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:
Oct. 30, 2012
Filed:
Dec. 01, 2008
Vaibhav Dinesh, New Delhi, IN;
Kunal Raheja, Up, IN;
Amitkumar Mahadevan, Eatontown, NJ (US);
Patrick Duvaut, Tinton Falls, NJ (US);
Vaibhav Dinesh, New Delhi, IN;
Kunal Raheja, Up, IN;
Amitkumar Mahadevan, Eatontown, NJ (US);
Patrick Duvaut, Tinton Falls, NJ (US);
Ikanos Communications, Inc., Fremont, CA (US);
Abstract
Disclosed are various embodiments for determining a state of loop termination. One embodiment comprises receiving an un-calibrated echo signal for the loop under test using frequency domain reflectometry single-ended line testing (FDR-SELT) and determining the state of loop termination based on phase of the un-calibrated echo signal. The step of determining the state of loop termination comprises determining whether the loop is terminated by an open termination or a short termination by correlating the phase of the echo signal with an expected phase of the echo signal derived from measurements taken at the same loop length for open and short terminations. For other embodiments, the amplitude of the un-calibrated echo signal is analyzed to determine whether the loop is terminated by a matched-impedance termination.