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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 36,
  • Issue 20,
  • pp. 4826-4833
  • (2018)

Secure Strategy for OFDM-PON Using Digital Chaos Algorithm With Fixed-Point Implementation

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Abstract

We propose a scheme for security improvement in the orthogonal frequency division multiplexing (OFDM) passive optical network based on a fixed-point digital chaos algorithm with a low computational precision. The dynamical degradation problem is improved by introducing the transmitted data as a perturbation source. In our demonstration, aperiodic key streams are generated from a fixed-point chaos with its trajectory disturbed by the upstream data, and then used to encrypt the downstream data. A 7.64-Gbps encrypted OFDM signal is successfully transmitted over a 25-km standard single mode fiber. The experimental results indicate that the proposed scheme suggests an effective and promising solution to meet the demands for low implementation complexity and high security level.

© 2018 IEEE

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