Title :
An optimization of modulation codes in digital recording
Author :
Horiguchi, T. ; Morita, K.
Author_Institution :
Nippon Electric Co., Ltd., Kawasaki, Japan
fDate :
11/1/1976 12:00:00 AM
Abstract :
A few new modulation codes(or run-length-limited codes) in digital magnetic recording is presented. Linear density limits of the new codes and the existing codes are evaluated for a typical recording channel. One of the new codes shows the highest linear density limit among the existing codes and is improved over, for example, MFM and 4/5-rate-NRZI codes by about 20% to 30% in the density limit for the channel. A method for constructing the new codes is presented.
Keywords :
Magnetic recording/recording materials; Run-length coding; Binary codes; Binary sequences; Data mining; Digital magnetic recording; Digital modulation; Digital recording; Magnetic force microscopy; Magnetic modulators; Magnetic recording; Modulation coding;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1976.1059222
