A study on practical NLTS indicators for MDFE and M2DFE magnetic recording channels

Author

Ye, Weichun ; Liu, Bin ; Lee, Yuan Xing

Author_Institution

Data Storage Inst., Singapore

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3946

Lastpage

3948

Abstract

A new method to determine the write precompensation value based on the sample data obtained from multilevel decision feedback equalization (MDFE) and its extension M2DFE channels is studied. Three parameters are proposed as NLTS indicators. These indicators are very sensitive to NLTS but not to other non-linear distortions including the amplitude asymmetry of MR head and the shift of sampling clock. Neither complex computation nor additional circuit is required. The adjustment can be conducted on drive level that uses MDFE channels. The method offers a more practical and cost-effective way to determine the write precompensation value especially in the mass production and fine adjustment

Keywords

decision feedback equalisers; digital magnetic recording; nonlinear distortion; M2DFE channel; MDFE channel; NLTS indicator; digital magnetic recording; multilevel decision feedback equalization; nonlinear distortion; nonlinear transition shift; write precompensation; Circuits; Clocks; Decision feedback equalizers; Detectors; Magnetic heads; Magnetic recording; Mass production; Memory; Nonlinear distortion; Sampling methods;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800717

Filename

800717