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:
Sep. 13, 2011
Filed:
Jun. 08, 2010
Hans Gregory Schantz, Huntsville, AL (US);
Alfred Hans Unden, Owens Cross Roads, AL (US);
Eric Richards, Madison, AL (US);
Robert Edward Depierre, Huntsville, AL (US);
Hans Gregory Schantz, Huntsville, AL (US);
Alfred Hans Unden, Owens Cross Roads, AL (US);
Eric Richards, Madison, AL (US);
Robert Edward Depierre, Huntsville, AL (US);
Q-Track Corporation, Huntsville, AL (US);
Abstract
A signal-of-opportunity location device (SOLD) that may be situated in a complex radio propagation environment with multiple RF signal obstructions receives RF signals from a distant transmitter. The RF signals from the distant transmitter interact with obstructions in the propagation environment local to the SOLD. The local obstructions perturb the RF signals causing the RF signals to exhibit near field behavior in the complex radio propagation environment. The SOLD receives the locally perturbed signals. The SOLD detects signal characteristics of RF signal components of the received signals and compares these signal characteristics with reference data in a reference data store to determine the current location of the SOLD.