Repetitive correlation delay shift keying method for improving performance of wireless chaos communication system

A related delay and chaotic communication technology, applied in wireless communication, secure communication through chaotic signals, transmission system, etc., can solve problems such as adding delay units, poor bit error performance, and hardware complexity

Active Publication Date: 2017-01-18
SUN YAT SEN UNIV
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the system needs to add delay units and multipliers, greatly increasing the hardware complexity
The literature "Q.Ding, J.N.Wang, Design of frequency-modulated correlation delay shift keying chaotic communication system [J], IET Communications, 5(7), 2011, 901-905" combines frequency modulation and CDSK, and proposes frequency modulation chaotic difference Keying modulation technology 0 (Frequency Modulation CDSK, FM-CDSK), improves security performance and transmission rate, but its bit error performance is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Repetitive correlation delay shift keying method for improving performance of wireless chaos communication system
  • Repetitive correlation delay shift keying method for improving performance of wireless chaos communication system
  • Repetitive correlation delay shift keying method for improving performance of wireless chaos communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0036] Such as image 3 As shown in , the transmitter of R-CDSK continues to transmit the linear operation symbols of the chaotic modulation signal and the chaotic reference signal. The difference from CDSK is that for the same information bit, the R-CDSK transmitter controls the switch and sends the differential modulation symbols representing the same bit of information twice in a row: the first time is the sum of the chaotic reference signal and the chaotic modulation signal, and the second time is the sum of the chaotic reference signal and the chaotic modulation signal. The second is the difference between the two, and its mathematical expression is as follows:

[0037] S i = ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a repetitive correlation delay shift keying method for improving performance of a wireless chaos communication system. According to the method, a switch is added to a correlation delay shift keying (CDSK) emission end, namely an emission end of a repetitive correlation delay shift keying R-CDSK is in two symbol periods, a chaos modulation signal and a differential chaos modulation signal corresponding to one same information are continuously sent, and a common reference chaos signal of the chaos modulation signal and the differential chaos modulation signal is further sent. The method makes full of time diversity of a wireless channel, a transmission bit error rate is reduced through repetitively sending the mutually-differential chaos modulation signals, CDSK reliability is effectively improved, moreover, the information sent by the R-CDSK is a differential modulation symbol of the bearing information, so safety communication performance of the system is improved. Compared with schemes in the prior art, the method has relatively lower complexity, and an information transmission mode which is more reliable than a CDSK mode and is safer than a DCSK mode is realized.

Description

technical field [0001] The invention faces the field of wireless chaotic communication, and proposes an improved repetitive correlation delay keying modulation method for improving system reliability and security. Background technique [0002] Due to the broadcast characteristics of wireless channels, information transmission is vulnerable to malicious attacks and malicious eavesdropping. Chaotic sequences have been widely used in high-security wireless communication systems due to their characteristics of initial value sensitivity, aperiodicity, and infinite length. The technique of modulating signal with chaotic sequence can be divided into coherent chaotic modulation and incoherent chaotic modulation. Among them, the incoherent chaotic modulation has stronger practicability because it does not need to use a complex chaotic synchronization circuit at the receiving end to reply to the reference chaotic signal. [0003] Among the existing incoherent chaotic modulation tech...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04W24/06H04J13/00
CPCH04J13/0018H04L9/001H04W24/06
Inventor 张琳饶伟炜沈金田
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap