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A set-based non-equally protected decoding method and system

An unequal and collective technology, applied in the field of protection decoding methods and systems, can solve problems such as decoding performance degradation and decoding complexity reduction, and achieve the effect of reducing computational complexity and improving decoding efficiency

Active Publication Date: 2020-08-04
BEIHANG UNIV
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Problems solved by technology

q is required in the update operation of each check node 2 Order of magnitude computational complexity
The EMS-based decoding algorithm truncates the confidence vector with a length of q to nm (nm2 The computational complexity of the order of magnitude, but the decoding performance decreases significantly with the decrease of nm, which limits the further reduction of the decoding complexity

Method used

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  • A set-based non-equally protected decoding method and system
  • A set-based non-equally protected decoding method and system
  • A set-based non-equally protected decoding method and system

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] figure 1 It is a schematic diagram of a bipartite graph of an LDPC code parity check matrix with 5 rows and 10 columns in the prior art, figure 1 It can also be called a Tanner graph, and the nodes in the Tanner graph are divided into two types: variable nodes VN and check nodes CN. Each variable node VN corresponds to a column in the decoding matrix, represent...

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Abstract

The invention provides a set based unequal protection decoding method and system. The method comprises that symbol information vectors are divided into different types according to element confidencetherein; and the different types of symbol information vectors are divided into different sets, and decoding is carried out in the unit of set. The method and system can be mainly used to reduce the computing complexity of variable nodes. The sets are divided reasonably and proper unequal protection thresholds are used, so that the decoding efficiency can be improved on the premise that the decoding performance is ensured.

Description

technical field [0001] The embodiment of the present invention relates to the field of communication technologies, and in particular to a set-based unequal protection decoding method and system. Background technique [0002] Error control coding, also known as channel coding, can ensure the reliability of data transmission in communication systems. Low-density parity-check codes (LDPC codes) are a class of linear error-correcting codes whose performance is close to the Shannon limit, and are widely used in transmission systems that require high data reliability. In the past ten years, binary LDPC codes have attracted considerable attention and developed rapidly because of their excellent performance. Multi-ary LDPC codes can achieve greater performance gains than binary LDPC codes, but at the cost of extremely high computational complexity and storage memory, which hinders the practical application and development of multi-ary LDPC codes. [0003] The bipartite graph of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M13/11
CPCH03M13/1105H03M13/1148H04L1/005H04L1/007
Inventor 王祖林李威宿晨庚宋李园黄勤
Owner BEIHANG UNIV
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