Layer decoding of LDPC codes for DVB-S2

摘要

In the most common form of message-passing decoding, the LDPC decoder are performed by so-called two-phase message-passing algorithm(TPMP). For TPMP, the messages are updated iteratively at two different phases, first check node and then variable node.In this paper, the layer decoding algorithm is applied for DVB-S2 to reduce the iteration number compared to TPMP. This paper shows in detail how to exploit the partly parallel layer schedule for DVB-S2. Simulation results show that the layer decoding performs well based on the proposed layer schedule, which sustains the partly parallel structure and fasts the convergence speed almost 2 times than TPMP.