Power allocation policy and performance analysis of secure and reliable communication in cognitive radio networks

摘要: This paper investigates the problem of secure and reliable communications for cognitive radio networks. More specifically, we consider a single input multiple output model where secondary user (SU) faces an eavesdropping attack while being subject to normal interference constraint imposed by primary (PU). Thus, SU must have suitable power allocation policy which does not only satisfy constraints PU but also security such that it obtains reasonable performance SU, without exposing information eavesdropper. We derive four policies different scenarios corresponding whether or channel state eavesdropper are available at SU. Further, introduce concept communication probability (SRCP) as metric evaluate considered system, well efficiency policies. Finally, present numerical examples illustrate polices, impact these on SRCP