Improved type differential chaos shift keying DCSK confidentiality communication method

A differential chaotic keying and secure communication technology, which is applied to secure communication devices, digital transmission systems, electrical components, etc., can solve the problems of low transmission rate and poor confidentiality

Inactive Publication Date: 2014-07-02
CHONGQING UNIV OF POSTS & TELECOMM
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However, its transmission rate is

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  • Improved type differential chaos shift keying DCSK confidentiality communication method
  • Improved type differential chaos shift keying DCSK confidentiality communication method
  • Improved type differential chaos shift keying DCSK confidentiality communication method

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Embodiment Construction

[0032] A non-limiting embodiment is given below in conjunction with the accompanying drawings to further illustrate the present invention.

[0033] DCSK is currently the most researched chaotic keying security communication system. The system structure is simple, the bit error rate is low, and the anti-interference ability is strong. The signal and the information signal are the same or opposite, so the channel confidentiality is low. After the transmitted information is intercepted, it is easy to decipher the transmission signal through analysis, and only 1 bit of information can be transmitted in one cycle, resulting in low channel utilization and transmission speed. Aiming at the confidentiality problem of DCSK, after improvement, the information is scattered and transmitted on two channels, and the reference signal of each channel of information is transmitted on the other channel, so that even if a channel of information is intercepted during transmission, the original sig...

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Abstract

The invention discloses a confidentiality communication method based on an improved type DCSK, and belongs to the technical field of signal transmission. In response to the confidentiality problem of the DCSK, after the improvement, information is scattered to two communication channels to be transmitted, a reference signal of the information in each channel is transmitted in the other channel, so that even the information in one channel is intercepted and captured in the transmission process, the original signal cannot be decoded, and the problem of low channel utilization rate is solved. Through the comparison of the original system bit error rate with the improved system bit error rate, the bit error rate of the improved type DCSK system is lower than the bit error rate of the traditional system in the data transmission process, and the channel utilization rate is much higher and confidentiality is much stronger. Through simulation it can be seen that the simulation result is consistent with the theoretical analysis, and confidentiality is greatly enhanced. Meanwhile, the improved type differential chaos shift keying DCSK confidentiality communication method is relatively low in complexity, easy for the project to be realized, and will has wide application prospect in the fields of images, military confidential information and the like.

Description

technical field [0001] The invention relates to a data communication system, and more specifically relates to a chaotic secure communication method using improved differential chaotic keying to send and receive data. Background technique [0002] Since 1990, chaos communication and chaos synchronization technology has become a research hotspot in international and domestic communication. The development of chaos synchronization control theory has laid a theoretical foundation for the application of chaos in the field of communication. Secure communication using synchronized chaos is a hot topic in current international research. The synchronous chaos communication that has been proposed and developed so far is mainly divided into: chaos concealment, chaos parameter modulation, chaos keying and chaos spread spectrum. Chaos masking belongs to chaotic analog communication, and the other three categories belong to chaotic digital communication. Chaos masking is a chaotic secu...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L9/28
Inventor 张刚王源张天骐贺利芳李波王颖
Owner CHONGQING UNIV OF POSTS & TELECOMM
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