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:
Sep. 07, 2004
Filed:
Sep. 22, 2000
Ilan Reuven, Ramat Gan, IL;
Ayelet Shahar-Doron, Modi'in, IL;
Liron Frenkel, Netanya, IL;
Gilad Ayalon, Hod Hasharon, IL;
Tioga Technologies Inc., San Jose, CA (US);
Abstract
A method for decoding a sequence of symbols encoded by an encoding system with a plurality of possible states and transmitted over a channel, wherein the encoding system output can be represented by a trellis diagram. The method includes receiving a signal corresponding to the sequence of symbols transmitted over the channel and responsive to the signal, finding respective old state metrics for one or more of the possible states of the encoding system that correspond to a given symbol in the sequence. Respective transition metrics are determined for state transitions that link the one or more possible states for which the old state metrics were found to at least some of the possible states of the encoding system that correspond to a succeeding one of the symbols in the sequence. New state metrics are computed for the at least some of the possible states that correspond to the succeeding symbol, responsive to the respective old state metrics and to the transition metrics, such that when two or more of the transitions are linked to the same one of the possible states of the succeeding symbol, one of the transitions is chosen based on a criterion applied to the new state metrics. A subset of the at least some of the possible states that correspond to the succeeding symbol is selected based on the new state metrics and used in decoding the sequence of symbols.