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. 19, 2004
Filed:
Dec. 31, 2001
Carl M. Panasik, Garland, TX (US);
Steven C. Lazar, Plano, TX (US);
Madison F. Pedigo, McKinney, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A location determination apparatus, method and system ( ) that is an improvement upon existing location determining techniques. The invention enables precision indoor location determination through the use of non-DTV terrestrial broadcast signals (e.g. one way, wide area, dissemination of information)( ), or re-broadcast signals ( ) of the proposed (terrestrial based) digital satellite radio relay transmitters ( ) to provide position location. This solution does not require a local receiver to correct for long distance propagation dispersion, particularly for the satellite relay, as the digital radio satellites are already synchronized to GPS time. More specifically, the invention discloses two significant location detection concepts: A) local terrestrial transmitters ( ) provide information used to determine the location of an electronic apparatus; and B) local re-transmitters of satellite-distributed programming ( ) provide information used to determine the location of an electronic apparatus.