Increased areal density using a 2-dimensional approach

There is a drive toward achieving much higher track density in magnetic rec ording. Increase in track density will produce more interaction/crosstalk b etween adjacent tracks. The simulated variation of bit error rate (BER) as a result of increased inter-track interference (ITI) using a Viterbi Detect or is presented in this paper. Results show that for a given BER and signal -to-noise ratio (SNR), different levels of ITI can be tolerated depending o n the code. Calculations suggest 2-Dimensional modulation codes designed fo r a channel experiencing ITI can result in up to 23 % gain in areal density .