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MIMO secret communication method based on differential chaos shift keying

A differential chaotic keying and secure communication technology, applied in secure communication devices, digital transmission systems, electrical components, etc., can solve problems such as low transmission rate, poor confidentiality, and unsatisfactory bit error performance

Inactive Publication Date: 2014-08-27
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, due to the need to transmit the reference signal, there are problems such as low transmission rate and poor confidentiality, which proves that the bit error performance of the DCSK system in the channel of Gaussian white noise is not ideal

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  • MIMO secret communication method based on differential chaos shift keying
  • MIMO secret communication method based on differential chaos shift keying
  • MIMO secret communication method based on differential chaos shift keying

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Embodiment Construction

[0025] A non-limiting embodiment is given below in conjunction with the accompanying drawings to further illustrate the present invention.

[0026] refer to Figure 1-8 As shown, 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 transmitted reference signal is the same or opposite to the information signal, 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 channel utilization and transmission speed. lower. 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 informat...

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Abstract

The invention discloses an MIMO secret communication method based on differential chaos shift keying (DCSK). Due to improvement, information is made to be dispersed on two channels for transmission, the reference signal of each way of information is transmitted on the other way, and therefore even when a certain way of information is intercepted in the transmission process, an original signal can not be decoded, and meanwhile, the problem that the utilization rate of the channels is low is solved. Meanwhile, in order to solve the multi-path fading problem, the MIMO technology is used for suppressing the channel noise and the multi-path fading, and the system bandwidth and the transmission power do not need to be increased. By comparing the bit error rate of an original system with the bit error rate of an improved system, it is found that the bit error rate of the MIMO-DCSK secret communication system is lower than that of a traditional system in data transmission, meanwhile, the utilization rate of the channels is higher, and the secrecy is higher.

Description

technical field [0001] The invention relates to a data communication system, and more specifically relates to a chaotic secure communication system which uses MIMO technology and is applied to an improved differential chaotic keying to transmit and receive data. Background technique [0002] Since 1990, chaotic communication 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. [0003] Chaos masking belongs to chaotic analog communication, and the other three categories belong to chaotic digital communication. Chaos maski...

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Application Information

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IPC IPC(8): H04L9/00
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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