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

LT code and multi-connection combined low-delay channel coding method

A channel coding and multi-connection technology, applied in the field of low-latency channel coding, can solve the problems of waste of wireless resources and huge transmission delay, and achieve the effect of reducing the number of wireless resources and the bit error rate

Active Publication Date: 2021-11-05
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the huge transmission delay caused by several retransmissions during HARQ transmission and the large waste of wireless resources caused by multi-connection transmission, and proposes a low-delay channel combining LT codes and multi-connections encoding method

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
  • LT code and multi-connection combined low-delay channel coding method
  • LT code and multi-connection combined low-delay channel coding method
  • LT code and multi-connection combined low-delay channel coding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]A low-delay channel coding method combining LT codes and multiple connections described in the present invention optimizes the degree distribution function of the LT code, that is, determines the degree distribution function of the joint degree distribution of the double-scale coefficients, and determines the optimal Optimum proportionality coefficients, using the optimized degree distribution function to generate coded symbols, which are transmitted through two links, and the coded symbols received in the two links are combined at the receiving end to perform confident hard-decision decoding. This method achieves better performance than HARQ and traditional multi-connection in terms of decoding delay and communication system stability indicators. The LT code after optimizing the degree distribution function has achieved a significant reduction in bit error rate during transmission. Overhead can be lower than 10 at 0.5 -5 .

[0044] During specific implementation, suppo...

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 relates to an LT code and multi-connection combined low-delay channel coding method, and belongs to the technical field of channel coding. According to the method, the degree distribution function of the LT code is optimized, namely, the degree distribution function of double-proportionality coefficient joint degree distribution is determined. And determining an optimal proportionality coefficient according to a channel condition. Then the coded symbols are generated by using the optimized degree distribution function, and the coded symbols are transmitted through two links, and the coded symbols received in the two links are mixed at a receiving end, thereby carrying out confidence hard decision decoding. According to the method, better performance is achieved in terms of indexes of decoding delay and communication system stability compared with HARQ and traditional multi-connection, the bit error rate of the LT code after optimization of the degree distribution function is remarkably reduced during transmission, and the decoding overhead can be lower than 10<-5> when reaching 0.5.

Description

technical field [0001] The invention relates to a low-delay channel coding method combining LT codes and multiple connections, and belongs to the technical field of channel coding. Background technique [0002] Fountain codes (Fountain Codes) is an effective channel coding method, including LT codes, Raptor codes and online fountain codes and other code types. The sender can randomly select d from k source symbols for XOR operation to generate an infinite number of encoded symbols, and the receiver can recover the source symbols from any n encoded symbols, where n is slightly greater than k. Compared with the traditional channel coding method with a fixed code rate, the code rate of the fountain code can be adaptively changed according to the channel conditions without pre-obtaining channel state information, so it is widely used in multimedia communication, satellite communication, data distribution and other scenarios. [0003] With the advancement of technology and the d...

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): H04L1/00
CPCH04L1/0009H04L1/0056
Inventor 韩航程刘昕澔卢继华孙磊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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