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Design method of high-performance LT code degree distribution based on translatable sets

A design method and degree distribution technology, applied in coding, code conversion, coding components, etc., can solve the problem of not being able to provide bit error rate performance, and achieve the effect of simple and practical code degree distribution design and excellent bit error rate performance.

Active Publication Date: 2020-04-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to overcome the deficiencies of the prior art, provide a high-performance LT code degree distribution design method based on translatable sets, and solve the technical problem that the traditional LT code degree distribution cannot provide good bit error rate performance

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  • Design method of high-performance LT code degree distribution based on translatable sets
  • Design method of high-performance LT code degree distribution based on translatable sets
  • Design method of high-performance LT code degree distribution based on translatable sets

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Embodiment Construction

[0034] Implementation of the present invention provides a kind of high-performance LT code degree distribution design method based on translatable set, and those skilled in the art can understand that, unless otherwise defined, all terms (comprising technical term and scientific term) used herein have the same with the present invention The same meaning is commonly understood by those of ordinary skill in the art. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.

[0035] LT (Luby Transform) code is the first digital fountain code with practical significance. The main parameter of this type of code is the output degree distribution, which corresponds to different degrees {1,2,...d max} for different probability values Commonly exp...

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Abstract

The invention discloses a degree distribution design method of an LT code with a limited length in a deletion channel, and belongs to the technical field of digital communication. The invention provides a translatable set model that can be firstly increased and secondly decreased by researching the change of the size of the translatable set in an LT code decoding process, and the degree distribution designed of the LT code with the limited length by using the translatable set model provided by the invention can provide excellent error rate performance.

Description

technical field [0001] The invention discloses a degree distribution design method of an LT code under an erasure channel, and belongs to the technical field of digital communication. Background technique [0002] Because of its simplicity and easy theoretical analysis, the deleted channel is a channel model commonly used in coding theory and information theory. In the deletion channel, when the sending end sends a data packet (bit sequence of 0, 1), the receiving end can either receive the data packet correctly, or receive the information that the data packet is deleted. figure 1 A model of such a channel is given, where p is the deletion probability of deleting the channel. In order to solve the problem of data packet loss in the erasure channel, ARQ (Automatic RepeatreQuest, automatic repeat request) technology is widely used. If the channel condition becomes worse, that is, more data packets are deleted, the frequency of requesting retransmission will be greatly increa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M13/37
CPCH03M13/3761H04L1/0045H04L1/0056
Inventor 许生凯徐大专
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS