Polar code coding and decoding method for m-ary orthogonal spread spectrum signal

An orthogonal spread spectrum, coding and decoding technology, which is applied in the direction of adjusting channel coding, transmission modification based on link quality, data representation error detection/correction, etc., can solve the problem of unsatisfactory system bit error rate performance, increase communication system cost, Large amount of calculation and other problems, to meet the requirements of channel coding and decoding efficiency and reliability, overcome the sharp decline in decoding performance, and the effect of large data throughput

Active Publication Date: 2018-09-04
XIDIAN UNIV
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this method are: first, the number of iterations is large and the time delay is large, which leads to a decrease in the throughput of the system and cannot meet the requirements of a higher information transmission rate; second, due to the multi-ary low-density parity The message update process of code verification is complex and the amount of calculation is large, which leads to complex implementation of the whole system, higher requirements on the processing capacity of the chip, and increases the cost of the communic...

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
  • Polar code coding and decoding method for m-ary orthogonal spread spectrum signal
  • Polar code coding and decoding method for m-ary orthogonal spread spectrum signal
  • Polar code coding and decoding method for m-ary orthogonal spread spectrum signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] Refer to attached figure 1 , to further describe the implementation method of the present invention.

[0042] Step 1, the sending end of the encoding and decoding system reads in the information sequence to be sent.

[0043] Step 2: Perform polar code encoding on the information sequence.

[0044] The sending end of the encoding and decoding system adopts an equal division method to divide the read-in information sequence into multiple sub-information sequences of equal length and non-overlapping each other.

[0045] The concrete steps of described equal division method are as follows:

[0046] Step 1, divide the read-in information sequence into multiple non-overlapping sub-information sequences;

[0047] Step 2, add I zeros at the end of the remaining sub-information sequence after the equalization, so that its length is equal to the length of the sub-info...

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 polar code coding and decoding method for m-ary orthogonal spread spectrum signal, mainly solving the problem of poor bit error rate performance of m-ary orthogonal spread spectrum hard decision decoding in prior art and comprising the specific steps of: (1) reading an information sequence to be sent; (2) performing polar code coding on the information sequence; (3) performing interleaving processing on the polar code coding sequence; (4) performing m-ary orthogonal spread spectrum; (5) extracting a log-likelihood ratio sequence; (6) de-interleaving the log-likelihoodratio sequence; and (7) decoding the polar code. According to the soft-decision method of extracting the log-likelihood ratio sequence, the invention combines high-efficiency polar code coding and decoding with m-ary orthogonal spread spectrum, and has the advantages such as good error code performance, low complexity and high spectral efficiency, which meets the requirements of the channel coding and decoding technology for efficiency and reliability.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for encoding and decoding by combining multi-ary system orthogonal spread spectrum modulation and polar code in the technical field of satellite communication. The invention can be used in a satellite emergency communication system to realize high-efficiency channel error correction coding and decoding, and improve system reliability and frequency band efficiency. Background technique [0002] Polar code is a kind of channel coding proposed in 2007, and it is also the only channel coding that can theoretically prove that the channel capacity can be achieved when the code length is infinitely long. [0003] Xi'an University of Electronic Science and Technology applied for a patent document "Multiple Orthogonal Signal Low Density Check Code Coding and Decoding Method" (application date: March 4, 2014, application number: 201410075153.2, application publication ...

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): H04L1/00H03M13/13
CPCH03M13/13H04L1/0009H04L1/0041H04L1/0057
Inventor 田斌孙林海袁芳
Owner XIDIAN 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