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Secret communication system based on double chaotic modulation

A technology of secure communication and double chaos, applied in the field of secure communication system based on double chaos modulation, can solve the problems of difficult detection, low power spectral density, etc., and achieve the effects of stable performance, low cost and strong confidentiality

Active Publication Date: 2021-04-02
深圳立专技术转移中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the energy of the chaotic spread spectrum energy signal is extended to the wide-band chaotic carrier, its power spectral density is low and it is difficult to detect

Method used

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  • Secret communication system based on double chaotic modulation
  • Secret communication system based on double chaotic modulation
  • Secret communication system based on double chaotic modulation

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Embodiment Construction

[0028] In order to illustrate the embodiments of the present invention more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings.

[0029] The secure communication system of the embodiment of the present invention adopts double chaotic modulation, and uses an electro-optic switch to synthesize two different chaotic signals into one. At the receiving end, a photoelectric detector is used to convert the chaotic signal into an electrical signal and amplify it through a radio frequency amplifier. At the same time, the third chaotic laser is synchronized with the first chaotic laser, converts the chaotic signal generated by the third chaotic laser into an electrical signal, and amplifies it through a radio frequency amplifier; If it is close to 1, it is judged as 1, otherwise it is 0.

[0030] like figure 1 As shown, the secure communication system in the embodiment of the present invention inclu...

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Abstract

The invention relates to a secret communication system based on double chaotic modulation, and the system comprises: a transmitting end which comprises a first chaotic laser which is connected with acoupler, wherein the coupler is connected with a first isolator, the first isolator is connected with a photoelectric switch, a second chaotic laser is connected with a second isolator, and the secondisolator is connected with the photoelectric switch; a receiving end which comprises a third chaotic laser which is in communication connection with a circulator, wherein the circulator is in communication connection with a second photoelectric detector, the second photoelectric detector is in communication connection with a cross-correlator, the cross-correlator is in communication connection with a first radio frequency amplifier and a decision device, and the first radio frequency amplifier is in communication connection with the first photoelectric detector; and a circulator which is in communication connection with the coupler, wherein the photoelectric switch is in communication connection with the first photoelectric detector. According to the invention, double chaos is utilized tospread spectrum of digital information, identical chaotic sequences are synchronously generated, and after the sending end receives information modulation, the receiving end utilizes synchronous local signals to demodulate the information, so that secret communication is realized.

Description

technical field [0001] The invention belongs to the technical field of secure communication and information security, and in particular relates to a secure communication system based on double chaotic modulation. Background technique [0002] Chaos is a deterministic quasi-random process. The communication using chaotic sequence as carrier has good application prospects in the field of secure communication because of its characteristics of noise-like, broadband, good correlation, and unpredictable long-term behavior. [0003] When the chaotic spread spectrum can spread the energy of the signal to the wideband chaotic carrier, its power spectral density is low and it is difficult to detect. Contents of the invention [0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a secure communication system based on double chaotic modulation. [0005] In order to achieve the above-mentioned purpose of the invention, the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04B10/50H04B10/60H04B10/80
CPCH04L9/001H04B10/503H04B10/801H04B10/60
Inventor 李齐良唐艺文董文龙胡淼唐向宏曾然
Owner 深圳立专技术转移中心有限公司
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