Frequency packing for interference alignment-based cognitive dual satellite systems

S Chatzinotas, SK Sharma… - 2013 IEEE 78th Vehicular …, 2013 - ieeexplore.ieee.org
Interference Alignment (IA) has been considered a promising technique for spectral
coexistence of different wireless systems in an underlay cognitive mode. Furthermore …

Cognitive beamhopping for spectral coexistence of multibeam satellites

SK Sharma, S Chatzinotas… - International Journal of …, 2015 - Wiley Online Library
Herein, the spectral coexistence scenario of two multibeam satellites over a common
coverage area is studied where a primary satellite produces larger beams while a …

Interference alignment for spectral coexistence of heterogeneous networks

SK Sharma, S Chatzinotas, B Ottersten - EURASIP Journal on Wireless …, 2013 - Springer
The coexistence of heterogeneous networks within the same spectrum for enhancing the
spectrum efficiency has attracted large interest lately in the research community …

Transmit beamforming for spectral coexistence of satellite and terrestrial networks

SK Sharma, S Chatzinotas… - … Conference on Cognitive …, 2013 - ieeexplore.ieee.org
Herein, we study transmit beamforming techniques in an underlay cognitive mode for the
coexistence of satellite and terrestrial networks with the satellite forward link as primary and …

Cognitive radio techniques for satellite communication systems

SK Sharma, S Chatzinotas… - 2013 IEEE 78th vehicular …, 2013 - ieeexplore.ieee.org
The usable satellite spectrum is becoming scarce due to continuously increasing demand
for broadcast, multimedia and interactive services. In this context, cognitive satellite …

Interference alignment based on antenna selection with imperfect channel state information in cognitive radio networks

X Li, N Zhao, Y Sun, FR Yu - IEEE Transactions on Vehicular …, 2015 - ieeexplore.ieee.org
Interference alignment (IA) is a promising technique that can eliminate interference in
wireless networks effectively and has been applied to spectrum sharing in cognitive radio …

Sum-rate improvement in cognitive radio through interference alignment

F Rezaei, A Tadaion - IEEE Transactions on Vehicular …, 2015 - ieeexplore.ieee.org
In this paper, we propose an interference alignment (IA) scheme in which the performance of
the secondary users (SUs) transmitting their information on the same frequency band of the …

Cognitive interference management techniques for the spectral co-existence of GSO and NGSO satellites

A Pourmoghadas, SK Sharma, S Chatzinotas… - Wireless and Satellite …, 2017 - Springer
One of the main challenges in the co-existence of geostationary satellite orbit (GSO) and
non-geostationary satellite orbit (NGSO) satellite networks is to mitigate the in-line …

A novel cognitive satellite network with GEO and LEO broadband systems in the downlink case

C Wang, D Bian, S Shi, J Xu, G Zhang - IEEE Access, 2018 - ieeexplore.ieee.org
With the development of satellite communication, the number of satellites in space
continuously increases. However, the available spectrum resources are scarce. To address …

Satellite cognitive communications: Interference modeling and techniques selection

SK Sharma, S Chatzinotas… - 2012 6th Advanced …, 2012 - ieeexplore.ieee.org
Due to increasing demand of high speed data rate for satellite multimedia and broadcasting
services and spectrum scarcity problem in satellite bands, exploring new techniques for …