Modeling of Readback Pulse of Perpendicular Recording Channel

概要

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The performances of three transition response models used in perpendicular magnetic recording channel were compared and analyzed. Based on the study results, three modified transition response models with an exponential term 'k' added to the conventional models were proposed that match better with the actual response. An analytically derived response was used as the reference for comparison with the waveform obtained from the model. The optimum value of the index 'k' is implemented to minimize the fitting error. Simulation results indicate that the modified models with addition of index 'k' which gave smaller fitting error were superior to the popular models. The performances of modified hyperbolic tangent and modified error function models are better than that of modified arctangent model. Also, the modified hyperbolic arctangent model seems easier to implement for simulation and evaluation of channel performance because of its simplicity. The effects of GMR head and double layered media with different geometric and magnetic parameters on the readback pulse shape were also investigated. The study results indicate that a model with optimal 'k' could be used to evaluate the system performance for a particular head-media combination.
社団法人電子情報通信学会の論文
2002-10-31