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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Symbol-interleaved precoding technique for DDO-OFDM systems with the KK receiver

Yi Liu, Ming Chen, Xu Gao

    Optics Express
    |December 16, 2022
    PubMed
    Summary

    We propose a new DFT/Walsh-Hadamard transform (WHT) precoding technique for direct-detection optical orthogonal frequency-division multiplexing (DDO-OFDM) systems. This method improves receiver sensitivity and bit error rate (BER) performance with Kramers-Kronig (KK) receivers.

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