Increased Areal Density Using a 2-Dimensional Approach

There is a drive toward achieving much higher track density in magnetic recording. Increase in track density will pro- duce more interaction/crosstalk between adjacent tracks. The sim- ulated variation of bit error rate (BER) as a result of increased inter-track interference (ITI) using a Viterbi Detector is presented in this paper. Results showthat for a givenBERand signal-to-noise ratio (SNR), different levels of ITI can be tolerated depending on the code. Calculations suggest 2-Dimensional modulation codes de- signed for a channel experiencing ITI can result in up to 23% gain in areal density.