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. 18, 2005
Filed:
Dec. 11, 2001
John Peter Carlson, Herndon, VA (US);
Thomas Booker Gravely, Herndon, VA (US);
Joseph P. Kennedy, Jr., Great Falls, VA (US);
John Peter Carlson, Herndon, VA (US);
Thomas Booker Gravely, Herndon, VA (US);
Joseph P. Kennedy, Jr., Great Falls, VA (US);
Grayson Wireless, Reston, VA (US);
Abstract
A system and method for determining the geolocation of autonomous mobile appliances emitting analog waveforms is disclosed. More specifically, the inventive system and method is used to geolocate FM analog signals such as those used in the AMPS cellular radio air standard by using a time difference of arrival ('TDOA') approach. The inventive system and method uses a novel approach to minimize the amount of data sent between location sensors and the central location processor comprising adaptive signal combining from N channel to a single channel, FM demodulation to reduce bandwidth, Fourier transformation for signal compression, and segmentation of the location sensors into primary and secondary modes to allow for parallel processing to ease the computational burden on the central location processor.