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- W4210529137 abstract "The bound of the information transmission rate of direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) for visible light communication (VLC) with finite-alphabet inputs is yet unknown, where the corresponding spectral efficiency (SE) and energy efficiency (EE) stems out as the open research problems. In this paper, we derive the exact achievable rate of the DCO-OFDM system with finite-alphabet inputs for the first time. Furthermore, we investigate SE maximization problems of the DCO-OFDM system subject to both electrical and optical power constraints. By exploiting the relationship between the mutual information and the minimum mean-squared error, we propose a multi-level mercury-water-filling power allocation scheme to achieve the maximum SE. Moreover, the EE maximization problems of the DCO-OFDM system are studied, and the Dinkelbach-type power allocation scheme is developed for the maximum EE. Numerical results verify the effectiveness of the proposed theories and power allocation schemes." @default.
- W4210529137 created "2022-02-08" @default.
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- W4210529137 date "2022-08-01" @default.
- W4210529137 modified "2023-10-16" @default.
- W4210529137 title "Spectral and Energy Efficiency of DCO-OFDM in Visible Light Communication Systems With Finite-Alphabet Inputs" @default.
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- W4210529137 doi "https://doi.org/10.1109/twc.2022.3145288" @default.
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