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Opportunistic spectrum sharing in relay-assisted cognitive systems with imperfect CSI
(
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 ...
Doppler compensation for AF two way relaying over time varying UWA channels
(
IEEE
, 2014 , Conference Paper)
In this paper, we consider Doppler compensation for time varying underwater acoustic channels. The underlying system model comprises two sources, S1 and S2, communicating with each other through a relay, R. The transmission ...