Abstract
ABSTRACT In this paper, the performance of a multihop cognitive radio network is investigated in the presence of co-channel interference (CCI) which affects the primary receiver and secondary receiver nodes. A deterministic expression for the maximum allowable transmit power of the secondary nodes is derived based on the tolerable outage probability of the primary network. The system considers radio frequency energy harvesting at the secondary source and intermediate secondary nodes from the primary user transmitter as well as from the various CCIs present around the nodes. We analyse secondary outage probability and derive a closed-form analytical expression for secondary outage probability. We present the impact of PU-TX transmit power and efficiency of harvester circuit on the secondary outage probability. The optimum number of intermediate relays is indicated for several number of CCIs which minimises outage probability of secondary network.
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