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Experimental Demonstration of High-Security and Low-CSPR Single-Sideband Transmission System Based on 3D Lorenz Chaotic Encryption

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Publicado en:Photonics vol. 12, no. 11 (2025), p. 1042-1054
Autor principal: Yu, Chao
Otros Autores: Zhu Angli, Yu, Hanqing, Li Yuanfeng, Yang, Mu, Hu Peijin, Zhang Haoran, Chen, Xuan, Qi Hao, Wang, Deqian, Qin Yiang, Zhong Xiangning, Zhao, Dong, Liu, Yue
Publicado:
MDPI AG
Materias:
Pons
Encryption
Co-design
Waveforms
Noise sensitivity
Synchronization
Spectral sensitivity
Mapping
Single sideband transmission
Synchronism
Data encryption
Digitization
Cryptography
Downlinking
Ordinary differential equations
Embedding
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Resumen:Broadcast-style downlinks (e.g., PONs and satellites) expose physical waveforms despite transport-layer cryptography, motivating physical-layer encryption (PLE). Digital chaotic encryption is appealing for its noise-like spectra, sensitivity, and DSP-friendly implementation, but in low-CSPR KK-SSB systems, common embeddings disrupt minimum-phase requirements and raise PAPR/SSBI near 1 dB CSPR, while finite-precision effects can leak correlation after KK reconstruction. We bridge this gap by integrating 3D Lorenz-based PLE into our low-CSPR KK-SSB receiver. A KK-compatible embedding applies a Lorenz-driven XOR mapping to I/Q bitstreams before PAM4-to-16QAM modulation, preserving the minimum phase and avoiding spectral zeros. Co-design of chaotic strength and subband usage with the KK SSBI-suppression method maintains SSBI mitigation with negligible PAPR growth. We further adopt digitization settings and fractional-digit-parity-based key derivation to suppress short periods and remove key-revealing synchronization cues. Experiments demonstrate a 1091 key space without degrading transmission quality, enabling secure, key-concealed operation on shared downlinks and offering a practical path for chaotic PLE in near-minimum-CSPR SSB systems.
ISSN:2304-6732
DOI:10.3390/photonics12111042
Fuente:Advanced Technologies & Aerospace Database