Spatially-Coupled MacKay-Neal Codes with No Bit Nodes of Degree Two   Achieve the Capacity of BEC
  Obata et al. proved that spatially-coupled (SC) MacKay-Neal (MN) codes achieve the capacity of BEC. However, the SC-MN codes codes have many variable nodes of degree two and have higher error floors. In this paper, we prove that SC-MN codes with no variable nodes of degree two achieve the capacity of BEC. 
Takuya Okazaki and Kenta Kasai
cs.IT math.IT