Image secure transmission for optical orthogonal frequency-division multiplexing visible light communication systems using chaotic discrete cosine transform

Zhongpeng Wang; Shaozhong Zhang; Fangni Chen; Ming-Wei Wu; Weiwei Qiu

doi:10.1117/1.OE.56.11.116110

14 November 2017 Image secure transmission for optical orthogonal frequency-division multiplexing visible light communication systems using chaotic discrete cosine transform

Zhongpeng Wang, Shaozhong Zhang, Fangni Chen, Ming-Wei Wu, Weiwei Qiu

Author Affiliations +

Optical Engineering, Vol. 56, Issue 11, 116110 (November 2017). https://doi.org/10.1117/1.OE.56.11.116110

Abstract

A physical encryption scheme for orthogonal frequency-division multiplexing (OFDM) visible light communication (VLC) systems using chaotic discrete cosine transform (DCT) is proposed. In the scheme, the row of the DCT matrix is permutated by a scrambling sequence generated by a three-dimensional (3-D) Arnold chaos map. Furthermore, two scrambling sequences, which are also generated from a 3-D Arnold map, are employed to encrypt the real and imaginary parts of the transmitted OFDM signal before the chaotic DCT operation. The proposed scheme enhances the physical layer security and improves the bit error rate (BER) performance for OFDM-based VLC. The simulation results prove the efficiency of the proposed encryption method. The experimental results show that the proposed security scheme not only protects image data from eavesdroppers but also keeps the good BER and peak-to-average power ratio performances for image-based OFDM-VLC systems.

Citation Download Citation

Zhongpeng Wang, Shaozhong Zhang, Fangni Chen, Ming-Wei Wu, and Weiwei Qiu "Image secure transmission for optical orthogonal frequency-division multiplexing visible light communication systems using chaotic discrete cosine transform," Optical Engineering 56(11), 116110 (14 November 2017). https://doi.org/10.1117/1.OE.56.11.116110

Received: 11 August 2017; Accepted: 25 October 2017; Published: 14 November 2017

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