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:
Jun. 21, 2005
Filed:
Oct. 21, 2003
Mario Haselsteiner, Haibühl, DE;
Klaus Hofbeck, Neumarkt, DE;
Thomas Klement, Regensburg, DE;
Birgit Rösel, Regensburg, DE;
Arnd Stielow, Regensburg, DE;
Mario Haselsteiner, Haibühl, DE;
Klaus Hofbeck, Neumarkt, DE;
Thomas Klement, Regensburg, DE;
Birgit Rösel, Regensburg, DE;
Arnd Stielow, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method for determining the position of at least one second transmitting and receiving device () in respect of a first transmitting and receiving device in a passive access control system operating in the GHz range, comprising the steps of using a radar method, wherein signals (f, f) are received in the first transmitting and receiving device on the left-hand side and right-hand side of a modulation frequency (f), determining the distance of two signals (f, f) closest to the left-hand side and right-hand side modulation frequency (f) wherein the distance is proportional to the distance between the first transmitting and receiving device and at least one second transmitting and receiving device (), so that multipath propagations are not taken into consideration.