Noise characteristics of double-layered perpendicular media

Time-domain analysis of a reproduced waveform shows that the media noise of double-layered perpendicular media consists of transition noise localized around the transitions and DC-erased area noise independent of transition. We used this analysis to develop a waveform model, incorporating media nois e, to estimate the bit error rate performance of double-layered perpendicul ar media. Moreover, we proposed a simple mathematical method for estimating the media noise power using the head/media magnetic parameters and R/W con ditions. (C) 2001 Elsevier Science B.V. All rights reserved.