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<p>Chaotic optical secure communication provides reliable physical layer protection for information transmission. In this work, we propose a neural network-based high-order optical chaos shift keying communication scheme. Digital information is modulated by dynamically switching the mapping relationships between the historical and future states of the emitter system. At the receiver, a pre-trained neural network-based discriminator identifies the underlying mapping relationships of this system for each symbol period, enabling demodulation without requiring physical-layer chaos synchronization. The simulation results indicate that the proposed scheme supports a data transmission rate of 2.67 Gbps at a signal-to-noise ratio (SNR) of 10 dB and maintains a reliable transmission rate of 0.66 Gbps even at a low SNR of 5 dB. Furthermore, the chaotic signal generated by the scheme exhibits strong resilience against return map attacks and time-delay signature (TDS) extraction. These results demonstrate the capability of the proposed scheme to maintain reliable communication in high-noise environments.</p>

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Optical chaos shift keying communication system via neural network-based signal reconstruction

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Yijun Zeng,
  • Zhenhua Li,
  • Xiaojing Gao,
  • Mengfan Cheng

摘要

Chaotic optical secure communication provides reliable physical layer protection for information transmission. In this work, we propose a neural network-based high-order optical chaos shift keying communication scheme. Digital information is modulated by dynamically switching the mapping relationships between the historical and future states of the emitter system. At the receiver, a pre-trained neural network-based discriminator identifies the underlying mapping relationships of this system for each symbol period, enabling demodulation without requiring physical-layer chaos synchronization. The simulation results indicate that the proposed scheme supports a data transmission rate of 2.67 Gbps at a signal-to-noise ratio (SNR) of 10 dB and maintains a reliable transmission rate of 0.66 Gbps even at a low SNR of 5 dB. Furthermore, the chaotic signal generated by the scheme exhibits strong resilience against return map attacks and time-delay signature (TDS) extraction. These results demonstrate the capability of the proposed scheme to maintain reliable communication in high-noise environments.