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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.:

US 4571734 B1

PDFFull Text
Date of Patent:
Feb. 18, 1986

Filed:

Aug. 05, 1983

Method and apparatus for decoding the output signal of a

Applicant:
Inventors:

Francois B Dolivo, Wadenswil, CH;

Gottfried Ungerboeck, Langnau, CH;

Thomas D Howell, San Jose, CA (US);

Assignee:

International Business Machines Corporation, Armonk, NY (US);

Attorney:

Brodie; R. Bruce

Primary Examiner:

Benedict V Safourek

Assistant Examiner:

Stephen Chin

Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 18 ; 375102 ; 3403 / ;
Abstract

A maximum-likelihood sequence decoder is used with a partial-response signaling system for processing sequences of sampled values from a communication channel or recording device. The partial-response signals can be duobinary, dicode, or partial-response class-IV. The maximum-likelihood decoding for each sequence can be based upon a two-state trellis. Instead of two survivor metrics for two states, only a difference metric is necessary.

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Dolivo, Francois. (1986). Method and apparatus for decoding the output signal of a (U.S. Patent No. 4571734). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4571734

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