A Cycle-based Puncturing Algorithm for Rate-compatible Non-binary LDPC Codes
XIE Li
ZHOU Hua
SHI Shuangying
Abstract：LDPC(Low-Density-Parity-Check)codes are an efficient channel coding technique for wireless communication systems and are used in systems such as fifth generation mobile communications.The key to rate compatibility is to achieve arbitrary changes from low to high rates without increasing the complexity of decoding.A bitwise puncturing algorithm for rate compatible non-binary LDPC codes is proposed.The algorithm firstly converts the non-binary symbol matrix into a binary bit matrix,and sec-ondly uses a minimum cycle detection algorithm to evaluate the cycle size for each bit variable node involved in,and punctures bit variable nodes in large cycles.Simulation results show that the proposed algorithm achieves a gain of approximately 0.1 dB～0.25 dB for both non-regular LDPC codes of block length 256 and rate 0.5 and regular LDPC codes of code length 155 and code rate 0.4 over GF(4).
Keywords：non-binary LDPC codesrate compatiblepuncturingcyclebitwise
Publication Date：2025-01-19
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 31-35 )