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:
Jun. 30, 1987
Filed:
Mar. 01, 1985
Applicant:
Inventors:
William L Betts, St. Petersburg, FL (US);
Kenneth Martinez, Pinellas Park, FL (US);
Assignee:
Paradyne Corporation, Largo, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; H03M / ;
U.S. Cl.
CPC ...
371 43 ; 3403 / ; 371-2 ; 375 26 ; 375 39 ;
Abstract
In the transmitter of a data communication system using QAM, a trellis coder with k-baud delay units is used for forward error correction. The output of the encoder is modulated using QAM to generate sequential baud signal elements. The redundant data bits generated are distributed among several non-consecutive bauds. At the receiver a plurality of distributed convolutional decoders are utilized to decode the received signal element. The distributed trellis decoder is self-synchronizing.