A Multitrack Coding Scheme Designed for Perpendicular Recording Using Double Layer Medium and MR Head
Atsushi KIKAWADA, Naoki Honda, K. Ouchi · Journal of the Magnetics Society of Japan · 1997
A new multitrack coding scheme is proposed as a preferable use in perpendicular recording using a double layer medium and an MR head. The coding uses combinations of three codes in 8 orthogonal codes based on Hadamard matrix elements. The new coding method has a high code rate and reliability because of the multilevel correlation detection due to simultaneous reading of three tracks. The performances are investigated by theoretical calculations, simulations and experiments.