Decoding Times of Irregular Gallager Codes

David J C MacKay

This paper is an appendix to {\em `Comparison of Constructions of Irregular Gallager Codes'\/} by David J. C. MacKay, Simon T. Wilson and Matthew C. Davey, which was published in the proceedings of the 1998 Allerton Conference on Communication, Control, and Computing and submitted to IEEE Transactions on Communications 30 July 1998. That paper compares alternative methods for constructing irregular Gallager codes. This paper reports the decoding times of the codes studied in that paper. The decoding time differs very little between irregular codes and regular codes. I prepared this draft for Dan Spielman. Dan, should I write this up for publication somewhere? Perhaps in the {\em IEEE Transactions on Sparse Graph Codes}? Oh, that doesn't exist yet does it.

postscript (Cambridge UK).

postscript (Canada mirror).


David MacKay's: home page, publications. bibtex file.
Canadian mirrors: home page, publications. bibtex file.