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:
Jan. 13, 2004
Filed:
Nov. 16, 1999
Brian P. Holt, Melbourne, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
A system and method of the present invention determines the location of a transmitting mobile unit. A mobile unit has a global positioning system (GPS) unit and transmitter for transmitting an RF signal that includes an identification of the mobile unit and GPS location coordinates, if available. At least one receiver forms a first infrastructure and is contained within an area having good GPS reception for receiving a transmitted signal from the mobile unit when in the area relating to the identification of the mobile unit and the GPS location coordinates or other GPS data obtained from the GPS unit. At least one receiver forms a second infrastructure and is contained within an area having poor GPS reception for receiving transmitted signals from the mobile unit when in the area relating to an identification of the mobile unit and for measuring the angle of arrival and/or time of arrival, multipath profile, or other characteristics of transmitted signals from the mobile unit. A processor determines the location of the mobile unit based on the measured time of arrival and/or angle of arrival.