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

Degree distribution function design method of network layer fountain code and channel joint encoding

A technology of joint coding and design method, which is applied in the field of wireless transmission information security, and can solve problems such as inapplicability of degree distribution functions.

Active Publication Date: 2017-12-15
广州市端方物联科技有限公司
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An embodiment of the present invention provides a method for designing a degree distribution function of joint encoding of fountain codes and channel encoding at the network layer, which is used to solve the problem in the prior art that the traditional degree distribution function is not suitable for the joint decoding method of fountain codes and channel encoding

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
  • Degree distribution function design method of network layer fountain code and channel joint encoding
  • Degree distribution function design method of network layer fountain code and channel joint encoding
  • Degree distribution function design method of network layer fountain code and channel joint encoding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Assume that the source has sent k=1000 data packets, and is disturbed by channel noise, etc., and n=400 correct data packets are received, and the rest are all erroneous data packets. choose l max = 3, that is, 1 coded packet is adjacent to 2 error packets or 3 error packets can be adjacent with probability p c(2) or p c(3) Recover the error data packet to achieve the purpose of error correction. Parameters in the degree distribution function c=0.03, δ=0.5. Matlab is used for simulation, and the number of simulations is 2000.

[0101] The influence of channel erasure probability changes on the number of encoded packets required for decoding:

[0102] Channel deletion probability p er The change range is 0~0.95, and the step size is 0.05, and the probability p of the two error data packets adjacent to the encoded packet is restored at the same time c(2) =0.6, the probability of recovering 3 error packets p c(3) =0.2, the simulation results are as follows figure ...

Embodiment 2

[0111] Joint coding and decoding method of fountain code at network layer and channel coding at physical layer:

[0112] Assuming that the source needs to transmit k groups of data packets with verification functions, the fountain code is used to encode them at the network layer, and the fountain code at the network layer is jointly decoded with the physical layer, and l max ≤3. Its implementation method is as follows:

[0113] 1) The source sends a set of information to estimate the channel, and the channel deletion probability P is measured er and the probability P of encoding packets to recover multiple erroneous packets c(2) P c(3) .

[0114] 2) Send k groups of original data packets with error detection function to the receiving end, and the receiving end will perform error detection on the received original data packets to determine whether the data packets are correct, and count the number n of correct data packets.

[0115] 3) If n=k, then send an ACK to the sourc...

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 degree distribution function design method of network layer fountain code and channel joint encoding. The method comprises the following steps: importing a channel deletion probability and an error correction probability of MP joint decoding into an EISD degree distribution function, and determining the degree distribution function of a signal source to send an encoding packet by an expression of a channel deletion and error correction probability influence function and the expression of a Per-Pc-EISD degree distribution function; importing a strong robust factor, and determining an expanded Per-Pc-EISD degree distribution function based on the channel deletion probability and the error correction probability; performing transfer and normalization processing on the Per-Pc-EISD degree distribution function, and determining the degree distribution function of joint encoding of network layer fountain code encoding and physical layer channel encoding. According to the degree distribution function design method disclosed by the invention, when the Per-Pc-EISD degree distribution function is designed, the probability of restoring a plurality of wrong data packets during the encoding and the channel deletion probability are imported into the degree distribution function, with respect to the joint encoding method of adopting fountain code encoding on a network layer and adopting channel encoding on a physical layer, the decoding cost is effectively reduced, and the reliability and speed of wireless transmission are improved.

Description

technical field [0001] The invention relates to the technical field of wireless transmission information security, in particular to a method for designing a degree distribution function of network layer fountain code and channel joint coding. Background technique [0002] With the rapid development of modern communication technology, wireless communication technologies such as mobile communication, Internet and wireless sensor network have gradually entered people's daily life, but wireless channels will be affected by various interferences, resulting in errors in signal transmission, affecting Signal transmission quality. How to ensure the high-speed and reliable transmission of signals has become a hot spot in the research of wireless communication networks. [0003] Digital fountain code is to linearly encode data packets at the network layer according to the probability distribution. It has the characteristics of small decoding overhead and low computational complexity....

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): H04L1/00
CPCH04L1/0009H04L1/0057
Inventor 牛芳琳刘政孟云霄龚瑞雪
Owner 广州市端方物联科技有限公司
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