Title :
Biased run-length limited modulation [for magnetic recording]
Author :
Weathers, A.D. ; Wolf, J.K.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
An interpretation for controlled polarity modulation that allows the write waveforms to be generated using a standard run-length limited modulator is presented. The output of the run-length limited modulator passes through a digital filter and is then shifted up in frequency via amplitude modulation. This resultant signal has a bias signal added to complete the process. The algorithm is demonstrated using a (2,7) constraint that is modified in a way that allows a peak detector to be used during the reading process
Keywords :
digital filters; equalisers; magnetic recording; modulation; signal processing; algorithm; amplitude modulation; bias signal; biased modulation; controlled polarity modulation; digital filter; magnetic recording; peak detector; run-length limited modulator; write equalisation; write waveforms; Amplitude modulation; Boosting; Control systems; Digital filters; Digital modulation; Frequency; Magnetic modulators; Magnetic recording; Modulation coding; Predictive models;
Journal_Title :
Magnetics, IEEE Transactions on
