Raptor code method of system unequal error protection

An error protection and systematic code technology, applied in the direction of error prevention, transmission system, digital transmission system, etc., to achieve the effect of maintaining excellent decoding performance and increasing the amount of calculation

Inactive Publication Date: 2015-01-28
COMMUNICATION UNIVERSITY OF CHINA
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention can solve the limitation of the implementation method of the unequal error protection Raptor code in the existing 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
  • Raptor code method of system unequal error protection
  • Raptor code method of system unequal error protection
  • Raptor code method of system unequal error protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited in any form. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art through several modifications and improvements without creative efforts all belong to the protection scope of the present invention.

[0045] source symbol sequence (X 1 , X 2 ,...,X K ) length is K. Without loss of generality, r=2 is taken, that is, the source symbol sequence is divided into subsequences of two protection levels: the first category (X 1 1 , X 2 1 ,...,X K1 1 ) and Category 2 (X 1 2 , X 2 2 ,...,X K2 2 ), of which category 1 has a higher level of protection than category 2. The lengths of the sequences of type 1 and type 2 are K1 and K2 respectively, and K1+K2=K. The present invention is the unequal error protection Raptor code encodin...

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 Raptor code method of system unequal error protection. The Raptor code method of the system unequal error protection solves the problems that an existing Raptor code method of the system unequal error protection either modifies degree distribution and structure of standard system Raptor codes and damages code word performance, or uses a standard system Raptor encoder to distribute different amounts of redundancy (code rate) for different important data and causes difficulty and waste of redundancy data distribution. According to the Raptor code method of the system unequal error protection, coding is performed based on a standard system Raptor coding algorithm, an algorithm similar to window extension is used for a middle symbol, the unequal error protection for a source symbol is achieved, decoding is performed by only slightly modifying a generation matrix, and a standard system Raptor decoder is still used. The Raptor code method of the system unequal error protection has the advantages of being achieved completely through standard system Raptor code stepping coding and decoding, especially performing the increment decoding according to the classification of the protected degree of the source symbol, and simultaneously maintaining the advantages of original degree distribution, high efficiency of coding and decoding and the like of the standard system Raptor encoder and the standard system Raptor decoder, and achieving the high efficiency unequal error protection.

Description

technical field [0001] This application relates to a Raptor code method for system unequal error protection, which can be widely used in digital communication, audio and video communication, multicast or unicast communication systems. Background technique [0002] Raptor code is the most mature and advanced fountain code technology. Luby and Shokrollahi and others proposed and formed the international standard RFC5053 (later called "standard system Raptor code" or "standard Raptor code"), which was adopted by more than a dozen digital communication standards ( Such as 3GPP MBMS and DVB-H) adopted as the upper AL-FEC scheme, can significantly improve the anti-error performance and robustness of the entire communication system. The systematic code can restore the source data to the greatest extent when the decoding fails, so the systematic code is an important form of FEC coding. The degree distribution of the standard system Raptor code is carefully designed to ensure a very...

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): H03M13/37H04L1/00
Inventor 石东新王非非张远杨占昕赵艳明史萍
Owner COMMUNICATION UNIVERSITY OF CHINA
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