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:
Feb. 07, 2023
Filed:
Feb. 06, 2020
Applicant:
Raytheon Systems Limited, Glenrothes, GB;
Inventor:
Aled Catherall, Cambridge, GB;
Assignee:
RAYTHEON SYSTEMS LIMITED, Glenrothes, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 21/16 (2006.01); H04W 4/02 (2018.01); H04W 48/04 (2009.01); G01S 19/49 (2010.01);
U.S. Cl.
CPC ...
G01S 19/49 (2013.01); G01C 21/165 (2013.01); H04W 4/023 (2013.01); H04W 4/025 (2013.01); H04W 48/04 (2013.01);
Abstract
A method and apparatus for improving a dead reckoning estimate of a mobile unit is described. When an accurate position cannot be determined for a mobile unit, for example if GPS is unavailable, a dead reckoning estimate can be improved when two or more mobile units share their position estimates and the shared position estimates are used with either the range between the two units or knowledge that the units are within a threshold distance of each other to refine the position estimate of at least one unit.