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Interleaved and partial transmission interleaved optical coherent orthogonal frequency division multiplexing.

Zizheng Cao, Henrie P A van den Boom, Eduward Tangdiongga

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    Summary

    New interleaved orthogonal frequency division multiplexing (IL-OFDM) and partial transmission IL-OFDM (PT-IL-OFDM) schemes improve optical coherent detection. PT-IL-OFDM enhances tolerance to phase noise induced interchannel interference and reduces peak-to-average power ratio without sacrificing capacity.

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    Area of Science:

    • Optical communications
    • Signal processing

    Background:

    • Orthogonal frequency division multiplexing (OFDM) is crucial for high-speed optical communication.
    • Phase noise induced interchannel interference (PN-ICI) and high peak-to-average power ratio (PAPR) are significant challenges in optical coherent detection.

    Purpose of the Study:

    • To propose novel interleaved OFDM (IL-OFDM) and partial transmission IL-OFDM (PT-IL-OFDM) schemes.
    • To enhance tolerance to PN-ICI and reduce PAPR in optical coherent detection.
    • To address the capacity sacrifice issue of traditional IL-OFDM.

    Main Methods:

    • Development of IL-OFDM by reserving odd or even subcarriers.
    • Exploitation of time-domain symmetry property of IL-OFDM to develop PT-IL-OFDM.
    • Numerical simulations to verify the performance of the proposed schemes.

    Main Results:

    • IL-OFDM demonstrates improved tolerance to PN-ICI and reduced PAPR.
    • PT-IL-OFDM successfully doubles the capacity of IL-OFDM.
    • PT-IL-OFDM achieves low PAPR and high PN-ICI tolerance without capacity loss.

    Conclusions:

    • IL-OFDM and PT-IL-OFDM are effective schemes for optical coherent detection.
    • PT-IL-OFDM offers a superior solution by combining low PAPR, high PN-ICI tolerance, and full capacity utilization.
    • The proposed schemes represent significant advancements in optical communication signal processing.