Title :
Improved distance M-ary (d,k) codes for high density recording
Author :
McLaughlin, S.W.
Author_Institution :
Dept. of Electr. Eng., Rochester Inst. of Technol., NY, USA
fDate :
3/1/1995 12:00:00 AM
Abstract :
We consider the problem of coding for a high density recording channel. New recording media have been developed that support unsaturated, M-ary (M/spl ges/3) signaling. This paper is concerned with the analysis and design of M-ary runlength limited (RLL) codes for multi-amplitude, linear recording AWGN channels. The codes achieve the largest known coding density and have improved minimum distance over an ordinary Adler-Coppersmith-Hassner code designed via the state splitting algorithm. Comparisons are made with Ungerboeck-style trellis codes with comparable complexity.<>
Keywords :
Gaussian noise; channel coding; digital magnetic recording; error statistics; magnetic disc storage; magnetic recording noise; runlength codes; white noise; M-ary (d,k) codes; additive white Gaussian noise channel; code complexity; coding density; error probability; high density recording; minimum distance; multiamplitude linear recording channels; recording channel coding; runlength limited codes; Area measurement; Density measurement; Error probability; Laser transitions; Magnetic heads; Magnetic recording; Modulation coding; Optical recording; Optical saturation; Timing;
Journal_Title :
Magnetics, IEEE Transactions on
