Modified robust soliton distribution (MRSD) with improved ripple size for LT codes

Kuo Kuang Yen, Yen Chin Liao, Chih-Lung Chen, Hsie-Chia Chang

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


In this letter, we propose a scheme to modify robust Soliton distribution (RSD) with respect to the expected ripple size. We only adjust the proportion of degree 1, degree 2 and the maximum degree to derive the modified RSD (MRSD). Thus the proposed scheme contains only two variables and its complexity does not increase with the code length. Our objective is to increase the mean of the expected ripple size while decreasing its variance at the same time. Furthermore, sequential quadratic programming is introduced to maximize the objective function under certain constraints. Simulation results show that, with different code lengths, MRSD saves 2% to 5.8% overhead to decode entire input symbols, compared to RSD.

Original languageEnglish
Article number6497215
Pages (from-to)976-979
Number of pages4
JournalIEEE Communications Letters
Issue number5
StatePublished - May 2013


  • LT code
  • degree
  • ripple


Dive into the research topics of 'Modified robust soliton distribution (MRSD) with improved ripple size for LT codes'. Together they form a unique fingerprint.

Cite this