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Chaotic secure communication method with high-order modulation format

A high-order modulation, secure communication technology, applied in the field of optical communication, can solve the problems of reducing spectrum utilization rate and transmission rate, reducing system security, etc., to achieve the effect of improving system transmission rate and spectrum utilization rate, and enhancing security strength

Active Publication Date: 2022-02-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This reduces the security of the system to a certain extent
At the same time, this method is only suitable for simple OOK modulation format and single polarization state transmission method
Therefore, the spectrum utilization rate and transmission rate of the system are reduced (for example, the current maximum transmission rate is only 30Gbit / s)

Method used

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  • Chaotic secure communication method with high-order modulation format
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Embodiment Construction

[0036]In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without ...

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Abstract

The invention provides a high-order modulation format chaos security communication method, including a generation method and a demodulation method of the high-order modulation format chaos security signal. The generation method of the high-order modulation format chaotic secret signal includes: chaotic laser generation, photoelectric detection, chaotic encryption, chaotic cover, electro-optical modulation and polarization multiplexing. The demodulation method of chaotic secret signal with high-order modulation format includes: generation of synchronous chaotic laser, coherent detection of secret signal and digital signal processing. The invention can realize high-speed and long-distance transmission of multiple high-order modulation formats polarization multiplexing confidential signals while improving signal security.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a high-order modulation format chaos security communication method. Background technique [0002] Laser chaos has the characteristics of noise-like characteristics, extremely sensitive initial conditions, and unpredictable characteristics. It has important applications in the fields of secure communication and high-speed physical random numbers. In laser chaos secure communication, the noise-like characteristics of chaotic laser can be used to realize the secure transmission of information by means of chaotic keying, chaotic modulation and chaotic masking. At present, most of the chaotic masking methods directly superpose laser chaotic signals and optical signals in the optical domain. For example, in 2005, the European Union team used laser chaotic signals generated by semiconductor lasers and 1Gbit / s OOK optical signals to cover up and realized 120 kilometers of confidenti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04B10/50H04B10/516H04B10/61
CPCH04L9/001H04B10/503H04B10/516H04B10/61
Inventor 易安林闫连山王安帮盘艳蒋林罗斌潘炜
Owner SOUTHWEST JIAOTONG UNIV