asymptotic performance. In the EXIT chart, the mutual information
(MI) transfer characteristics of the VN decoder (VND)
and the check node decoder (CND) are plotted to calculate
the threshold graphically [5]. The minimum Eb/N0 value for
which the VND curve just touches the CND curve is considered
as the threshold ( Eb
N0
∗
). The EXIT chart model for the NB
LDPC codes was developed by Bennatan and Burshtein [6]
for an arbitrary discrete-memoryless channel