Browsing by Author "Letaief, Khaled Ben"
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Opportunistic spectrum sharing in relay-assisted cognitive systems with imperfect CSI
Hamdi, Karama; Hasna, Mazen O.; Ghrayeb, Ali; Letaief, Khaled Ben ( IEEE , 2014 , Article)In this paper, we consider spectrum sharing between cognitive radio (CR) users and a licensed primary user (PU) to enhance the spectrum efficiency. In the considered scenario, the PU is not able to successfully transmit ...