Results 21 to 30 of about 1,766,714 (261)

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

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

, 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

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

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

Signal processing techniques for aeronautical communications via satellite [PDF]

, 2005
Aeronautical communications are playing an important role in the air traffic control as well as new passenger communication services. Due to the global coverage required, satellite transponders provide the required links which are traditionally limited ...
P. Fines, Christofylaki, E., K. Christofylaki, P. Febvre, Fines, P., Febvre, P.   +5 more
core   +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

Broadband satellite multimedia [PDF]

, 2010
The broadband satellite multimedia (BSM) architecture standardised by ETSI defines a satellite independent service access point (SI-SAP) interface layer that separates the satellite independent features of the upper layers from the satellite dependant ...
Berioli M., P.M.L. Chan, Kotsopoulos, Kostas, G. Giambene, Hu Y. F., M. Berioli, Berioli, Matteo, K. Kotsopoulos, Chan P. M. L., Y.F. Hu, Pillai P., Pillai, Prashant, GIAMBENE, GIOVANNI, Cruickshank H., Chan, Pauline M.L., H. Cruickshank, Guo, Wei, W. Guo, Kotsopoulos K., Hu, Fun, Guo W., P. Pillai, Cruickshank, Haitham, Cruickshank, HS, Hu, YF, Kotsopoulos, K, Chan, PML, Pillali, P, Berioli, M, Guo, W, Giambene, G   +30 more
core   +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

Group size estimation for hybrid satellite/terrestrial reliable multicast [PDF]

, 2004
This paper addresses the problem of group size estimation for hybrid satellite/terrestrial multipoint communications. Estimators based on the maximum likelihood principle are investigated.
L. Dairaine, Fraboul, Christian, Dairaine, Laurent, Tourneret, Jean-Yves, F. de Belleville, J.Y. Tourneret, De Belleville, Florestan, C. Fraboul   +7 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