Security Enhancement using Channel State Information for Multicarrier Modulation

Abstract

Wireless technologies of the fifth generation (5G) are vital to advancing Internet-of- Things (IoT) networks in the future. Information security in wireless networks is one of the most difficult problems due to the open nature of the wireless medium. A promising pproach to ensure strong security has been characterized as physical layer security, which exploits the differences between the physical properties of signal channels to provide a resilient and effectively degraded signal at an eavesdropper that cannot be recovered regardless of the processing of the signal. This thesis presents a coherent framework for a secure transmission and receiver for IoT devices. The proposed framework will operate only in the physical layer. A study of symbol shuffling using channel state information (CSI) in OFDM (Orthogonal Frequency Division Multiplexing) GFDM(Generalized Frequency Division Multiplexing) are presented here. BER simulations of the multi-carrier modulation schemes with proposed Physical Layer Security(PLS) technique. Further, simulations of OFDM with the proposed PLS technique have been performed in order to compare different equalizers, tap lengths, and modulations. Devices with limited resources can benefit from these proposed PLS technique.