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In this paper, we consider a novel energy-harvesting (EH) cognitive radio framework in which the primary source beamforms excess available energy to an EH secondary transmitter (ST) so as to enable it to share the spectrum. In the first phase of transmission, the multi-antenna primary source optimally beamforms symbols to its decode and forward relay while beamforming all excess energy to a selected...
We consider a two-hop underlay cognitive radio network (CRN) in which the secondary relay (SR) harvests energy from the secondary source (SS) before commencing two-hop transmission. During the energy harvesting phase, energy is transmitted in packets of small size followed by a silent intervals in which the relay provides a one-bit feedback. Without any need to pass channel estimates to a central...
We consider a two-hop primary network with a multi-antenna primary base-station (PBS) communicating to its distant primary receiver (PR) through a relay, and a secondary network with one of several energy harvesting secondary transmitters (STs) communicating to the secondary base-station (SBS). In this paper we propose a novel framework where the PBS utilizes its excess available power to charge a...
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