Experimental performance comparison of FDTS/DF detectors: 8/9 (0,k) vs. 4/5 MTR codes

Author

Keirn, Zachary A. ; McCarthy, Steven G.

Author_Institution

Maxtor Corp., Longmont, CO, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2731

Lastpage

2733

Abstract

The performance of an FDTS/DF detector is compared using two different RLL coding techniques. The new Maximum Transition Run (MTR) codes have been proposed for use with FDTS/DF detectors because of demonstrated coding gains. This work compares the performance of an 8/9 (0,4/4) code to a 4/5 MTR code using actual MR head signals captured from a spinstand. The coding gain is evaluated in the presence of real write process non-linearity that exists at high linear densities. The error rate performance is compared at User Bit Densities (UBD) ranging from 2.2 to 2.9. A technique similar to Sequenced Amplitude Margin is used to assess error rate performance for the FDTS/DF detector. Final results are also compared to PR4 and RAM-DFE detectors

Keywords

coding errors; decision feedback equalisers; magnetic heads; magnetic recording; magnetoresistive devices; maximum likelihood detection; runlength codes; 4/5 MTR codes; 8/9 (0,4/4) code; 8/9 (0,k) code; FDTS/DF detectors; MR head signals; PR4 detectors; RAM-DFE detectors; RLL coding techniques; coding gains; error rate performance; fixed delay tree search with decision feedback; high linear densities; magnetoresistive head; maximum transition run codes; nonlinear transition shift; sequenced amplitude margin; spinstand; user bit densities; write process nonlinearity; Convolutional codes; Delay; Detectors; Error analysis; Feedback; Magnetic heads; Magnetic recording; Magnetic separation; Maximum likelihood detection; Oscilloscopes;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617712

Filename

617712