Authors: Akkurada Roja, M S R N Naidu
Abstract: To implement spectrum sharing networks in practice, a number of challenging issues, including security, need to be addressed. On account of the open and dynamic features, spectrum sharing CR networks are vulnerable to various malicious attacks, making secure communications to be a difficult task. In the traditional networks, multiple antenna techniques, which can provide extra spatial degrees of freedom, have been exploited to enhance the security of data transmission. we investigate the secrecy performance of a multi-antenna spectrum sharing relaying network in the presence of an eavesdropper. To exploit the inherent benefits of multiple antenna techniques, MRC/ZFB scheme at the relay is used to improve the security of the considered system. Spectrum Sensing algorithm is introduced after ML equalizer. So it will identified the high priority channel quickly. By this processing we can increase the spectral efficiency is proposed. In doing so, we derive exact and simple asymptotic closed-form expressions for the secrecy outage probability of spectrum sharing relaying wiretap channels with the consideration of both the maximum transmit power constraint and the interference temperature constraint.