Turbo decoding: Why stopping-criteria do work
Axel Heim, Ulrich Sorger · 2008
The convergence of iterative decoding schemes is considered. The class of dually coupled codes is recalled, being a super class to both turbo and LDPC codes. It is proven that the output L-values of a turbo decoder cannot grow to infinity, while those of an LDPC decoder can. Finally, a new decoder parameter is introduced by which the convergence behavior can be controlled.