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. 19, 2015
Filed:
Mar. 14, 2012
Christopher Brian Marshall, Surrey, GB;
Christopher Brian Marshall, Surrey, GB;
U-BLOX A.G., Thalwil, CH;
Abstract
A method and apparatus for assisting the calculation of the position of a receiver device (), by observing a transmitted signal having a known structure. The method comprises: comparing (S) the time of arrival, at a reference position (X), of a first portion of the signal with the time of arrival at the receiver, at an unknown position (Y), of a second portion of the signal; obtaining (S) a local wave propagation model of the signal, the model comprising an estimate of the direction of propagation of the signal in the neighborhood of the reference position and unknown position; and using (S) the direction of propagation and the result of the comparison to assist in the calculation of the unknown position relative to the reference position.