Efficient and reliable physical layer encryption high speed optical communication system

Abstract

The invention discloses an efficient and reliable physical layer encryption high speed optical communication system, which comprises an optical OFDM (Orthogonal Frequency Division Multiplexing) encryption system and a high spectral efficiency transmission system, wherein the optical OFDM encryption system configures a character inside a high-dimension OFDM encryption signal system according to aninitial condition, then receives data, maps an encryption sequence and forms an encryption matrix through an input key in sequence, and encrypts the acquired data; and the acquired data are subjectedto serial and parallel conversion, character mapping and interpolation piloting. According to the physical layer encryption-based CO (Coherent Optical)-OFDM and Nyquist-WDM transmission system disclosed by the invention, the system makes a systematic research from a research on a physical layer encryption algorithm, synchronization of an OFDM signal and a Nyquist signal and secure transmission ofoptical signals of big data, and has the characteristics of high security, high spectral utilization rate, high access capacity and the like in combination with fiber access.

Description

technical field [0001] The invention relates to an efficient and reliable physical layer encryption high-speed optical communication system. Background technique [0002] With the continuous development of communication services, the demand for communication access bandwidth and capacity continues to increase, and optical communication networks have become an important part of the new generation of trusted network structures. In the past two decades, the data traffic of the global Internet has increased by 100% every year, and it is estimated that the capacity of a single optical fiber in the backbone network will exceed 100 Tbit / s around 2020. On the basis of existing technologies and devices, adopting "super channel" technology combined with coherent detection and polarization multiplexing schemes, and at the same time improving the spectral efficiency and receiver sensitivity, thereby increasing the capacity of optical fiber transmission has become the focus of the indust...

AI Technical Summary

Problems solved by technology

[0004] The research work on integrating the physical layer encryption mechanism into CO-OFDM and Nyquist-WDM high-speed long-distance optical communication systems has not been reported yet, and the research on high-dimensional signal encryption modulation and avalanche effect leading to bit error diffusion and packet physical layer encryption methods is still far away. not enough

On the other hand, the physical layer security theory shows that channel coding can improve the security of the system, but in the system of traditional layered design, the channel coding at the receiving end is placed before the decryption algorithm, and the error analysis cannot enter the cryptographic algorithm module and cannot realize the system. Further Improvements in Security

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