Symbol error probability of secondary user in underlay cognitive radio networks with adaptive transmit power constraint

Abstract

The objective of this paper is to study the performance of a cognitive radio network (CRN) under the influence of an eavesdropper (EAV) which can wiretap the primary user (PU) communication. In this CRN, the secondary transmitter (SU)’s transmit power is susceptible to the collaborative constraint of its peak transmit power. Consequently, the author groups derive an adaptive transmit power policy and analytical expression of symbol error probability for the SU. From the numerical results that were obtained, it can be concluded that as the SU presents in the CRN, the primary network security is enhanced. Readers as operators or system designers may find this paper useful as it provides information about the cooperation of the PU and SU in a spectrum sharing CRN to prevent security attack.