Time-Invariant Quasi-Cyclic Spatially Coupled LDPC Codes Based on Packings
Mu Zhang, Zulin Wang, Qin Huang, Shafei Wang · IEEE Transactions on Communications · 2016
This paper presents two packings derived from balanced incomplete block designs to construct quasi-cyclic spatially coupled LDPC convolutional codes (SC-LDPC-CCs). The construction gives time-invariant codes, since the sub-blocks corresponding to each time instant of the parity-check matrix are identical. Moreover, it provides flexible design rates and constraint lengths. Simulation results show that the proposed packing-based SC-LDPC-CCs outperform the existing time-invariant codes and perform closely to the time-varying protograph-based codes.