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. 24, 1987
Filed:
Mar. 13, 1985
Applicant:
Inventors:
Kenneth Martinez, Pinellas Park, FL (US);
Gregory Mack, St. Petersburgh, FL (US);
Assignee:
Paradyne, Largo, FL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ; H04L / ;
U.S. Cl.
CPC ...
375 75 ; 375 39 ; 375 99 ; 375118 ; 371 43 ;
Abstract
A Viterbi decoder is disclosed particularly suited for implementation in a microprocessor-based modem. The decoder calculates the branch metric corresponding to each point of a signal constellation by calculating the Euclidean distance between a received point and a subset of constellation points. Prior to the metric calculations, each received point is translated to the first quadrant and, if necessary, truncated.