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:
Mar. 06, 2012
Filed:
Dec. 15, 2008
Charles B. Swope, Coral Springs, FL (US);
Armando J. Gonzalez, Miami, FL (US);
Charles R. Ruelke, Margate, FL (US);
Charles B. Swope, Coral Springs, FL (US);
Armando J. Gonzalez, Miami, FL (US);
Charles R. Ruelke, Margate, FL (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A reference device determines its distance from a communication device by first using a training process to determine a calibrated time delay for the communication device when the communication device is at a known distance from the reference device. The calibrated time delay is a steady state internal processing delay for the communication device. Subsequently, when the reference device is at an unknown distance from the communication device, the reference device determines the unknown distance using the previously determined calibrated time delay along with a measured signal travel time at the unknown distance.