Error code tolerance recognition method for LDPC (low density parity check) code length and code rate

A technology of LDPC code and code length, which is applied in the fields of satellite communication and communication reconnaissance, deep space communication, and intelligent communication to achieve robust recognition performance, simple implementation, and good bit error performance

Inactive Publication Date: 2013-02-06
DALIAN UNIV OF TECH
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of identification method of error-tolerant LDPC code encoding code length and code rate, to solve the problem of multi-code length and multi-code rate in the application technology fields such as intelligent communication, deep space communication, satellite communication and communication reconnaissance. Recognition of LDPC codes

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The specific implementation manner of the present invention will be described in detail below in conjunction with the technical solutions.

[0016] (1) Determine the code length set L={l of the LDPC code used by the target system according to the prior information 1 , l 2 , l 3 , …, l M} and code rate set R={r 1 , r 2 , r 3 , …, r K}. After the recognition process starts, load L and R into memory.

[0017] (2) Use the generation rules of the LDPC code check matrix of the target system to generate the check matrix library H={h corresponding to each code length and code rate ij | i=1, 2, 3, …, M; j=1, 2, 3, …, K}, where h ij Indicates that the corresponding code length l i , code rate r j check matrix. After the recognition process is started, the check matrix library H is loaded into the memory.

[0018] (3) Intercept a code stream with a length of N from the received code stream, requiring N≥max(l 1 , l 2 , l 3 , …, l M ). This section of code stream ...

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 an error code tolerance recognition method for LDPC (low density parity check) code length and code rate, and belongs to the technical field of intelligent communication, deep space communication, satellite communication and communication detection and the like. The recognition method is characterized by taking various code lengths and code rates of LDPC in a target system as testing code lengths and testing code rates, calculating syndrome of a testing code stream section which has the same length with the corresponding testing code length from the first bit in a received code stream by the aid of calibration matrix corresponding to the testing code lengths and the testing code rates, and normalizing non-zero elements in the syndrome through the testing code lengths. If the normalized value is equal to zero, then the corresponding testing code length and testing code rate are judged to be the code length and the code rate of the LDPC to be recognized; otherwise, the testing code length and the testing code rate corresponding to the minimum normalized value obtained are determined to be the code length and the code rate of the LDPC to be recognized at the end of test. The recognition method utilizes easy implementing algorithms, and is stable in recognition performance, good in error code tolerance, and applicable to recognition of code lengths and code rates of various LDPCs.

Description

technical field [0001] The invention belongs to the technical fields of intelligent communication, deep space communication, satellite communication and communication reconnaissance, etc., and relates to the identification of channel coding parameters, in particular to error-tolerant low density parity check codes (English: Low Density Parity Check, referred to as LDPC) encoding code length and code rate identification method. Background technique [0002] In intelligent communication, deep space communication and satellite communication, due to the influence of factors such as channel and time delay, information may not reach the receiver in real time and accurately. In order to ensure the reliability of communication, the information sender needs to change the channel coding parameters in a timely manner to adapt to the change of the channel transmission environment. Under this communication system, the communication parties cannot achieve synchronous communication about ...

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
Inventor 于明高新华杜宇峰
Owner DALIAN UNIV OF TECH
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