Two-dimensional equalization: theory and applications to high density magnetic recording

Two dimensional, separable signal models are proposed for modeling the effects of intersymbol and inter-track interference in high-density magnetic storage media. The optimum (minimum mean-squared error) linear and decision feedback equalizers based on these models are developed. The use of a two dimensional LMS algorithm for adaptive updating of the equalizer coefficients is discussed and analytical results presented. Finally, simulation evidence is provided to predict the performance improvements achievable based on these models vis-a-vis one dimensional equalization