Security capability analysis of cognitive radio network with secondary user capable of jamming and self-powering

Abstract

This paper investigates a cognitive radio network where a secondary sender assists aprimary transmitter in relaying primary information to a primary receiver and also transmits itsown information to a secondary recipient. This sender is capable of jamming to protect secondaryand/or primary information against an eavesdropper and self-powering by harvesting radio frequencyenergy of primary signals. Security capability of both secondary and primary networks are analyzedin terms of secrecy outage probability. Numerous results corroborate the proposed analysis whichserves as a design guideline to quickly assess and optimize security performance. More importantly,security capability trade-off between secondary and primary networks can be totally controlled withappropriate selection of system parameters.