Theoretical analysis of bit error rate considering intertrack crosstalk in digital magnetic recording equipment

Intertrack crosstalk evaluation is a very significant problem in high-track-density digital magnetic recording. This report is intended to introduce theoretical analyses of bit error rate with the existence of such crosstalk and Gaussian noise. Analytical expressions for the cross-talk are obtained considering the arctangent magnetization and only the longitudinal component of the magnetization vector, they are found to be practically useful. Then, taking the MFM {110} pattern as an example, the bit error rate is analyzed and simple approximated expressions are derived. In the process of these analyses, the pattern peak shift and reproduced waveform for MFM {110} are clarified analytically, and a comparison between crosstalk and Gaussian noise jitter is made.