Journal ArticleDOI
Applications of a new simulation model for media noise limited magnetic recording channels
J. Caroselli,Jack K. Wolf +1 more
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TLDR
A new model for the signal dependent transition noise and partial erasure which occur in the readback signal from thin film recording media is reviewed, which has its basis in physics and can be entirely specified by three parameters of the media.Abstract:
A new model for the signal dependent transition noise and partial erasure which occur in the readback signal from thin film recording media is reviewed. This model, which is referred to as the microtrack model, has its basis in physics and can be entirely specified by three parameters of the media. It is used both as a simulation tool and for analytical calculation. Through simulation, the effect of various amounts of media noise on a PR4 channel is shown. Analytically, the amount of jitter and widening effects of the noise produced by the model are examined. Also, the autocorrelation of this noise and the effect of partial erasure on it is examined.read more
Citations
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Journal ArticleDOI
The feasibility of magnetic recording at 1 Terabit per square inch
TL;DR: In this paper, the feasibility of implementing conventional magnetic recording technology at densities up to one Terabit per square inch was explored and the readback signals were processed by equalization to a simple binary eye followed by soft detection of a low-rate simple parity check code.
Journal ArticleDOI
Codes for digital recorders
TL;DR: This paper surveys the theory and practice of constrained coding, tracing the evolution of the subject from its origins in Shannon's classic 1948 paper to present-day applications in high-density digital recorders.
Journal ArticleDOI
Signal to noise ratio scaling and density limit estimates in longitudinal magnetic recording
TL;DR: In this article, a simplified general expression for SNR for digital magnetic recording for transition noise dominant systems is given, in which the transition parameter scales with the in-plane grain diameter, and it is shown that the scaling law is quite general and useful for error rate analysis.
Journal ArticleDOI
Turbo decoding for partial response channels
TL;DR: A simplified system is presented that uses as its outer code a single convolutional code and as its inner code the partial response channel, and is shown to perform as well as the more complicated system, offering substantial gains over uncoded systems.
Journal ArticleDOI
Transition jitter estimates in tilted and conventional perpendicular recording media at 1 Tb/in/sup 2/
Kai-Zhong Gao,H.N. Bertram +1 more
TL;DR: In this article, the effect of intergranular exchange and anisotropy distributions on signal-to-noise ratio (S2R) was examined for Tb/in/sup 2/ densities.
References
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Journal ArticleDOI
Transition noise analysis of thin film magnetic recording media
Boris Slutsky,H.N. Bertram +1 more
TL;DR: In this article, a simple but accurate expression for general non-stationary noise correlation in the presence of a recorded transition is analyzed in terms of both noise voltage and spectral measurements, which applies for low-density recording with both inductive and magnetoresistive heads as well as all magnetization orientations.
Journal ArticleDOI
A simple statistical model of partial erasure in thin film disk recording systems
TL;DR: In this paper, a simple statistical model of the partial erasure effect in metallic thin-film recording is given, and experimental data are shown and used to determine a fundamental parameter of the micromagnetic structure of the medium.
Journal ArticleDOI
Transition noise model for longitudinal thin-film media
A. Barany,H.N. Bertram +1 more
TL;DR: In this article, a model for the noise process in longitudinal thin-film media, assuming that each transition's position fluctuation is correlated to the previous transition's positions fluctuation by the demagnetization field, is presented.
Proceedings ArticleDOI
New model for media noise in thin-film magnetic recording media
J. Caroselli,Jack K. Wolf +1 more
TL;DR: In this paper, a new model, called the MicroTrack Model, was developed for signal dependent transition noise and partial erasure that occurs in the readback signal from thin film magnetic disks.