Serial/parallel (S/P) turbo codes for low error rates

This article describes a new concatenation scheme for turbo codes, a hybrid model between serial and parallel turbo codes, which offers improved asymptotic performance. We review the classical regular interleaving problems and we show how this new hybrid model allows us to keep a simple regular interleaving while outperforming more complex permutations at low error rates. Simulation results are presented and compared with well established turbo codes.