Self-adaptive decryption optical encryption transmission system and method based on optical self-interference elimination

A technology of self-interference elimination and encrypted transmission, applied in optical transmission systems, transmission systems, digital transmission systems, etc., can solve the problems of increasing the risk of attack, interception, and suppressing the reduction of bandwidth, so as to improve flexibility, security, and simplification. Architecture, the effect of good security performance

Active Publication Date: 2021-05-28
SHANGHAI JIAO TONG UNIV
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  • Application Information

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Problems solved by technology

Although this prior art solves the problem of severely reducing the suppression bandwidth caused by uneven wireless channels, it will greatly increase the risk of being attacked and intercepted by attackers in the entire passband

Method used

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  • Self-adaptive decryption optical encryption transmission system and method based on optical self-interference elimination
  • Self-adaptive decryption optical encryption transmission system and method based on optical self-interference elimination
  • Self-adaptive decryption optical encryption transmission system and method based on optical self-interference elimination

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Embodiment 1

[0052] according to figure 1 , figure 2 As shown, the present invention provides an adaptive deciphering optical encryption transmission system based on optical self-interference elimination, comprising:

[0053] Transmitter module: Based on the dual-drive Mach-Zehnder modulator architecture, electrical delay and electrical attenuation devices are used to adjust the delay and attenuation of analog noise, and the signal is encrypted as a two-dimensional orthogonal key, and the Byron electric inverter will The signal is inverted to generate an optically encrypted signal inside a dual-drive Mach-Zehnder modulator.

[0054] Optical fiber transmission module: complete the optical fiber transmission and transmission damage compensation of the optical encrypted signal from the sending end to the receiving end;

[0055] Receiver module: Based on the adaptive optical self-interference cancellation architecture, by running the equilateral triangle algorithm, adaptively adjust the del...

Embodiment 2

[0072] This embodiment provides an optical analog encrypted transmission system. The transmitting end module and the receiving end module respectively encrypt and decrypt the signal through the optical method, and at the same time, the receiving end module also performs adaptive key encryption through the adaptive regular triangle algorithm. Search. in:

[0073] The signal encryption process of the transmitter module is based on the signal combination of the dual-drive Mach-Zehnder modulator. The combination principle can be summarized as follows: The phases of the upper and lower arms of the dual-drive Mach-Zehnder modulator can be expressed as:

[0074]

[0075]

[0076] Among them, V1 and V2 represent the driving voltages of the upper and lower ports of the dual-drive Mach-Zehnder modulator architecture respectively, and the driving voltage is the DC bias voltage V BIAS and the sum of the radio frequency RF voltage. V 0 Represents an inherent voltage inside the dua...

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Abstract

The invention provides a self-adaptive decryption optical encryption transmission system based on optical self-interference elimination, and the system comprises a sending end module which is based on a dual-drive Mach-Zehnder modulator architecture, employs electric delay and electric attenuation to adjust analog noise as a two-dimensional orthogonal key, and completes the analog optical encryption of a useful signal; the optical fiber transmission module completes radio over fiber transmission of an optical signal from a sending end to a receiving end and compensation of transmission damage; and a receiving end module adaptively finds an optimal key by operating a regular triangle algorithm according to the quality of demodulated useful signals and dynamically adjusting the delay and attenuation of a receiving end reference path based on an adaptive optical self-interference elimination architecture, and completes adaptive receiving of the useful signals and adaptive elimination of analog noise. According to the invention, key distribution between the receiving end and the transmitting end is not needed, and the transmitting encryption end can modify the encryption key at any time, so that the complexity and the cost of the whole system are greatly reduced, and the anti-interference performance and the flexibility of the whole system are improved.

Description

technical field [0001] The present invention relates to the technical field of microwave photonics optical fiber transmission, in particular to an adaptive decryption optical encryption transmission system and method based on optical self-interference elimination, especially to an adaptive decryption analog optical encryption transmission based on optical self-interference elimination systems and methods. Background technique [0002] With the rapid development of mobile communication technology, wireless services have experienced explosive growth. At the same time, users have put forward higher and higher requirements for the stability and security of the transmission system. How to communicate between various networks and users The secure transmission of data between them has become an important research topic. Optical analog encryption technology has the advantages of low delay and low cost, and is widely used in secure communication transmission. Commonly used optical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/85H04B10/69H04L9/08
CPCH04B10/50575H04B10/85H04B10/697H04L9/0869
Inventor 郑立卓刘智洋肖石林张之仪
Owner SHANGHAI JIAO TONG UNIV
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