Results 21 to 30 of about 35,355 (308)

SatERN: a PEP-less solution for satellite communications [PDF]

, 2011
In networks with very large delay like satellite IPbased networks, standard TCP is unable to correctly grab the available resources. To overcome this problem, Performance Enhancing Proxies (PEPs), which break the end-to-end connection and simulate a ...
Lopez Pacheco, Dino, Emmanuel Lochin, Dino Martin Lopez Pacheco, Tran Thai, Tuan, Lochin, Emmanuel, Arnal, Fabrice, Fabrice Arnal, Lopez-Pacheco, Dino Martin, Tuan Tran Thai   +8 more
core   +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, Aijun Liu, Ke Wang, Xiaohu Liang   +3 more
doaj   +1 more source

A new low profile antenna with improved performance for satellite on-the-move communications [PDF]

, 2009
A novel design solution for a low-profile fullduplex Satellite-On-The-Move Communications hybrid scanned phased array antenna for low elevation angle coverage (down to 10°) is described. The antenna is operated at Ku-Band.
Yuanyuan Jiang, Alistair Sambell, Foti, Steve, Smith, Dave, Stephen J Foti, Sambell, Alistair, Jiang, Yuanyuan, David Smith   +7 more
core   +1 more source

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, Aijun Liu, Xiaofei Pan, Heng Wang   +3 more
doaj   +1 more source

Spectral Efficiency Maximization for Deliberate Clipping-Based Multicarrier Faster-Than-Nyquist Signaling

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, Aijun Liu, Li Song, Imran Memon, Heng Wang   +4 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, Xiaofei Pan, Kegang Pan, Zhan Ye, Chao Gong   +4 more
doaj   +1 more source

Experimental Demonstration of High-Security and Low-CSPR Single-Sideband Transmission System Based on 3D Lorenz Chaotic Encryption

Photonics
Broadcast-style downlinks (e.g., PONs and satellites) expose physical waveforms despite transport-layer cryptography, motivating physical-layer encryption (PLE).
Chao Yu, Angli Zhu, Hanqing Yu, Yuanfeng Li, Mu Yang, Peijin Hu, Haoran Zhang, Xuan Chen, Hao Qi, Deqian Wang, Yiang Qin, Xiangning Zhong, Dong Zhao, Yue Liu   +13 more
doaj   +1 more source

On the role of satellite communications for emergency situations with a focus on Europe

, 2011
International audienceIn this paper, we describe how satellite communications may contribute to disaster management. During emergency situations, satellite communications present many advantages in supporting or replacing a terrestrial infrastructure (if
Matteo Berioli, Laurent Thomasson, Berioli, Matteo, Franck, Laurent, Rosalba Suffritti, Boutry, Philippe, Luca Simone Ronga, Suffritti, Rosalba, Thomasson, Laurent, Guy Harles, Ronga, Luca Simone, Laurent Franck, LUCA SIMONE, Ronga, Philippe Boutry, Harles, Guy   +14 more
core   +1 more source

Adaptive beamforming for large arrays in satellite communications systems with dispersed coverage [PDF]

, 2011
Conventional multibeam satellite communications systems ensure coverage of wide areas through multiple fixed beams where all users inside a beam share the same bandwidth. We consider a new and more flexible system where each user is assigned his own beam,
Larue de Tournemine, Cécile, J. Montesinos, O. Besson, Besson, Olivier, C. Larue de Tournemine, Montesinos, Julien   +5 more
core   +1 more source

Design of Satellite Operations Subsystem Using Dynamic Fault Management Mechanism [PDF]

Journal of Astronomy and Space Sciences, 1998
Satellite Operations Subsystem in the Mission Control Element provides real-time monitoring of the satellite status and transmits telecommands to control the satellite during the contact time.
Jaehoon Kim, Heesook Mo, Woonchan Jung
doaj