The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 1996
Filed:
Nov. 16, 1993
Applicant:
Inventors:
David M Blaker, Emmaus, PA (US);
Gregory S Ellard, Forest Park, PA (US);
Mohammad S Mobin, Whitehall, PA (US);
Homayoon Sam, Wescosville, PA (US);
Assignee:
AT&T Corp., Murray Hill, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ; H04L / ;
U.S. Cl.
CPC ...
375340 ; 375264 ; 375261 ; 329304 ;
Abstract
Convolutionally encoded information subjected to channel intersymbol interference is decoded by calculating the minimum cost path through a trellis. The trellis terminates in known states. Exploiting the open architecture of the coprocessor, the minimum cost state is checked to ascertain if it is the known, that is, correct state and if it is not, the possible known states are searched by the DSP inside the ECCP active register and the state with the lowest cost amont the possible states is selected.