A New Design Method for Quasi-cyclic LDPC Codes with Fast Encoding Ability
Meiling Zhang · Telecommunication Engineering · 2013
A new design of quasi-cyclic(QC) LDPC codes with easier hardware implementation is proposed to lower the encoding complexity.Based on the QC-LDPC codes with circulant permutation matrices,the masking method and line permutations are utilized to make the parity-check matrix have the quasi-dual-diagonal structure,and the fast encoding algorithm directly from the parity-check matrix can reduce the encoding complexity effectively.Simulation results show that compared with the QC-LDPC codes from the IEEE 802.16e standard,the constructed codes have better performance while maintaining the low encoding complexity.