Lasers, Fiber Optics, and Communications

Combined peak-to-average power ratio reduction and physical layer security enhancement in optical orthogonal frequency division multiplexing visible-light communication systems

[+] Author Affiliations
Zhongpeng Wang

Zhejiang University of Science and Technology, School of Information and Electronic Engineering, No. 318, Liu-he-lu, Hangzhou 310023, China

Southeast University, State Key Laboratory of Millimeter Waves, 2 Si Pai Lou, Nanjing 210096, China

Shoufa Chen

Zhejiang University of Science and Technology, School of Information and Electronic Engineering, No. 318, Liu-he-lu, Hangzhou 310023, China

Opt. Eng. 55(7), 076110 (Jul 20, 2016). doi:10.1117/1.OE.55.7.076110
History: Received April 12, 2016; Accepted June 27, 2016
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Abstract.  A physical encryption scheme for discrete Hartley transform (DHT) precoded orthogonal frequency division multiplexing (OFDM) visible-light communication (VLC) systems using frequency domain chaos scrambling is proposed. In the scheme, the chaos scrambling, which is generated by a modified logistic mapping, is utilized to enhance the physical layer of security, and the DHT precoding is employed to reduce of OFDM signal for OFDM-based VLC. The influence of chaos scrambling on peak-to-average power ratio (PAPR) and bit error rate (BER) of systems is studied. The experimental simulation results prove the efficiency of the proposed encryption method for DHT-precoded, OFDM-based VLC systems. Furthermore, the influence of the proposed encryption to the PAPR and BER of systems is evaluated. The experimental results show that the proposed security scheme can protect the DHT-precoded, OFDM-based VLC from eavesdroppers, while keeping the good BER performance of DHT-precoded systems. The BER performance of the encrypted and DHT-precoded system is almost the same as that of the conventional DHT-precoded system without encryption.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zhongpeng Wang and Shoufa Chen
"Combined peak-to-average power ratio reduction and physical layer security enhancement in optical orthogonal frequency division multiplexing visible-light communication systems", Opt. Eng. 55(7), 076110 (Jul 20, 2016). ; http://dx.doi.org/10.1117/1.OE.55.7.076110


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