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. 04, 2006
Filed:
Feb. 13, 2004
Aled Wynne Jones, Harston, GB;
Paul Anthony Smith, Harston, GB;
Paul Joseph Bearpark, Waterbeach, GB;
Michael Raymond Reynolds, Royston, GB;
Daniel Reginald Ewart Timson, Harston, GB;
Andrew Michael Rhodes, Harston, GB;
Nicolas Vasilopoulos, Athens, GR;
Peter Duffet-smith, Cottenham, GB;
David Bartlett, St. Ives, GB;
Aled Wynne Jones, Harston, GB;
Paul Anthony Smith, Harston, GB;
Paul Joseph Bearpark, Waterbeach, GB;
Michael Raymond Reynolds, Royston, GB;
Daniel Reginald Ewart Timson, Harston, GB;
Andrew Michael Rhodes, Harston, GB;
Nicolas Vasilopoulos, Athens, GR;
Peter Duffet-Smith, Cottenham, GB;
David Bartlett, St. Ives, GB;
Scientific Generics Limited, Cambridgeshire, GB;
Abstract
A position determining system in which a mobile tag having an unknown position is tracked in space over time. In use, the mobile tag either transmits or receives signals including a pair of tones at different frequencies from a number of base stations having known locations. The phase of each of the received signals is then measured and the measured phases are then passed to a processing unit which determines the position of the tag at the time of the transmission of the signals on the basis of the difference between the measured phases of the two tones. In one embodiment, this system is combined with a conventional phase-based position measurement which is derived from phase measurements of similar tones transmitted between the mobile tag and different base stations.