OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network) physical layer encryption method based on three-dimensional Arnold transformation of conservative digital chaos

A technology of OFDM-PON and encryption method, which is applied in the field of optical communication encryption, can solve complex problems and achieve the effects of strong randomness, good security, and low peak-to-average ratio

Active Publication Date: 2021-03-05
HANGZHOU DIANZI UNIV
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  • OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network) physical layer encryption method based on three-dimensional Arnold transformation of conservative digital chaos
  • OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network) physical layer encryption method based on three-dimensional Arnold transformation of conservative digital chaos
  • OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network) physical layer encryption method based on three-dimensional Arnold transformation of conservative digital chaos

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Embodiment 1

[0041] The present embodiment provides the OFDM-PON physical layer encryption method based on the three-dimensional Arnold transformation of conservative digital chaos, such as figure 1 shown, including steps:

[0042] S11. At the transmitting end, use the initial value of the conservative digital chaotic system to generate a chaotic sequence, add disturbance to the generated chaotic sequence, and expand it into several groups of chaotic sequences, process several groups of chaotic sequences with the principal component analysis algorithm PCA, and select the first principal a chaotic sequence of components;

[0043] S12. Control the parameters of the three-dimensional Arnold transformation by the chaotic sequence of the selected first principal component, and carry out the first layer of encryption to the OFDM signal;

[0044] S13. Randomly extracting a Frank sequence to generate a chaotic Frank matrix, performing a second layer of encryption on the OFDM signal, converting th...

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Abstract

The invention discloses an OFDM-PON physical layer encryption method based on three-dimensional Arnold transformation of conservative digital chaos, and the method comprises the steps: S1, generatinga chaos sequence at a transmitting end through employing an initial value of a conservative digital chaos system, adding disturbance to the generated chaos sequence, expanding the chaos sequence intoa plurality of groups of chaos sequences, and carrying out the PCA processing of the chaos sequences, selecting a chaotic sequence of the first principal component; S2, controlling parameters of three-dimensional Arnold transformation by using the chaotic sequence of the selected first principal component, and performing first-layer encryption on the OFDM signal; S3, randomly extracting and generating a chaotic Frank matrix through a Frank sequence, performing second-layer encryption on the OFDM signal, converting the signal subjected to secondary encryption into an optical signal through an electro-optical modulator, and transmitting the optical signal to a receiving end through an optical fiber channel; and S4, converting the optical signal into an electric signal through a photoelectricdetector at a receiving end, decrypting the encrypted electric signal by utilizing the secret key, and outputting original data.

Description

technical field [0001] The invention relates to the technical field of optical communication encryption, in particular to an OFDM-PON physical layer encryption method based on three-dimensional Arnold transformation of conservative digital chaos. Background technique [0002] With the rapid development of the information society, the increase of various types of information transmission has challenged the traditional access network. Orthogonal frequency division multiplexing passive optical network (OFDM-PON) technology has the advantages of improving spectrum utilization, anti-fiber dispersion and dynamic resource allocation, so it has become a research hotspot in the next generation optical access network system. Due to the broadcast characteristics of the passive optical network (PON) structure, downlink data is easily stolen by illegal users. In addition, the OFDM signal has too high peak-to-average power ratio (PAPR), which causes nonlinear distortion when it is transm...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04B10/85
CPCH04L9/001H04B10/85
Inventor 周玉鑫毕美华何美霖卢旸杨国伟周雪芳胡淼
Owner HANGZHOU DIANZI UNIV
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