Static Layered Schedules and Core-Only Parity Check for the 5G New Radio LDPC Codes

Konferenz: SCC 2019 - 12th International ITG Conference on Systems, Communications and Coding
11.02.2019 - 14.02.2019 in Rostock, Germany


Tagungsband: SCC 2019

Seiten: 5Sprache: EnglischTyp: PDF

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Frenzel, Janik; Mueller-Weinfurtner, Stefan (Intel Deutschland GmbH, Nuremberg, Germany)
Huber, Johannes B.; Mueller, Ralf R. (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Germany)

We analyze static update schedules for high-speed decoding of the Low-Density Parity-Check (LDPC) codes used in 5G New Radio (NR). Motivated by the fact that updates of Check Nodes (CNs) with smaller degrees result in larger mutual-information (MI) gains, we propose a schedule based on the ascending order of CN degrees. Furthermore, we examine the individual bit-error rates throughout the codeword and present a Core-Only Parity Check (COPC) strategy to accelerate the decoder convergence. These two simple concepts reduce the number of iterations until convergence by up to 15% compared to a Top-to-Bottom (TtB) schedule with the full parity check.