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

Wireless measurement-while-drilling system polarization channel coding and decoding method based on Gray code structure

A technology of wireless measurement while drilling and encoding and decoding methods, which is applied in the directions of measurement, using linear codes for error correction/detection, and using block codes for error correction/detection, etc. It can solve the problem that ground instrument receivers are difficult to correctly restore downhole information.

Active Publication Date: 2019-11-01
CHINA UNIV OF GEOSCIENCES (WUHAN)
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to adopt a wireless measurement-while-drilling system based on the Gray code structure in view of the technical defects that there are strong noise interference signals in the communication channel of the current wireless measurement-while-drilling system, and the ground instrument receiver is difficult to correctly restore downhole information. Polar channel coding method to solve the above problems

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
  • Wireless measurement-while-drilling system polarization channel coding and decoding method based on Gray code structure
  • Wireless measurement-while-drilling system polarization channel coding and decoding method based on Gray code structure
  • Wireless measurement-while-drilling system polarization channel coding and decoding method based on Gray code structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] Such as figure 1 Shown is a schematic diagram of a polarized channel coding method for a wireless measurement-while-drilling system based on a Gray code structure in the present invention. The method constructs a polarized channel coding method according to the Gray code structure; then according to this polarized channel coding method Design a continuous elimination list (SCL) decoding algorithm; finally, apply the polarization channel coding method constructed by the Gray code structure to the coding module of the downhole instrument of the wireless measurement while drilling system, and apply this special SCL algorithm to the wireless The decoding module of the ground instrument of the measurement-while-drilli...

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 wireless measurement-while-drilling system polarization channel coding method based on a Gray code structure, and the method comprises the steps: constructing a polarizationchannel coding method according to the structure of a Gray code, and the coding method being used in a channel coding module of an underground instrument of a wireless measurement while drilling system; designing a continuous cancellation list (SCL) decoding algorithm according to a channel coding method of an underground instrument, and then applying the algorithm to a decoding module of a groundinstrument of a wireless measurement while drilling system to recover underground sent data. The method has the advantages that the constructed polarization channel coding method has a Gray code structure and has better error code performance than a common polarization code, so that the potential of the polarization code is further excited, the bit error rate of the wireless measurement-while-drilling system is effectively reduced, and the reliability of the system is improved.

Description

technical field [0001] The invention relates to the technical field of measurement-while-drilling of oil, natural gas, coal mines, etc., in particular to a polarization channel coding method of a wireless measurement-while-drilling system based on a Gray code structure. Background technique [0002] The data transmission methods of the wireless measurement-while-drilling system include mud pulse, electromagnetic wave and sound wave. The wireless measurement-while-drilling system is divided into two parts: downhole instruments and surface instruments. The downhole instruments mainly include sensor modules, channel coding, modulation modules and power amplifiers; the surface instruments mainly include signal conditioning modules, signal processing modules, demodulation modules and decoding modules. module. The system mainly transmits downhole engineering parameters and geological parameters. The amount of data sent downhole is small, and the code length of the sent data is us...

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): H03M13/15E21B47/12
CPCE21B47/12H03M13/1505
Inventor 王家豪蒋哲栋卢春华陈振兴倪效勇张祥莉
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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