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

Visible light communication method

A visible light communication and visible light technology, applied in the field of visible light communication, can solve limitations and other problems, achieve the effect of improving transmission capacity, improving practicability, and improving system performance

Inactive Publication Date: 2017-05-24
WUHAN POST & TELECOMM RES INST CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing schemes for solving multipath interference in visible light communication are mostly proposed based on the multiple-input multiple-output system structure, which increases the complexity of the system sending end and receiving end, consumes the system bandwidth, and makes visible light technology practical. application is limited

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
  • Visible light communication method
  • Visible light communication method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] On the basis of maintaining the original system complexity and bandwidth consumption in the whole system, the present invention improves the performance and stability of the visible light communication system through the space diversity technology in the environment of multipath interference; Diversity gain, thereby improving the performance of the entire system, neither increasing system overhead nor affecting its anti-noise capability, effectively enhancing the adaptability of visible light communication technology in actual environments.

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] A visible light communication method based on signal space diversity coding provided by the present invention includes the following steps:

[0042] Step S10, at the sending end, perform OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) encoding o...

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 a visible light communication method, which comprises the steps of: at a transmitting end, subjecting a data stream to OFDM coding based on space diversity coding, modulating OFDM codes to obtain a visible light signal by means of a single LED light source, and transmitting the visible light signal; at a receiving end, converting the received visible light signal into an analog electric signal by means of a single photodiode, converting the analog electric signal into a digital signal, demodulating the digital signal by means of OFDM data symbols to obtain OFDM data symbols, demodulating the OFDM data symbols based on space diversity coding, and restoring the original data stream. The visible light communication method fully utilizes the technical features of the signal space diversity coding, encodes real portions and virtual portions of transmitted signals so that the real portions and virtual portions are independent from each other, realizes the purpose of forming a diversity effect by just using a single receiver for receiving in a multi-path interference environment, effectively improves the transmission capability of signals in a frequency selective fading channel, improves the adaptability of a visible light communication system and enhances the system performance integrally.

Description

technical field [0001] The present invention relates to a visible light communication system, in particular to a visible light communication method. Background technique [0002] Visible light communication (VLC) is a new type of wireless optical communication technology developed on the basis of white light LED technology. Visible light communication has the advantages of strong confidentiality, no electromagnetic interference, and no need for spectrum certification. It has a wide range of applications in wireless optical local area networks, underwater communications, indoor navigation, and information broadcasting. However, due to the characteristics of visible light communication technology, there are still many shortcomings in itself, such as limited modulation bandwidth, optical background noise, multipath interference, etc., especially the multipath interference caused by using multiple light sources for illumination. In visible light communication systems, frequency...

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): H04B10/116H04B10/516H04B10/60
CPCH04B10/116H04B10/516H04B10/60
Inventor 杨超
Owner WUHAN POST & TELECOMM RES INST CO LTD
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