A method for suppressing error propagation in (1,7) MDFE detectors

MDFE (Multilevel Decision Feedback Equalization) [1,2] type detectors have been proposed for high recording densities and high data rates in magnetic recording. However, error propagation is a serious problem in all DFE appro aches. In this paper, we present some solutions to the error propagation pr oblem using existing signals with less complexity in MDFE and M3DFE [3] det ectors. We discuss the effectiveness of these suppression techniques with r espect to simulation results and experimental results in the MDFE read chan nel. The results show that the methods can considerably suppress error prop agation.