Self-adjustable offset min-sum algorithm for ISDB-S2 LDPC decoder

Wen Ji*, Makoto Hamaminato, Hiroshi Nakayama, Satoshi Goto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In this paper, a novel self-adjustable offset min-sum LDPC decoding algorithm is proposed for ISDB-S2 application. We present for the first time a uniform approximation of the check node operation through mathematical induction on Jacobian logarithm and theoretically shows that the offset value is mainly dependent on the difference of the two most unreliable inputs from the bit nodes, which makes the offset value adjustable during the iterative decoding procedure. Simulation results for all 11 code rates of ISDB-S2 demonstrate that the proposed method can achieve an average of 0.15 dB gain compared to the Min-sum based algorithms, and consumes only 1.21% computation complexity compared to BP-based algorithms in the best case.

Original languageEnglish
Pages (from-to)1283-1289
Number of pages7
JournalIEICE Electronics Express
Issue number17
Publication statusPublished - 2010 Sept 10


  • ISDB-S2
  • LDPC decoding algorithm

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Self-adjustable offset min-sum algorithm for ISDB-S2 LDPC decoder'. Together they form a unique fingerprint.

Cite this