Open AccessImproved CRC aided BP decoding for polar codes
Author(s) -
Hong Sungkwon,
Chung JongMoon
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12175
Subject(s) - belief propagation , decoding methods , cyclic redundancy check , algorithm , block code , coding gain , computer science , coding (social sciences) , redundancy (engineering) , factor graph , bit error rate , propagation of uncertainty , polar , mathematics , statistics , physics , astronomy , operating system
In this letter, a modified message passing algorithm to prevent short cycles in the factor graph is proposed and combined with a relaxation technique to improve the performance of cyclic redundancy check aided belief propagation decoding for polar codes. Numerical results show that the proposed scheme can achieve a 0.7 dB coding gain, for the code rate of 0.5 at the block error rate of 10 −5 with a comparable average number of iterations over the pure belief propagation decoding scheme when the code block length is 1024.