Quaternary Message Passing Decoding of LDPC Codes: Stability Analysis and Error Floor
Paper in proceeding, 2021

We revisit a coarsely quantized message passing decoding algorithm for low-density parity-check (LDPC) code ensembles, named quaternary message passing (QMP). Particularly, we analyze the performance of unstructured LDPC codes under QMP decoding by means of density evolution. The impact of degree-2 and degree-3 variable nodes on the error floor performance is also discussed. We design a code for QMP that performs within 0.55 dB of the 5G LDPC code at a block error rate of 10−4 .


Emna Ben Yacoub

Technical University of Munich

Balázs Matuz

German Aerospace Center (DLR)

Alexandre Graell I Amat

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks, Communication Systems

Gianluigi Liva

German Aerospace Center (DLR)

11th International Symposium on Topics in Coding (ISTC)

978-1-6654-0943-8 (ISBN)

2021 11th International Symposium on Topics in Coding (ISTC)
Montreal, Canada,

Subject Categories

Computer Engineering


Communication Systems

Areas of Advance

Information and Communication Technology





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2/7/2022 9