orchestration of satellite communication services [PDF]
, 2016 Key features of satellite communications such as wide-scale coverage, broadcast/multicast support and high availability, together with significant amounts of new satellite capacity coming online, anticipate new opportunities for satellite communications ...
Ahmed, Toufik +8 more
core +2 more sources
The Steward Observatory LEO Satellite Photometric Survey [PDF]
PASP 135 095003 (2023), 2023 The Steward Observatory LEO Satellite Photometric Survey is a comprehensive observational survey to characterize the apparent brightness of the Starlink and OneWeb low Earth orbit satellites and evaluate the potential impact on astronomy. We report the results of over 16,000 independent measurements of nearly 2800 individual satellites.
arxiv +1 more source
Experimental Satellite Quantum Communications [PDF]
, 2014 Quantum Communications on planetary scale require complementary channels including ground and satellite links. The former have progressed up to commercial stage using fiber-cables, while for satellite links, the absence of terminals in orbit has impaired
Bacco, Davide +6 more
core +2 more sources
Hexagonal Multicarrier Faster-Than-Nyquist Signaling
IEEE Access, 2017 Multicarrier faster-than-Nyquist (MFTN) signaling is a spectral efficient modulation scheme for future communication systems. In MFTN signaling, the intersymbol interference (ISI) and intercarrier interference (ICI) are introduced intentionally by the ...
Siming Peng +3 more
doaj +1 more source
PAPR Reduction of Multicarrier Faster-Than-Nyquist Signals With Partial Transmit Sequence
IEEE Access, 2017 Multicarrier faster-than-Nyquist (MFTN) signaling is a spectral efficient transmission scheme for future communication systems. Similar as general multicarrier signals, the high peak-to-average power ratio (PAPR) is also one of the main drawbacks of MFTN
Siming Peng +3 more
doaj +1 more source
A Parallel Decoding Algorithm for Short Polar Codes Based on Error Checking and Correcting
The Scientific World Journal, 2014 We propose a parallel decoding algorithm based on error checking and correcting to improve the performance of the short polar codes. In order to enhance the error-correcting capacity of the decoding algorithm, we first derive the error-checking equations
Yingxian Zhang +4 more
doaj +1 more source
IEEE Access, 2018 High peak-to-average power ratio (PAPR) is one of the common drawbacks of multicarrier signals at the transmitter. In this paper, we investigate the PAPR reduction of spectral efficient multicarrier faster-than-Nyquist (MFTN) signals, where the PAPR ...
Siming Peng +4 more
doaj +1 more source