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» Spectrum trading with insurance in cognitive radio networks
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TSP
2010
13 years 3 months ago
Beamforming and rate allocation in MISO cognitive radio networks
We consider decentralized multiantenna cognitive radio networks where the secondary (cognitive) users are granted simultaneous spectrum access along with the license-holding (prima...
Ali Tajer, Narayan Prasad, Xiaodong Wang
ICASSP
2009
IEEE
14 years 3 months ago
Beacon-assisted spectrum access with cooperative cognitive transmitter and receiver
—Spectrum access is an important function of cognitive radios for detecting and utilizing spectrum holes without harming the legacy systems. In this paper, we propose novel coope...
Ali Tajer, Xiaodong Wang
ICC
2007
IEEE
170views Communications» more  ICC 2007»
14 years 13 days ago
Adaptive Power Loading for OFDM-Based Cognitive Radio Systems
Abstract--Cognitive radio (CR) technology is an innovative radio design philosophy which aims to increase spectrum utilization by exploiting unused spectrum in dynamically changing...
Gaurav Bansal, Md. Jahangir Hossain, Vijay K. Bhar...
PIMRC
2010
IEEE
13 years 6 months ago
Optimal beamforming in cognitive two-way relay networks
We consider a cognitive two-way relay network which consists of two transceivers (primary users) and multiple cognitive terminals. The two transceivers transmit their data toward t...
Ardalan Alizadeh, Seyed Mohammad-Sajad Sadough, Na...
INFOCOM
2012
IEEE
11 years 11 months ago
Spectrum mobility games
Cognitive radio gives users the ability to switch channels and make use of dynamic spectral opportunities. However, switching channels takes time, and may disrupt the quality of a...
Richard Southwell, Jianwei Huang, Xin Liu