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:
May. 14, 2013
Filed:
Apr. 05, 2010
Raul Hernan Etkin, San Francisco, CA (US);
Erik Ordentlich, San Jose, CA (US);
Michael Renne Ty Tan, Menlo Park, CA (US);
Raul Hernan Etkin, San Francisco, CA (US);
Erik Ordentlich, San Jose, CA (US);
Michael Renne Ty Tan, Menlo Park, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A first node in a wireless network transmits a periodic pilot signal to a second node. The second node receives the periodic pilot signal and retransmits the signal back to the first node. The retransmitted pilot signal includes a phase adjustment in view of an internal processing delay at the second node. The phase adjustment involves matching a phase of the retransmitted pilot signal to a phase of the received pilot signal. The first node measures a roundtrip delay of the pilot signal and the distance between the nodes is computed based at least on the measured roundtrip delay.