Average transition density constraints for mitigating transition noise in magnetic recording

Average transition density (ATD) constraints for mitigating transition noise in magnetic recording, were investigated. The imposing of ATD constraint is based on assigning a particular cost function to a finite-state transition diagram (FSTD). At a normalized linear user density of 0.3, the performance of an unconstrained system satisfying an ATD constraint was simulated. It was done using a microtrack longitudinal recording model corrupted by 90% transition noise and 10% electronics noise.