Excavating
Patent
1993-12-16
1996-02-13
Ramirez, Ellis B.
Excavating
371 43, 341 59, 360 39, H03M 1300
Patent
active
054916984
ABSTRACT:
To improve data detection reliability in a coded maximum likelihood signal processing channel, two counters count the number of times actual values of linear functions of digital sample values corresponding to one and another preselected data patterns are within m units above and m units below, respectively, a preselected decision boundary used to determine whether detected data corresponding to a coded sequence of runlength limited code is a "1" or a "0". A difference count has a magnitude and sign denoting difference between counts in the two counters. After N occurrences of each preselected data pattern irrespective of how far from the boundary, the boundary is adjusted upwardly or downwardly, provided the difference count at least equals +S or at most -S, respectively.
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Patel Arvind M.
Rutledge Robert A.
So Bum S.
International Business Machines - Corporation
Otto, Jr. Henry E.
Ramirez Ellis B.
Shah Kamini
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