Optimal multi-slot spectrum sensing and transfer in multichannel cognitive radio

Abstract

In this paper, a multi-slot spectrum sensing and transfer scheme inmultichannel CR is proposed by dividing the sensing stage into several time slots that are allocated to the subchannels for spectrum sensing. We formulate an optimization problem that maximizes the SU's aggregate throughput by jointly allocating the optimal number of sensing time slots and transfer power to each subchannel. The simulation results show that the notable improvement on the SU's throughput can be achieved when the sensing time slots and the transfer power are both optimized.