Two-dimensional coding for a multi-track recording system to combat inter-track interference

Abstract

Increasing track density, through a narrowing of the read head, leads to a reduced signal-to-noise ratio and increased inter-track-interference (ITI). Two-dimensional codes for multi-track recording systems have demonstrated increased capacity over conventional single track run length limited (RLL) codes. This paper describes a two-dimensional code for a multitrack recording system to control ITI by preventing adjacent track transitions. Results show that such a code, when applied to a PRML channel, can significantly improve immunity to crosstalk whilst maintaining a high linear density.