A New Quasi-Random LDPC Convolutional Codes and Window Decoding

PENG Wan-quan; WU Xiao-bing; ZHANG Cheng-chang; FENG Wen-jiang

doi:10.3969/j.issn.0372-2112.2014.07.021

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A New Quasi-Random LDPC Convolutional Codes and Window Decoding

更新时间：2025-07-16

- A New Quasi-Random LDPC Convolutional Codes and Window Decoding
- Acta Electronica Sinica Vol. 42, Issue 7, Pages: 1379-1386(2014)
- 作者机构：
  
  1. 重庆工程职业技术学院电气工程学院,重庆,400037
  2. 重庆大学通信工程学院,重庆,400044
  3. 重庆工程职业技术学院电气工程学院,重庆,400037
  4. 重庆大学通信工程学院,重庆,400044
- 作者简介：
- 基金信息：
  
  Chongqing Research Program of Basic and Frontier Technology (No.cstc2013jcyjA40055);Science and Technology Research Program of Chongqing Municipal Education Commission (No.KJ122003);Fundamental Research Funds for the Central Universities (No.CDJZR12160019)
- DOI：10.3969/j.issn.0372-2112.2014.07.021
  CLC： TN911.22
- Published：2014
- 稿件说明：
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PENG Wan-quan, WU Xiao-bing, ZHANG Cheng-chang, et al. A New Quasi-Random LDPC Convolutional Codes and Window Decoding[J]. Acta Electronica Sinica, 2014, 42(7): 1379-1386.
DOI：

PENG Wan-quan, WU Xiao-bing, ZHANG Cheng-chang, et al. A New Quasi-Random LDPC Convolutional Codes and Window Decoding[J]. Acta Electronica Sinica, 2014, 42(7): 1379-1386. DOI： 10.3969/j.issn.0372-2112.2014.07.021.

摘要

以Gallager随机LDPC分组码为基础，通过列置换、置数、剪切与合并，构造了一种新的（

，3，6）准随机LDPC卷积码.针对该码类，提出了一种窗扇尺寸固定、滑动步长可选的窗译码算法，大幅降低了寄存器开销和译码延时.仿真实验界定了滑动步长的取值范围，验证了构造方案和窗译码的有效性，测试了不同约束度的准随机LDPC卷积码的误码性能，结果显示约束度

仅为1535即可获得距离香农限约1dB的纠错能力.

Abstract

Using column permutation

number setting

cutting and merging

a new(l

6)quasi-random LDPC convolutional codes is derived from Gallager LDPC block code.Aiming at this codes

the paper advances a windowed decoding

which the size of window sash is invariable and sliding step is optional

and it can considerably reduce the size of the register and decoding delay.The simulation defines the value range of sliding step and confirms the effectiveness of the construction method and windowed decoding

and also tests the BER performance of quasi-random LDPC convolutional codes with different constraint degrees.The results show that

=1535 can obtain an error-correcting ability about 1 dB from the capacity limit.

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