Polarization, phase and mode dynamic disturbance method

A technology of perturbation method and mode, applied in the field of communication, can solve problems such as increasing the nonlinear complexity of chaotic mapping

Active Publication Date: 2020-10-16
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

It exhibits hyperchaotic behavior with multiple scroll attractors, increasing the nonlinear complexity of the chaotic map

Method used

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  • Polarization, phase and mode dynamic disturbance method
  • Polarization, phase and mode dynamic disturbance method
  • Polarization, phase and mode dynamic disturbance method

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Embodiment Construction

[0054] The present invention will be further described below in combination with specific embodiments.

[0055] Such as Figure 1-5 As shown, the system model of a polarization, phase and mode dynamic perturbation method includes a data encryption unit, a key generation unit and a data decryption unit. The data encryption unit encrypts the information and transmits it to the data decryption unit through the few-mode optical fiber for decryption and recombination; the key generation unit generates a scrambling vector.

[0056] A polarization, phase and mode dynamic perturbation method, comprising the steps of:

[0057] 1) First, the bit data stream from the user is subjected to quadrature amplitude modulation (QAM), and the bit data is mapped to symbol data;

[0058] 2) Then use Chua's multi-scroll chaotic system (formula (1), (2)) and Logistic chaotic system (formula (3)) to jointly obtain the scrambling vector, and the calculation method is formula (4)-(7);

[0059] 3) Use...

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Abstract

The invention discloses a polarization, phase and mode dynamic disturbance method, which belongs to the technical field of communication. Based on combination of a Chua's multi-scroll chaotic system and a Logistic chaotic system, different scrambling parameters are adopted to respectively carry out scrambling encryption on polarization, phase and mode in the communication system, and a decryptionsequence is generated by using a scrambling vector at a receiving end to decrypt; due to the independent operability of attraction factors and subcarriers of the Chua's multi-scroll system, the communication system can obtain a large security key space; the method has good anti-illegal reception performance, greatly improves the safety of user communication, and points out a potential road for thedevelopment of optical multicarrier in the future.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a polarization, phase and mode dynamic perturbation method. Background technique [0002] Optical fiber communication has become an important physical carrier and backbone infrastructure of network information, and more than 90% of network traffic is transmitted and transmitted through optical fiber. [0003] In recent years, OFDM (Orthogonal Frequency Division Multiplexing), or Orthogonal Frequency Division Multiplexing (OFDM), has received widespread attention in various optical systems. It realizes parallel transmission of high-speed serial data through frequency division multiplexing, and has good The capability of multipath weakening can support multi-user access. However, in scenarios such as submarine and terrestrial optical cables and user access to optical fibers, network information is at risk of being eavesdropped. Therefore, it is very necessary to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04B10/85H04L27/26
CPCH04B10/85H04L9/001H04L27/2601
Inventor 刘博忻向军任建新毛雅亚唐荣王瑞春沈磊李良川周锐王光全吴泳峰孙婷婷赵立龙
Owner NANJING UNIV OF INFORMATION SCI & TECH
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