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

Symbol modulation mode detection method and device in OFDM system

A technology of symbol modulation and modulation mode, applied in the field of communication, can solve the problem of low accuracy of symbol modulation mode of OFDM system

Inactive Publication Date: 2020-05-29
BEIJING UNIV OF POSTS & TELECOMM
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the signal transmitted in the channel is easily affected by channel interference such as signal reflection, refraction, fading, etc., resulting in low accuracy of the detected symbol modulation in the OFDM system

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
  • Symbol modulation mode detection method and device in OFDM system
  • Symbol modulation mode detection method and device in OFDM system
  • Symbol modulation mode detection method and device in OFDM system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0063] Because in the prior art, when detecting the symbol modulation mode in the OFDM system, the detection result will be affected by channel interference, and the accuracy of the detected symbol modulation mode in the OFDM system is low. In order to solve this problem, this paper The embodiment of the invention provides a method and device for detecting a symbol modulation mode in an OFDM system.

[0064] In one embodiment of the present invention, a method...

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 embodiment of the invention provides a symbol modulation mode detection method and device in an OFDM system, and relates to the technical field of communications. The method comprises the following steps: from signals transmitted by a channel, acquiring a signal transmitted in a time period of a preset time length, using the signal as a to-be-detected signal, performing orthogonal frequency division multiplexing OFDM demodulation on the to-be-detected signal; obtaining a demodulated signal, calculating the ratio of the amplitude of a frequency domain symbol located on each adjacent subcarrier in the demodulated signal in each sub-time period contained in the time period in the sub-time period, and detecting the symbol modulation mode of the to-be-detected signal according to each ratioobtained through calculation. By applying the scheme provided by the embodiment of the invention to detect the symbol modulation mode of the signal, the accuracy of the symbol modulation mode detection result in the OFDM system can be improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for detecting symbol modulation modes in an OFDM system. Background technique [0002] When the signal transmitter sends a signal to the signal receiver, the original signal is modulated by symbols in the OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system, and then OFDM is modulated, and the modulated signal is sent to the signal through the channel. Receiving end. After receiving the signal, the signal receiving end demodulates the received signal through the OFDM demodulation method corresponding to the OFDM modulation method used in the above modulation process to obtain the demodulated signal, and uses the OFDM demodulation method corresponding to the symbol modulation method In the symbol demodulation mode, the demodulated signal is symbol demodulated to obtain the original signal. In this way, th...

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): H04L27/00H04L27/26
CPCH04L27/0012H04L27/2601H04L27/2649
Inventor 王生楚郭琪
Owner BEIJING UNIV OF POSTS & TELECOMM
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