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• W3197250466 abstract "Visible light communication (VLC) operates on optical intensity channels that are inherently limited in bandwidth. Though Kramers-Kronig (KK) receivers have been considered as a lower complexity alternative for coherent fiber optic communication (FOC) systems, in this paper we extend this concept to bandlimited IM/DD VLC channels and propose KK optical OFDM (KKO-OFDM). In KKO-OFDM the optical power of a low-cost LED is directly modulated by the double-sideband (DSB) squared modulus of a minimum phase single-sideband (SSB) signal. This results in a real-valued, non-negative and strictly bandlimited transmit signal which is suitable for VLC channels. At the receiver, the phase of the transmitted SSB signal is reconstructed via the KK relations. The required DC bias, average electrical signal-to-noise ratio (SNR), bit error rate (BER), and capacity are analyzed with approximate closed-forms and through simulation. Numerical results show that KKO-OFDM achieves the same spectral efficiency as the existing DC biased optical OFDM (DCO-OFDM), however, realizes approximately 1 dB optical SNR gain at a BER <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$=10^{-4}$</tex-math></inline-formula> while simultaneously having a small peak-to-average power ratio." @default.
• W3197250466 created "2021-09-13" @default.
• W3197250466 creator A5063715338 @default.
• W3197250466 creator A5091612000 @default.
• W3197250466 date "2021-11-15" @default.
• W3197250466 modified "2023-09-24" @default.
• W3197250466 title "Kramers-Kronig Optical OFDM for Bandlimited Intensity Modulated Visible Light Communications" @default.
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• W3197250466 doi "https://doi.org/10.1109/jlt.2021.3110661" @default.
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