Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Analogue signal and digital information combined transmission communication method

A digital information and analog signal technology, applied in digital transmission systems, transmission systems, electrical components, etc., to achieve the effect of improving efficiency, good narrow-band characteristics, and improving data transmission efficiency

Inactive Publication Date: 2013-04-03
NANJING NORMAL UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above systems, the carrier only plays the role of a vehicle, and has not fully exerted its effectiveness. If the carrier here can be redeveloped and utilized, and a useful information can be transmitted, the performance of the existing communication system can be greatly improved. information transmission efficiency

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
  • Analogue signal and digital information combined transmission communication method
  • Analogue signal and digital information combined transmission communication method
  • Analogue signal and digital information combined transmission communication method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0057] figure 1 , 2 is the AM broadcast transmission system implementing the method of the present invention. The content in the dotted box in the figure is the newly added part, and outside the dotted box is the existing AM broadcasting system. The difference between the transmitting end of this system and the traditional transmitting station is only in the carrier supply. The traditional method is to use a single-frequency sine wave as the high-frequency carrier, while the carrier signal with high-speed digital information is used here. First, the analog audio signal a(t) is added to the DC level M, and the high-frequency carrier provided by the carrier shaping system in the dashed box is DSB-AM modulated, and then enters the channel after passing through the band-pass filter and power amplifier. The receiving end is divided into tw...

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 discloses an analogue signal and digital information combined transmission communication method. The method comprises the combined transmitting of the analogue signal and the digital information and the receiving and demodulating of composite information, wherein the combined transmitting of the analogue signal and the digital information comprises information source encoding, channel encoding, carrier wave forming and baseband modulating. The carrier wave forming refers to directly changing the waveform of the carrier wave by using a binary information code element. A modulation waveform f1 (t) produced when the information bit is 1 and the modulation waveform f0 (t) produced when the information bit is 0 have adjustable small difference in comparison to standard sinusoidalwave. The receiving and demodulating of composite information comprises: analogue signal demodulating, digital information demodulating, channel decoding and information source decoding. The method of the invention realizes the combined transmitting of the analogue signal and the digital information and improves the utilization rate of communication transmission resource.

Description

technical field [0001] The present invention is a composite transmission communication method of analog signal and digital information based on equal-amplitude and equal-period modulation carrier, which can be applied to various communication transmission systems using sine wave as carrier. Background technique [0002] Generally, the frequency of data that needs to be sent in a communication system is low-frequency. If the data is transmitted according to the frequency of these data, it will be unfavorable for reception and synchronization. However, using the carrier transmission method, by loading the data signal on the high-frequency carrier, different The data signal directly changes the amplitude of the carrier, and the receiver receives it according to the frequency of the carrier, so that the original transmitted data signal can be extracted. [0003] However, in the above systems, the carrier only plays the role of a carrier and does not give full play to its functio...

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 Patents(China)
IPC IPC(8): H04L1/00H04B1/00
Inventor 张羽朱松盛殷奎喜
Owner NANJING NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com