Ruído artificial para redes PLC residenciais sob a presença de intrusos PLC e sem fio

Abstract

In this study, we investigate an artificial noise designed based on the degrees of freedom of the cyclic prefix to enhance the security of in-home power line communication (PLC) networks. The artificial noise is generated to impair the decoding capability of various eavesdroppers, whether they are PLC or wireless devices, without affecting the decoding of data by legitimate receivers.

Initially, we present the system model for the transmission and reception of information, con- sidering the Hermitian symmetric orthogonal frequency-division multiplexing scheme. Next,

we meticulously describe the design of the artificial noise based on the degrees of freedom

introduced by the cyclic prefix and the expressions for the signal-to-noise ratio of both the legit- imate receiver and eavesdroppers. Numerical results derived from measured data demonstrate

that the considered artificial noise technique is more effective in more threatening scenarios to PLC networks, specifically those with PLC eavesdroppers close to the legitimate transmitter. Furthermore, analysis of the transmitted signal indicates that the artificial noise significantly increases the peak-to-average power ratio, regardless of the channel used to design it and the modulation scheme assumed to transmit information.