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:
Nov. 14, 2000
Filed:
Mar. 26, 1998
Inkyu Lee, Edison, NJ (US);
Jeffrey Lee Sonntag, Allentown, PA (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A detector system employing a Viterbi algorithm includes an apparatus and method which constructs a double-state trellis structure for determining a most likely received symbol sequence with respect to an observed sequence of channel output samples. In the double state trellis, pairs of states are identified having equivalent branch metric values which also have a same decision during a path select, thus allowing these pairs of states to share a compare operation of a previous state metric. Consequently, to calculate an updated or current state metric value, an add, compare and select (ACS) circuit may compare only the previous state metric values to determine a minimum value for a transition between two states while combining each previous state metric value with its corresponding branch metric to provide an updated or current state metric value.