sages later. By using the proposed sorting and path construction
for check node processing, no intermediate results need to be
stored except the sorted v-to-c messages, which can fit into a
RAM E. A RAM E is usually much smaller than a RAM A for
QCNB-LDPC codes. The three copies of RAMA for storing the
c-to-v messages in the decoder architecture of [13] have been
reduced to five copies of RAM E storing the sorted v-to-c messages
in the proposed decoder. The sorted v-to-c messages can
be considered as compressed c-to-v messages