Open AccessJoint optimisation technique for multi‐edge type low‐density parity‐check codes
Author(s) -
Jayasooriya Sachini,
Shirvanimoghaddam Mahyar,
Ong Lawrence,
Johnson Sarah J.
Publication year - 2017
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0287
Subject(s) - low density parity check code , enhanced data rates for gsm evolution , algorithm , decoding methods , computer science , joint (building) , node (physics) , a priori and a posteriori , mathematics , telecommunications , architectural engineering , philosophy , structural engineering , epistemology , engineering
This study considers the optimisation of multi‐edge type low‐density parity‐check (MET‐LDPC) codes to maximise the decoding threshold. The authors propose an algorithm to jointly optimise the node degree distribution and the multi‐edge structure of MET‐LDPC codes for given values of the maximum number of edge‐types and maximum node degrees. This joint optimisation is particularly important for MET‐LDPC codes as it is not clear a priori which structures will be good. Using several examples, they demonstrate that the MET‐LDPC codes designed by the proposed joint optimisation algorithm exhibit improved decoding thresholds compared with previously reported MET‐LDPC codes.