Coded data generation or conversion – Digital code to digital code converters – To or from run length limited codes
Patent
1996-10-15
1999-01-12
Gaffin, Jeffrey A.
Coded data generation or conversion
Digital code to digital code converters
To or from run length limited codes
341 94, H03M 700
Patent
active
058596011
ABSTRACT:
Apparatus and method for coding to improve the minimum distance properties of sequence detectors operating at high densities in storage systems is presented. The coding scheme of the present invention is referred to as maximum transition run (MTR) code and eliminates data patterns producing long runs of consecutive transitions while imposing the usual k constraint necessary for timing recovery. The code has a distance gaining property similar to an existing (1,k) runlength-limited (RLL) code, but can be implemented with considerably higher code rates. When the MTR code is used with fixed delay tree search (FDTS) or high order partial response maximum likelihood (PRML) detectors, the bit error rate performance improves significantly over existing combinations of codes and detectors.
REFERENCES:
patent: 4760378 (1988-07-01), Iketani et al.
patent: 4775985 (1988-10-01), Busby
patent: 4779072 (1988-10-01), Van Gestel
patent: 5341134 (1994-08-01), Benjauhrit
patent: 5450443 (1995-09-01), Siegel et al.
patent: 5608397 (1997-03-01), Soljanin
Brickner Barrett J.
Moon Jaekyun
Gaffin Jeffrey A.
Kost Jason L. W.
Regents of the University of Minnesota
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