Encoding and decoding method of online fountain codes with unequal error protection strategy

A codec method and error protection technology, applied in the direction of error prevention, digital transmission systems, electrical components, etc., can solve the problems of LISs performance degradation, low decoding overhead, etc., to improve system performance, reduce decoding overhead, and improve communication quality effect

Active Publication Date: 2022-07-15
SHANGHAI JIAOTONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the problem in the current research work is that the unequal error protection performance is achieved by selecting MISs to participate in encoding with a higher probability. Compared with LISs, MISs can be decoded faster and have lower decoding overhead. Thus leading to high priority of MISs at the cost of reduced performance of LISs

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
  • Encoding and decoding method of online fountain codes with unequal error protection strategy
  • Encoding and decoding method of online fountain codes with unequal error protection strategy
  • Encoding and decoding method of online fountain codes with unequal error protection strategy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0080] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0081] In this example, there are a total of 1000 source code symbols, marked with serial numbers 1, 2, ..., 1000, which are divided into MISs and LISs according to different degrees of importance, where MISs are serial numbers 1 to 500, and LISs are serial numbers 501 to 1000. Preset parameter α 0= 0.65, which determines the number of elements in the maximum connection group in MISs. The specific steps are:

[0082] Step A: The encoder selec...

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 present invention relates to a method for encoding and decoding an online fountain code with unequal error protection strategy, comprising: step A: an encoder selects a window W according to an extended window strategy 1 or W 2 , the coded symbol with coding degree 2 is sent to the receiving end; Step B: the receiving end receives the coded symbol with coding degree 2 and the corresponding source code symbol sequence number and is used to form different connection groups; Step C: Repeat step A and step B, When the number of elements in the connection group with the largest number of elements in MISs reaches the preset value k 1 alpha 0 When the receiving end feeds back to the encoding end, the encoding end stops encoding and sending the coded symbols with the coding degree of 2 after receiving the feedback; Step D: the coding end obtains the coded symbols with the coding degree of 1 from the MISs and sends it to the receiving end; Step E : The receiving end receives the coded symbol with a coding degree of 1 and the corresponding source symbol serial number and uses it to decode the connection group, etc. Compared with the prior art, the present invention has the advantages of reducing decoding overhead on the premise of ensuring unequal error protection performance.

Description

technical field [0001] The present invention relates to the field of channel coding of wireless communication technology, in particular to an on-line fountain code coding and decoding method with unequal error protection strategy. Background technique [0002] Fountain code is a rateless code, which can continuously generate coded symbols from k source symbols. When the receiving end receives slightly more than k coded symbols, the source symbols can be solved, so it can well cope with changes in packet loss rate. network transmission environment. The online fountain code adjusts the coding strategy in time through the feedback of the receiver to keep it optimal in real time and further improves the reliability of transmission. Traditional online fountain codes provide equal error protection and equal recovery time for all source symbols. [0003] However, in the case of video coding and communication, some more important symbols in the decoding process require a higher sy...

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): H04L1/00
CPCH04L1/007
Inventor 丁良辉段一凡杨峰钱良
Owner SHANGHAI JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap