  Irregular low-density parity check (LDPC) codes are particularly well-suited
for transmission schemes that require unequal error protection (UEP) of the
transmitted data due to the different connection degrees of its variable nodes.
However, this UEP capability is strongly dependent on the connection profile
among the protection classes. This paper applies a multi-edge type analysis of
LDPC codes for optimizing such connection profile according to the performance
requirements of each protection class. This allows the construction of UEP-LDPC
codes where the difference between the performance of the protection classes
can be adjusted and with an UEP capability that does not vanish as the number
of decoding iterations grows.
