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:
Aug. 08, 2000
Filed:
Oct. 03, 1997
P Michael Henderson, Tustin, CA (US);
Kenneth D Ko, Clearwater, FL (US);
Edward S Zuranski, Largo, FL (US);
Jamal Haque, Tampa, FL (US);
Shrenik P Patravali, St. Petersburg, FL (US);
Manuel I Rodriguez, St. Pete, FL (US);
Keith A Souders, Tampa, FL (US);
Anthony A Tzouris, Clearwater, FL (US);
Rockwell International Corporation, Costa Mesa, CA (US);
Abstract
A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit which includes a rapid retrain circuit. The rapid retrain circuit can retrain the digital subscriber line modem in less than 0.5 seconds.