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. 02, 2005
Filed:
Mar. 30, 2001
Warner George Harrison, Medfield, MA (US);
Warner George Harrison, Medfield, MA (US);
Verizon Laboratories Inc., Waltham, MA (US);
Genuity, Inc., Cambridge, MA (US);
Abstract
A method and system for estimating the location of an injection point of foreign signals in a network comprises the steps of measuring signal samples at two points along the cable network distribution system, correlating the two signal samples to estimate propagation delay differences between the measurement locations and the source, and calculating the location and magnitude of the ingress. The propagation delay, or time correlation, is proportional to the offset of the injection point from the midpoint between the measurement sites, where the two parameters are related by the velocity of propagation in the cable. The amplitude of the correlation peaks represent the magnitude of the ingress at that location. Sensitivity may be increased by time-averaging the output of the correlation step. Multiple sources and/or ingress and egress sites may be measured simultaneously.