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  • Spectrum Efficiency Improvement for Quasi-Constant Envelope OFDM

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    Spectrum Efficiency Improvement for Quasi-Constant Envelope OFDM Abstract-Benefiting from low peak-to-average power ratio (PAPR), constant envelope OFDM (CE-OFDM) is a promising technique in coherent optical communication. However, the spectrum efficiency of CE-OFDM is only half of conventional coherent optical OFDM, which restricts its application. We proposed a novel quasi-constant envelope OFDM (Quasi-CE-OFDM) scheme with in-phase/quadrature…

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