We. Ryan et Nh. Yeh, VITERBI DETECTOR FOR PR4-EQUALIZED MAGNETIC RECORDING CHANNELS WITH TRANSITION-SHIFT AND PARTIAL-ERASURE NONLINEARITIES, IEEE transactions on magnetics, 32(5), 1996, pp. 3950-3952
A discrete-time nonlinear model for a PR4-equalized magnetic recording
channel is derived, extending the results of others. The model makes
clear the difficulty in compensating for nonlinear distortion by conve
ntional techniques, while simultaneously lending itself to reasonably
simple Viterbi detection.