Orthogonal modulated chaos communication method

A technology of chaotic communication and quadrature modulation, applied in the direction of modulated carrier system, digital transmission system, electrical components, etc., can solve the problems of high bit error rate, complex structure of transmitter and receiver, etc. Improved code performance and easy hardware implementation

Inactive Publication Date: 2007-08-29
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to combine the respective advantages of QCSK and QAM, overcome the complex structure of the transmitter and receiver of the QCSK system, and the defects of high bit error rate, and propose

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
  • Orthogonal modulated chaos communication method
  • Orthogonal modulated chaos communication method
  • Orthogonal modulated chaos communication method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] The present invention will now be further explained in conjunction with the drawings.

[0022] The principle diagram of the present invention is shown in Fig. 3, where s is a single bit input signal, the bit sign is roughly +1 or -1, and the period is T b = 2N, energy is E b . After s is serialized and exchanged, it is divided into two equal-length sequences s 1 And s 2 , which is

[0023] s ( m ) 1 = s ( 2 m - 1 ) , m=1,2,…N

[0024] s ( m ) 2 = s ( 2 m ) , m=1,2,…...

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

Using Schimidt orthogonalization for chaos sequence set. The method generates a series of orthogonal basis functions as carrier waves. Then, using orthogonal amplitude modulation carries out modulation / demodulation. Features are: simple system structure, easy of realization through hardware, and higher interference killing feature than that of QCSK scheme.

Description

technical field [0001] The invention belongs to the field of chaotic signal communication, in particular to an orthogonal modulation chaotic signal communication method. technical background [0002] The proposed chaos-based quadrature modulation scheme QCSK (Quadrature Chaos Shift Keying), whose principle is shown in Figure 1, is a chaotic communication scheme corresponding to the QPSK (Quadrature Phase Shift Keying) scheme in traditional digital communication. The basic idea of ​​this scheme is to use the method of Fourier series expansion to generate two chaotic signals which are orthogonal within a certain time interval as carrier basis functions. Its modulation / demodulation part is similar to that of the DCSK scheme, and the signal constellation diagram is four-phase. Its advantage is that it does not need to transmit orthogonal signals in the channel. Compared with the DCSK (Differential Chaos Shift Keying) scheme, its bit error rate BER (Bit Error Rate) performance i...

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
IPC IPC(8): H04L27/00H04L27/36
Inventor 陈宏滨冯久超
Owner SOUTH CHINA UNIV OF TECH
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