Thorsten Hehn Johannes B. Huber Olgica Milenkovic Stefan Laendner Multiple-Bases Belief-Propagation Decoding of High-Density Cyclic Codes http://arxiv.org/abs/0905.0079 2009 CoRR abs/0905.0079 db/journals/corr/corr0905.html#abs-0905-0079 informal publication