Monette H. Khadr, Hany Elgala, "Augmented communications: spectral efficiency and security enhanced visible light communications by design," Chin. Opt. Lett. 18, 090601 (2020)
- Chinese Optics Letters
- Vol. 18, Issue 9, 090601 (2020)
Fig. 1. Block diagram detailing an ACom-based VLC system using OFDM, depicting the transmitter, receiver, and the optical channel in between.
Fig. 2. Example of the time-domain representation of an ACom signal, with an IFFT length of 16. The construction is showing the parameters
Fig. 3. Simulation results depicting the relative spectral efficiency gain of ACom versus various system parameters. (a) Modulation order
Fig. 4. BER versus SNR performance with the solid red line denoting the analytical performance and the remaining curves showing ACom at different
Fig. 5. Effective SNR reduction versus
Fig. 6. Experimental setup of ACom using a USRP-N210 with two integrated daughterboards showing the optical frontends and the NUC used for ACom signal processing.
Fig. 7. Experimental BER performance at 4-QAM with an IFFT length of 64 for the legitimate user at
Fig. 8. Experimental BER performance of the eavesdropper as a function of
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Table 1. Spectral Efficiency of Optical OFDM Techniques
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