Physical-Layer Security With Optical Generalized Space Shift Keying

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Date

2020

Authors

Panayırcı, Erdal
Yeşilkaya, Anıl
Çoğalan, Tezcan
Poor, H. Vincent
Haas, Harald

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Publisher

Ieee-Inst Electrıcal Electronıcs Engıneers Inc

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Abstract

Spatial modulation (SM) is a promising technique that reduces inter-channel interference while providing high power efficiency and detection simplicity. In order to ensure the secrecy of SM, precoding and friendly jamming are widely adopted in the literature. However, neither of those methods can take advantage of SM. In this paper, a novel spatial constellation design (SCD) technique is proposed to enhance the physical layer security (PLS) of optical generalized space shift keying (GSSK), which can retain some benefits of SM. Due to the lack of small-scale fading, the quasi-static characteristics of the optical channel is used to tailor the received signal at the legitimate user's (Bob's) side. The PLS of the system is guaranteed by the appropriate selection of the power allocation coefficients for randomly activated light emitting diodes (LEDs). With the aid of Bob's channel state information at the transmitter, the bit error ratio (BER) of Bob is minimized while the BER performance of the potential eavesdroppers (Eves) is significantly degraded. Monte-Carlo simulation results show that the proposed SCD-zero forcing precoding (ZFP) forces Eve to experience a BER of around 0.5 by outperforming both the conventional and ZFP based GSSK for all practical signal-to-noise-ratio regimes and Bob-Eve separations.

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Keywords

Precoding, Optical transmitters, Jamming, Security, MIMO communication, Receivers, Integrated optics, PHY layer security, optical wireless communications (OWC), generalized space shift keying (GSSK), Multiple-input multiple-output (MIMO) channels, Secrecy capacity

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Citation

27

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Q1

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Volume

68

Issue

5

Start Page

3042

End Page

3056