Browsing by Subject "Broadcast channels"

Now showing items 1-2 of 2

    • On the degrees of freedom of the cognitive broadcast channel 

      Shahmohammadi, Mohammad; Koyluoglu, O. Ozan; Khattab, Tamer M. S.; El Gamal, Hesham (2011 , Conference Paper)
      Cognitive broadcast channel, where two multiantenna transmitters communicate with their respective receivers, is considered. One of the transmitters is said to be cognitive (secondary) as it is assumed to know the messages ...

    • 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 ...