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Physical layer network coding method based on two-edge type low density parity check codes

A low-density parity and network coding technology, which is applied in the field of physical layer network coding based on two-sided low-density parity-check codes. The effect of code complexity reduction

Active Publication Date: 2018-10-26
FUQING BRANCH OF FUJIAN NORMAL UNIV
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Problems solved by technology

However, the physical layer network coding has not yet been designed in combination with multilateral low-density parity-check codes (ie, MET-LDPC codes).

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  • Physical layer network coding method based on two-edge type low density parity check codes
  • Physical layer network coding method based on two-edge type low density parity check codes
  • Physical layer network coding method based on two-edge type low density parity check codes

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Embodiment Construction

[0069] The present invention will be further described below in combination with implementation modes and examples.

[0070] This embodiment provides a physical layer network coding method based on two-sided low-density parity-check codes, including the following steps:

[0071] Step S1: According to the characteristics of the network layer coding model, combine the TET-LPDC code and the PNC code to encode the TET-LPDC-PNC code;

[0072] Step S2: Decoding the TET-LDPC-PNC code in combination with the degree distribution of the TET-LDPC code.

[0073] In this embodiment, the TET-LDPC code is different from the traditional LDPC code in that the degree distribution representation method of the TET-LDPC code is described from the perspective of "nodes", which can be expressed by two polynomials, namely:

[0074]

[0075] μ(x):=x (1,2) (Formula 2)

[0076] The first polynomial corresponds to the variable node, and the second polynomial corresponds to the check node. Specifi...

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Abstract

The invention relates to a physical layer network coding method based on two-edge type low density parity check codes. The method comprises the following steps of S1, combining the TET-LPDC codes (Two-Edge Type Low Density Parity Check Codes) and PNC (Physical-layer Network Coding) codes according to a feature of a network layer coding model, and obtaining TET-LPDC-PNC codes through coding; S2, through combination of degree distribution of the TET-LPDC codes, decoding the TET-LPDC-PNC codes. According to the method, joint design is carried out on the two-edge type low density parity check codes and the physical-layer network coding codes; joint coding and decoding design is carried out on the TET-LPDC codes from an angle of a node according to a two-edge structure feature of the TET-LPDC codes; and for decoding, a serial likelihood information decoding mode is employed. According to the method, the coding and decoding complexity is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of physical layer network coding and channel coding and decoding of communications, in particular to a physical layer network coding method based on two-sided low-density parity-check codes. Background technique [0002] In 1948, Shannon proposed the channel coding theory in his paper "A mathematical theory of communication". Since then, the channel coding theory has been created and has become the subject of unremitting research by scientists. In 2000, Ahlswede R and Cai Ning of the Chinese University of Hong Kong proposed the concept of network coding in the paper "Network information flow", which attracted widespread attention. Due to the characteristic that network coding can increase network throughput, more and more people start to study network coding and obtain many new achievements. [0003] For a long time, channel coding and network coding were designed and researched separately. In 2006, techni...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H03M13/27H03M13/11
CPCH03M13/1125H03M13/2703H04L1/0043H04L1/0052H04L1/0057H04L1/0076
Inventor 游莹陈平平林捷
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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