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The relationship between the FFT size, modulation format and laser linewidth is studied in a remote heterodyne scenario where phase noise is compensated by pilot tones. Results indicate that the laser linewidth tolerance directly depends on the bandwidth per subcarrier.
CitationEscayola, F. [et al.]. Laser linewidth requirements for remote heterodyne OFDM based PON scenario. A: International Conference on Transparent Optical Networks. "Proceedings of 2004 6th International Conference on Transparent Optical Networks". Varsovia: IEEE Press and Wiley, 2004, p. 6876349-1-6876349-4.
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