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

Communication method and communication device

A communication method and technology of a communication device, applied in wireless communication, multiplexing communication, transmitting/receiving signals by adding signals to waves, etc., can solve difficult communication quality, low frequency band transmission rate, and inability to change primary modulation Modulation method and other issues, to achieve the effect of maintaining communication quality and high level

Inactive Publication Date: 2001-11-07
MITSUBISHI ELECTRIC CORP
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now, as such a power line modem, it is considered to use the SS (Spread Spectrum-spread spectrum) method, but, in the case of using this method, for example, there is such a problem that since the spectrum of the provided frequency band has been used up, the It is difficult to coexist with other communication methods; the transmission rate corresponding to the frequency band used is low, etc.
[0005] However, in the above-mentioned communication method using the conventional multi-carrier communication method, the modulation method in the primary modulation cannot be selectively changed.
Therefore, in a communication environment where the influence of noise is large, the communication quality can be improved by transmitting the same data or shifting tones on multiple carriers. However, for example, in a communication environment where the influence of noise spreads over a wide range In some cases, these measures cannot overcome the influence of noise, and there is a problem that the communication quality above a certain level cannot be maintained.
[0006] In particular, in communication environments such as power line communication; indoor communication in navigation equipment, computers, ITS communication devices, and other electronic devices installed in automobiles, etc.; communication in trains such as electric trains, etc., from other devices such as inverters The noise level is relatively large, and the noise exists in a wide range and fluctuates. As a result, it is difficult to maintain communication quality above a certain level, and it is required to use anti-noise measures other than the above

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
  • Communication method and communication device
  • Communication method and communication device
  • Communication method and communication device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] FIG. 9 is a flow chart of Embodiment 1 of the communication method involved in the present invention (Example 1: Part 2);

example 2

[0031] Fig. 10 is a flow chart of embodiment 1 of the communication method involved in the present invention (example 2: one);

[0032] FIG. 11 is a flow chart of Embodiment 1 of the communication method involved in the present invention (Example 2: Part 2);

[0033] Fig. 12 is a flowchart of embodiment 1 of the communication method involved in the present invention (example 3: one);

[0034] FIG. 13 is a flow chart of Embodiment 1 of the communication method involved in the present invention (Example 3: Part 2);

[0035] FIG. 14 is a flowchart of Embodiment 1 of the communication method involved in the present invention (Example 4: one);

example 4

[0036]FIG. 15 is a flowchart of Embodiment 1 of the communication method involved in the present invention (Example 4: Part 2);

[0037] Fig. 16 is a flow chart of embodiment 2 of the communication method involved in the present invention (example 1: one);

[0038] FIG. 17 is a flow chart of Embodiment 2 of the communication method involved in the present invention (Example 1: Part 2);

[0039] FIG. 18 is a flowchart of Embodiment 2 of the communication method involved in the present invention;

[0040] FIG. 19 is a flowchart of Embodiment 2 of the communication method involved in the present invention (Example 2: one);

[0041] FIG. 20 is a flow chart of Embodiment 2 of the communication method involved in the present invention (Example 2: Part 2);

[0042] FIG. 21 is a flowchart of Embodiment 2 of the communication method involved in the present invention (Example 3: one);

[0043] Fig. 22 is a flow chart of Embodiment 2 of the communication method involved in the present...

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

A communication method including a first tone set moving step of monitoring a transmission line in a steady communication state and moving a tone set if there is no tone ensuring a predetermined S / N ratio, a second tone set moving step of not moving a tone set if there are at least two tones ensuring the S / N ratio and moving a tone set if there is one tone ensuring the S / N ratio and if it is judged that the communication quality can be maintained by moving the tone set in the same tone group, and a tone group moving step of moving a tone group if it is judged that the communication quality cannot be maintained even if the tone set is moved in the same tone group.

Description

technical field [0001] The present invention relates to the communication method that adopts multi-carrier modulation and demodulation mode, in particular, relates to modulation and demodulation mode and OFDM (Orthogonal Frequency Division Multiplex-orthogonal frequency division multiplexing) modulation and demodulation mode through DMT (Discrete Multi Tone-discrete multi-audio frequency) A communication method for realizing data communication using an existing power line by means of an adjustment method, and a communication device for realizing the communication method. However, the present invention is not limited to communication devices that perform power line communication, but can be applied to all communication devices that perform wired communication and wireless communication via normal communication lines by multi-carrier modulation and demodulation and single-carrier modulation and demodulation. Background technique [0002] A conventional communication method wil...

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): H04B3/54H04J11/00H04L5/02H04L27/26
CPCH04L5/0007H04L5/0046H04L5/006H04B2203/5416H04B3/54H04L5/023H04W24/02
Inventor 加藤正孝小林刚小泉吉秋松本涉
Owner MITSUBISHI ELECTRIC CORP
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