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. 17, 2013
Filed:
Sep. 12, 2012
Kameswara Medapalli, San Jose, CA (US);
Robert G. Lorenz, Menlo Park, CA (US);
Bertrand Hochwald, Santa Clara, CA (US);
Arogyaswami Paulraj, Stanford, CA (US);
Kameswara Medapalli, San Jose, CA (US);
Robert G. Lorenz, Menlo Park, CA (US);
Bertrand Hochwald, Santa Clara, CA (US);
Arogyaswami Paulraj, Stanford, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Estimating a location of a subscriber, including receiving a request for the location, identifying a serving base station of the subscriber, receiving a downlink frame from the serving base station, obtaining a time delay of a signal transmitted between the subscriber and the serving base station, the obtaining including estimating a time of arrival by extracting information from the received downlink frame, the extracting including, determining a channel impulse response of the downlink frame, and estimating the time of arrival by comparing a peak time of the determined channel impulse response with a start time of the downlink frame, the start time being estimated based on the channel impulse response exceeding a predetermined threshold value, estimating a distance between the subscriber and the serving base station based on the time delay, and estimating the location based on the estimated distance between the subscriber and the serving base station.