Title :
Modulation codes for the controlled polarity recording channel
Author :
Swanson, Robert E.
Author_Institution :
Seagate Technol., Scotts Valley, CA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
Peak detection, because of simplicity, remains a practical channel for magnetic tape recording even at densities above 80 kfci. Recently, write equalization has been shown to be useful in controlling the polarity of adjacent recorded transitions. By this method the data density is improved to 120-160 kbpi. Because consecutive same polarity data pulses give rise to charge accumulation new channel codes are needed to regulate the number of consecutive same polarity pulses. This paper presents codes applicable to these new channels
Keywords :
channel coding; magnetic recording; modulation coding; charge accumulation; controlled polarity recording channel; data density; data pulse; magnetic tape recording; modulation code; peak detection; write equalization; Eigenvalues and eigenfunctions; Frequency; Joining processes; Modulation coding; Space vector pulse width modulation; Timing; Writing;
Journal_Title :
Magnetics, IEEE Transactions on
