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Keywords

index modulation; physical-layer security; frequency domain; power line communication; orthogonalfrequency division multiplexing; artificial noise

Abstract

To address the illegal eavesdropping problem caused by the openness of power line communication （PLC） channels, a physical-layer secure transmission scheme, namely artificial noise added orthogonal frequency division multiplexing with index modulation （AN-added OFDM-IM ）, is proposed from the perspective of physical-layer security for wiretap PLC channels.In this scheme, the index bits are still transmitted through the states of carriers, and the modulated bits are still transmitted via active carriers, while the idle inactive carriers are used to transmit artificial noise （AN） generated based on the channel state information （CSI） between legitimate links.The secure transmission rate of the proposed scheme over PLC channels is derived.Simulations are conducted on the secure rate and bit error rate of the network under various scenarios.Simulation results show that the scheme can not only improve the security of PLC networks but also maintain a good bit error rate.

DOI

10.19781/j.issn.1673-9140.2025.05.008

First Page

82

Last Page

89

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