Physical Layer Secrecy rate improvement in MISO using Artificial Fast Fading

Abstract

Wireless communication system limits the security and privacy because of its broad cast nature. Physical layer security gives secure correspondence and having legitimate user to effectively get secure data. Among the physical layer security techniques, an artificial fast fading (AFF) technique dtrait’s the received signal quality of eavesdroppers by causing pseudo fast fading to the transmitting signals. This is realized by multiplying the signals to be transmitted by random weights every symbol interval. However, the AFF technique often increases the power of the weighted signals. In such cases, the weighted signals must be normalized before transmission. This causes energy loss in the legitimate receiver. Therefore, we consider minimizing the norm of the weight vector to prevent the power of the weighted signals from being increased. In this, we propose and achieve Physical layer secrecy rate in MISO system using artificial fading plus information theory.