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Iterative data processing method in layered decoding of LDPC codes and decoder system

An LDPC code and data processing technology, applied in the field of decoder systems, can solve problems such as high complexity and difficulty in implementing decoders

Pending Publication Date: 2021-01-19
湖南国科锐承电子科技有限公司
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  • Application Information

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Problems solved by technology

[0003] At present, LDPC code decoding mainly includes serial decoding, parallel decoding and partial parallel decoding algorithms, based on PLDA (Parallel layered Decoding Algorithm, layered decoding) algorithm, PLDA algorithm due to its resource and speed Taking into account the general algorithm in the actual system, however, when decoding, the complexity of implementing message iterative calculation and permutation network design is relatively large, which affects the difficulty of implementing the decoder

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  • Iterative data processing method in layered decoding of LDPC codes and decoder system
  • Iterative data processing method in layered decoding of LDPC codes and decoder system
  • Iterative data processing method in layered decoding of LDPC codes and decoder system

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[0067] Please refer to the attached figure 1 to attach figure 2 As shown, a regular QC-LDPC code with a code length of 4480, a code rate of 7 / 8, a row weight of 24, and a column weight of 3 is used as a code pattern for a high-speed LDPC decoder, and its cyclic permutation matrix is ​​a 7×7 sub Matrix, most of the code patterns used in the current standard are this type of code patterns, and the methods introduced in the present invention can be used. Its check matrix H qc Divided into 80 row blocks (RB) and 640 column blocks (CB), each RB (CB) contains 7 rows (7 columns) of the parity check matrix. Each RB contains 24 7×7 cyclic permutation matrices, and the rest are all 0 matrices; each CB contains 3 7×7 cyclic permutation matrices, and the rest are all 0 matrices. According to the row permutation hierarchical strategy proposed in Chapter 3, for the parity check matrix H qc Hierarchical processing: the first row of 80 RBs is taken out and combined into the first layer, ...

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Abstract

The invention discloses an iterative data processing method and a decoder system in layered decoding of LDPC codes, and the method mainly comprises the following steps: initializing check node information and posterior probability information of the LDPC codes, carrying out information iterative processing, and finally, and stopping iteration. The decoder system comprises a control module, a checkvariable node message joint processing module, a check node message storage module, a posterior probability message register module, a data replacement network module, a channel message input cache module and a decoding codeword output cache module.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an iterative data processing method and a decoder system in layered decoding of LDPC codes. Background technique [0002] With the rapid development of high-speed data transmission services and the commercialization of 5G standards, people have higher and higher requirements for the quality and speed of information transmission. High-speed LDPC (Low-density Parity-check, low-density parity check) code decoders are used The application requirements in the communication system are more intense. In the inherent channel environment, how to meet the increasingly high data transmission rate requirements and ensure the reliability of information transmission is the main task and goal of channel coding technology research. [0003] At present, the decoding of LDPC codes mainly includes serial decoding, parallel decoding and partial parallel decoding algorithms, based on t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11
CPCH03M13/11Y02D30/70
Inventor 李二保朱江姜南杨虎高凯杨军朱立王新建
Owner 湖南国科锐承电子科技有限公司