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:
Apr. 21, 2009
Filed:
Mar. 07, 2007
Murat Belge, Billerica, MA (US);
Christopher C. Cunningham, Brighton, MA (US);
Murat Belge, Billerica, MA (US);
Christopher C. Cunningham, Brighton, MA (US);
Aware, Inc., Bedford, MA (US);
Abstract
A three-port TDR front end includes numerous components. An exemplary three-port TDR front-end is a DSL modem. Information-bearing TDR signals are distorted as they pass through these components. With a perfect model of the response of its front-end, a TDR system usually can compensate for the effects of its front-end. In reality, however, electrical characteristics of each component vary slowly over time. The result is imperfect knowledge about the true response of the front-end, errors in the model of the front-end, and degraded TDR performance. It is important to calibrate the response of the TDR front-end through using a TDR modeling system that determines at least three respective responses when the third port is connected to each of at least three different devices, determining three parameters that characterize a front-end, and using the three parameters to predict the system response when the front-end is connected to any device.