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Article

Secure OFDM with Peak-to-Average Power Ratio Reduction Using the Spectral Phase of Chaotic Signals

Department of Electrical and Computer Engineering, University of Victoria, P.O. Box 1700, STN CSC, Victoria, BC V8W 2Y2, Canada
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Academic Editor: Vaneet Aggarwal
Entropy 2021, 23(11), 1380; https://doi.org/10.3390/e23111380
Received: 27 September 2021 / Revised: 19 October 2021 / Accepted: 19 October 2021 / Published: 21 October 2021
(This article belongs to the Special Issue Machine Learning for Communications)
In this paper, a new physical layer security technique is proposed for Orthogonal Frequency Division Multiplexing (OFDM) communication systems. The security is achieved by modifying the OFDM symbols using the phase information of chaos in the frequency spectrum. In addition, this scheme reduces the Peak to Average Power Ratio (PAPR), which is one of the major drawbacks of OFDM. The Selected Mapping (SLM) technique for PAPR reduction is employed to exploit the random characteristics of chaotic sequences. The reduction with this algorithm is shown to be similar to that of other SLM schemes, but it has lower computational complexity and side information does not have to be sent to the receiver. The security of this technique stems from the noise like behavior of chaotic sequences and their dependence on the initial conditions of the chaotic generator (which are used as the key). Even a slight difference in the initial conditions will result in a different phase sequence, which prevents an eavesdropper from recovering the transmitted OFDM symbols. View Full-Text
Keywords: secure OFDM communication; chaotic phase sequence; PAPR reduction secure OFDM communication; chaotic phase sequence; PAPR reduction
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MDPI and ACS Style

Haroun, M.F.; Gulliver, T.A. Secure OFDM with Peak-to-Average Power Ratio Reduction Using the Spectral Phase of Chaotic Signals. Entropy 2021, 23, 1380. https://doi.org/10.3390/e23111380

AMA Style

Haroun MF, Gulliver TA. Secure OFDM with Peak-to-Average Power Ratio Reduction Using the Spectral Phase of Chaotic Signals. Entropy. 2021; 23(11):1380. https://doi.org/10.3390/e23111380

Chicago/Turabian Style

Haroun, Mohamad F., and T. A. Gulliver. 2021. "Secure OFDM with Peak-to-Average Power Ratio Reduction Using the Spectral Phase of Chaotic Signals" Entropy 23, no. 11: 1380. https://doi.org/10.3390/e23111380

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