Decoding of NB-LDPC codes over Subfields
preprintposted on 10.07.2020, 04:20 by V B Wijekoon, Emanuele Viterbo, Yi Hong
In this paper, we present a novel method to expand a graph over a finite field into a larger one over one of
the original field’s subfields. This allows a number of different graph expansions for any given graph.
These expansions can be used in various applications, and we focus specifically on the case of decoding
NB-LDPC codes. Using the novel expanded graphs, it is possible to reduce decoding complexity of NB-
LDPC codes significantly with minimal performance losses.