Figure 3

The depicted part of the factor graph (using a Tanner notation) illustrates that a bit node (bit i on the figure) is essentially connected to two sets of check nodes, corresponding with H _c and H _GLNC , respectively. A set of check nodes is denoted as CND for check node decoder. The LLR-value coming from the CND corresponding with H _c is denoted as L _c . The LLR-value corresponding with the channel observation is denoted as L_obs,i.