Title :
The effect of MR head nonlinearity on MDFE and PRML performance
Author :
Liu, Bin ; Lee, Yuan Xing ; Mutoh, Hiroshi ; Garg, Hari Krishina
Author_Institution :
Data Storage Inst., Singapore
fDate :
9/1/1997 12:00:00 AM
Abstract :
The detection performance of multi-level decision feedback equalization (MDFE) and partial response with maximum likelihood detection (PRML) in the presence of magnetoresistive (MR) head nonlinearity is investigated through simulation. Two models are used to characterize the MR head nonlinearity: (1) a transfer function curve based on measurement and (2) a 3rd-order polynomial model. The results indicate that MDFE is more robust to MR head nonlinearity than PRML, especially to head saturation
Keywords :
decision feedback equalisers; magnetic heads; magnetoresistive devices; maximum likelihood detection; partial response channels; polynomials; transfer functions; MDFE; MR head nonlinearity; PRML; magnetoresistive head; multi-level decision feedback equalization; partial response with maximum likelihood detection; polynomial; saturation; transfer function; Bit error rate; Curve fitting; Cutoff frequency; Decision feedback equalizers; Detectors; Equalizers; Finite impulse response filter; Magnetic heads; Magnetoresistance; Maximum likelihood detection; Mean square error methods; Polynomials; Robustness; Signal to noise ratio; Transfer functions;
Journal_Title :
Magnetics, IEEE Transactions on
