Exploiting the shift property of structured LDPC codes for reduced-complexity sliced message passing based decoder design

The sliced message passing (SMP) scheme breaks the sequential tie of CN update and VN update and presents an efficient way of elevating the hardware utilization ratio and increasing throughput. However, the forward and backward permutation networks complicate the message routing and make the SMP-based decoder not amenable for codes with large CN degrees. By utilizing the shift property in some structured codes, we reduced the permutation network by almost 59% when compared with the state-of-art designs. Overall, this design technique will make SMP-based decoder more cost-efficient and applicable for the future communications and storage systems.