An incremental cooperative solution for multicast cognitive network under joint impact of hardware impairment and interference constraint

In this paper, we investigate joint impact of hardware transceiver impairment and interference constraint on performances of cooperative relaying protocols in underlay cognitive radio. In the proposed protocol, a secondary source uses incremental cooperative technique to transmit its data to multiple secondary destinations via a secondary relay. We derive exact and asymptotic expressions of the outage probability and average number of the secondary destinations which successfully receive the source data. All of the derivations are validated by computer simulations using Monte Carlo methods.