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:
Dec. 11, 2012
Filed:
Oct. 10, 2011
Tariqul Islam, Germantown, MD (US);
John Carlson, Dulles, VA (US);
Khalid Al-mufti, Sterling, VA (US);
Ariful Hannan, Sterling, VA (US);
Tariqul Islam, Germantown, MD (US);
John Carlson, Dulles, VA (US);
Khalid Al-Mufti, Sterling, VA (US);
Ariful Hannan, Sterling, VA (US);
Andrew LLC, Hickory, NC (US);
Abstract
A system and method for estimating a location of a wireless device in a wireless communication system having a plurality of nodes and a plurality of location measurement units ('LMUs'). A set of signal samples from a first wireless device and a second wireless device may be collected by one or more LMUs in a search window. A first time of arrival ('TOA') is determined, and a second search window is estimated as a function of the first TOA. A second TOA may be determined within the second search window at a second node or one of the LMUs from the set of signal samples. A range estimate of the wireless device may then be determined, and an estimated location of the wireless device may be determined as a function of the first uplink TOA, the second uplink TOA, or the range estimate and second TOA.