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High-efficiency and energy-saving differential chaos communication system

A chaotic communication, high-efficiency and energy-saving technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as low DCSK transmission rate

Inactive Publication Date: 2018-04-03
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Aiming at the problem of low DCSK transmission rate, the present invention proposes a high-efficiency and energy-saving differential chaos communication system

Method used

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  • High-efficiency and energy-saving differential chaos communication system
  • High-efficiency and energy-saving differential chaos communication system
  • High-efficiency and energy-saving differential chaos communication system

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Embodiment Construction

[0017] The implementation of the present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0018] figure 1 The frame structures of the SERT-DCSK system and the traditional DCSK system are given, where Figure (a) is the DCSK frame structure, and Figure (b) is the SERT-DCSK frame structure. Comparing Figure (a) and Figure (b), it can be seen that the time of one frame of SERT-DCSK system is shorter than that of DCSK system. This is because the length of the reference time slot becomes the original 1 / P, and the length of the data time slot remains the same. Change. Data transfer rates are increased while saving bit energy. The transmission rate of the SERT-DCSK system is: The transmission rate of the DCSK system is: That is, the percentage increase of the transmission rate of the SERT-DCSK system over the DCSK system can be expressed as:

[0019]

[0020] By simplification we get:

[0021]

[0022] The b...

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Abstract

The invention provides a high-efficiency and energy-saving differential chaos communication scheme. The scheme belongs to the field of communication systems. Through effective improvement of a prior frame structure of a DCSK system, transmission time of each frame is shortened. The DCSK system subjected to transformation remains a prior frame structure; the reference time slot length is changed to1 / P(P=beta / R) of the prior length and the data time slot length remains the same. The frame structure is composed of P times duplication, which carries 2 bit information, of the sum of the referencetime slot and the reference time slot of the last frame. A demodulation terminal adopts a non-coherent demodulation method. In order to demodulate each bit of information, a synchronization clock is adopted. The received reference time slot is correlated to the corresponding data time slot and finally sending information is acquired through demodulation with a judgment threshold. Namely, if the correlation value is greater than zero, +1 is judged; if the correlation value is not greater than zero, -1 is judged. The scheme provided by the invention achieves higher transmission rate than a DCSKsystem. At the same time, lower bit energy is consumed compared with the DCSK system. Good performance of SERT-DCSK enables a good application prospect in the wireless communication field.

Description

technical field [0001] The present invention aims to design a high-efficiency and energy-saving differential chaos communication scheme (SERT-DCSK), which improves the original differential chaos shift keying (DCSK) technology so that the transmission rate is significantly improved, and the energy per bit significantly reduced. Background technique [0002] In the middle of the 19th century, chaos entered the field of vision of scientists for the first time. In 1990, the US Navy discovered the phenomenon of chaos synchronization. Since then, chaos has entered the research of digital communication. Chaos replaces the original sine and cosine signals as the carrier wave of chaotic digital communication. The generation of chaotic signals is simple, and at the same time, it has good correlation and cross-correlation. The good properties of chaos make it widely used in digital communication. [0003] At present, the most widely used in chaotic digital communication is the diff...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L27/26H04L5/00
CPCH04L5/0048H04L27/001H04L27/2613
Inventor 张刚郝怡曼曹莉易甜张天骐贺利芳
Owner CHONGQING UNIV OF POSTS & TELECOMM
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