The Effect of M ead Nonlinearity on ML Performance
Bin Liu, Yuan Xing Lee, H. Mutoh · 1997
The detection performance of multi-level de- cision feedback equalization (MDFE) and partial response with maximum likelihood detection (PRML) in the pres- ence of magnetoresistive (MR) head nonlinearity is inves- tigated through simulation. Two models are used to char- acterize the MR head nonlinearity: (1) a transfer function curve based on measurement and (2) a 3rd-order polyno- mial model. The results indicate that MDFE is more ro- bust to MR head nonlinearity than PRML, especially to head saturation.