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High-security three-dimensional optical transmission mechanism utilizing time-frequency-space interleaving

Jie Cui, Bo Liu, Jianxin Ren

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    |November 29, 2023
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    Summary

    This study introduces a high-security 3D optical transmission system using chaos encryption. The novel method enhances data security and reliability for optical communications.

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    Area of Science:

    • Optical Communications
    • Information Security
    • Signal Processing

    Background:

    • Orthogonal Time-Frequency Space (OTFS) modulation offers advantages in high-mobility and high-frequency scenarios.
    • Enhancing the security and reliability of optical transmission systems is crucial for modern communication networks.
    • Existing encryption methods may not fully address the complex challenges in three-dimensional optical transmission.

    Purpose of the Study:

    • To propose and validate a high-security three-dimensional optical transmission system.
    • To enhance both the security and reliability of optical communication systems.
    • To leverage time-frequency-space interleaving chaos for advanced encryption.

    Main Methods:

    • Utilizing a four-wing 3D chaos model for encrypting OTFS signals.
    • Implementing time-frequency-space interleaved modulation.
    • Experimentally validating the system using hexadecimal modulation techniques.

    Main Results:

    • Achieved a transmission rate of 34.1 Gb/s over a 2-km seven-core fiber link.
    • Demonstrated a receiver sensitivity gain of up to 1.31 dB for OTFS signals compared to OFDM.
    • Obtained a keyspace of 5 × 10^48, indicating high security.

    Conclusions:

    • The proposed high-security 3D-OTFS system effectively enhances confidentiality and anti-interference capabilities.
    • The system shows significant promise for future secure optical communication applications.
    • The integration of chaos encryption with OTFS modulation provides a robust solution for secure data transmission.