Enhancing Secrecy Capacity in PLS Communication with NORAN based on Pilot Information Codebooks

TL;DR

This paper introduces a novel NORAN design based on pilot information codebooks that enhances the secrecy capacity of PLS communication systems without increasing noise in the legitimate channel.

Contribution

It proposes a pilot information codebook-based NORAN scheme that selects suboptimal noise patterns to improve security performance.

Findings

Significant increase in secrecy capacity demonstrated through simulations.

The proposed method effectively reduces the impact of NORAN noise on legitimate channels.

Enhanced security performance compared to traditional NORAN approaches.

Abstract

In recent research, non-orthogonal artificial noise (NORAN) has been proposed as an alternative to orthogonal artificial noise (AN). However, NORAN introduces additional noise into the channel, which reduces the capacity of the legitimate channel (LC). At the same time, selecting a NORAN design with ideal security performance from a large number of design options is also a challenging problem. To address these two issues, a novel NORAN based on a pilot information codebook is proposed in this letter. The codebook associates different suboptimal NORANs with pilot information as the key under different channel state information (CSI). The receiver interrogates the codebook using the pilot information to obtain the NORAN that the transmitter will transmit in the next moment, in order to eliminate the NORAN when receiving information. Therefore, NORAN based on pilot information codebooks can improve the secrecy capacity (SC) of the communication system by directly using suboptimal NORAN design schemes without increasing the noise in the LC. Numerical simulations and analyses show that the introduction of NORAN with a novel design using pilot information codebooks significantly enhances the security and improves the SC of the communication system.