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:
Apr. 19, 2016
Filed:
Feb. 27, 2012
Pietro Porzio Giusto, Rome, IT;
Pietro Porzio Giusto, Rome, IT;
SISVEL TECHNOLOGY S.R.L., None (TO), IT;
Abstract
A method for estimating the distance (d) of a receiver () from a radio transmitter () includes the steps of: receiving () radio signals () irradiated by the transmitter (), which include components from which at least three tones () are extracted, each having a different frequency; measuring () a first phase difference (Δφ) between first two tones () of the at least three tones, whose frequencies (f, f) have a first spacing, and measuring a second phase difference (Δφ) between second two tones () of the at least three tones, whose frequencies (f, f) have a second spacing, wherein one of the first spacing or second spacing is greater than the other; estimating () the distance (d) on the basis of the first phase difference (Δφ) and the second phase difference (Δφ).