Abstract
This paper proposes a physical encryption scheme for discrete cosine transform (DCT) precoded OFDM-based visible light communication systems by employing chaos scrambling. In the proposed encryption scheme, the Logistic map is adopted for the chaos mapping. The chaos scrambling strategy can allocate the two scrambling sequences to the real (I) and imaginary (Q) parts of OFDM frames according to the initial condition, which enhance the confidentiality of the physical layer. The simulation experimental results prove the efficiency of the proposed encryption method for DCT precoded OFDM-based VLC systems. The experimental results show that the proposed security scheme can protect the DCT precoded OFDM-based VLC from eavesdropper, while keeping the advantage of the DCT precoding technique, which can reduce the PAPR and improve the BER performance of OFDM-based VLC.
Highlights
Visible light communication (VLC) using light emitting diodes (LEDs), where the LEDs are used for both illumination and data wireless transmission, has received increasing attention among the researchers worldwide [1, 2]
Due to the greater immunity to multipath fading and reducing the complexity of equalizer, orthogonal frequency division multiplexing (OFDM) is one of the most popular techniques for high data rate communication. It has been accepted in the IEEE802.11a local area network (LAN), IEEE802.16 WiMax, digital audio broadcasting (DAB), and digital video broadcasting (DVB) and generation mobile technologies 3GPP LTE [4]
We will evaluate the effect of scrambling sequence on the peak-to-average power ratio (PAPR) and bit error rate (BER) performances of discrete cosine transform (DCT) precoded OFDMVLC over multipath optical wireless channel by simulation
Summary
Visible light communication (VLC) using light emitting diodes (LEDs), where the LEDs are used for both illumination and data wireless transmission, has received increasing attention among the researchers worldwide [1, 2]. Due to the greater immunity to multipath fading and reducing the complexity of equalizer, orthogonal frequency division multiplexing (OFDM) is one of the most popular techniques for high data rate communication It has been accepted in the IEEE802.11a local area network (LAN), IEEE802.16 WiMax, digital audio broadcasting (DAB), and digital video broadcasting (DVB) and generation mobile technologies 3GPP LTE [4]. Some physical secure strategies have been proposed in wireless communication and optical OFDM communication systems for fiber link [8,9,10,11,12] Among these proposed schemes, chaos mapping techniques have usually been employed to enhance the security of physical layer. We firstly propose a novel secure DCT precoded OFDM-based VLC using chaos scrambling technique.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
