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A fully-unrolled LDPC decoder based on quantized message passing

Type of publication Peer-reviewed
Publikationsform Proceedings (peer-reviewed)
Author Balatsoukas-Stimming Alexios, Meidlinger Michael, Ghanaatian Reza, Matz Gerald, Burg Andreas,
Project Design of Energy Efficient and Wireless Communication Systems under Unreliable Silicon
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Proceedings (peer-reviewed)

Title of proceedings 2015 IEEE Workshop on Signal Processing Systems (SiPS)
Place Hangzhou, China
DOI 10.1109/sips.2015.7345024


In this paper, we propose a finite alphabet message passing algorithm for LDPC codes that replaces the standard min-sum variable node update rule by a mapping based on generic look-up tables. This mapping is designed in a way that maximizes the mutual information between the decoder messages and the codeword bits. We show that our decoder can deliver the same error rate performance as the conventional decoder with a much smaller message bit-width. Finally, we use the proposed algorithm to design a fully unrolled LDPC decoder hardware architecture.