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We address secure communications over energy-harvesting based OFDMA cooperative cognitive radio networks, where one primary user (PU) cooperates with several secondary users (SUs) in terms of both information transmission and energy harvesting. To improve spectrum utilization and ensure that SU transmitters can harvest as much energy as possible, we suppose that SUs are equipped with orthogonally...
We address the resource allocation problem for energy- harvesting (EH) based OFDMA cooperative overlay cognitive radio networks with multiple primary users (PUs) and multiple secondary users (SUs), where PUs and SUs cooperate in terms of both information transmission and energy harvesting. Specifically, SU transmitters first apply the power splitting tech- nique to harvest energy from signals radiated...
We propose the joint resource allocation and admission control schemes for energy-harvesting (EH) based cooperative overlay cognitive radio networks under imperfect channel state information (CSI) condition, where the primary-user (PU) pair and several secondary-users (SUs) cooperate in terms of both information transmission and energy harvesting. Specifically, each SU transmitter applies the power...
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