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• W4386477993 abstract "Traditional pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) suffers from poor overall performance of spectral and power efficiencies in optical wireless communication (OWC) systems. We propose layered hybrid PAM-DMT (LHPAM-DMT) to utilize more subcarriers to improve the performance. The real part of frequency domain signal is divided into several layers and symmetry biases are added in time domain to generate real-valued and nonnegative signals for intensity modulation with direct detection (IM/DD) OWC systems. By appropriately designing the orthogonality between the signals in lower layers and signals & added biases in higher layers, we further propose an iterative receiver to recover the transmitted information. Theoretical derivation proves that LHPAM-DMT has higher spectral efficiency than PAM-DMT and lower complexity than layered PAM-DMT. Numerical results suggest that LHPAM-DMT is more power efficient than PAM-DMT as well as direct-current (DC) biased optical OFDM (DCO-OFDM), one of the most popular schemes." @default.
• W4386477993 created "2023-09-07" @default.
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• W4386477993 date "2023-09-14" @default.
• W4386477993 modified "2023-09-30" @default.
• W4386477993 title "Layered Hybrid PAM-DMT for IM/DD OWC Systems" @default.
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• W4386477993 doi "https://doi.org/10.1364/oe.493545" @default.
• W4386477993 hasPublicationYear "2023" @default.
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