Construction of quasi-cyclic LDPC codes from quadratic congruences

Chun Ming Huang, Jen Fa Huang, Chao Chin Yang

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


In this paper, we proposed a novel method for constructing quasi-cyclic low-density parity-check (QC-LDPC) codes based on circulant permutation matrices via a simple quadratic congruential equation. The main advantage is that QC-LDPC codes with a variety of block lengths and rates can be easily constructed with no cycles of length four or less. Simulation results show that the proposed QC-LDPC codes perform slight better than the random regular LDPC codes for short to moderate block lengths and have almost the same performance as Sridara-Fuja-Tanner codes.

Original languageEnglish
Pages (from-to)313-315
Number of pages3
JournalIEEE Communications Letters
Issue number4
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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