1 research outputs found
Antenna Beamforming for Energy Harvesting in Cognitive Radio Networks
In this paper, a cooperative cognitive radio network
(CRN) with energy harvesting capabilities of its secondary users
is considered. Specifically, cooperative spectrum sensing and
multi-antenna beamforming are employed to improve the sensing
performance and the energy transfer efficiency, respectively. In
our approach, a homogeneous CRN scenario is studied where the
optimal sensing probability of each second user (SU) is obtained
to maximize the control center (CC) throughput while satisfying
the energy causality and primary user (PU) collision constraints.
An iterative algorithm is proposed to obtain the optimal charging
time. Numerical results depict that in an energy constrained
scenario, cooperative spectrum sensing with beamforming performs
much better than cooperative spectrum sensing without
beamforming in terms of increased system throughpu