Communications: directive radio wave systems and devices (e.g. – Return signal controls external device
Reexamination Certificate
2005-06-21
2005-06-21
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
C342S125000, C342S127000, C342S134000, C342S148000, C340S005200, C340S005310, C340S005720
Reexamination Certificate
active
06909396
ABSTRACT:
A method for determining the position of at least one second transmitting and receiving device (3) 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 (f1, f2) are received in the first transmitting and receiving device on the left-hand side and right-hand side of a modulation frequency (fmod), determining the distance of two signals (f1, f2) closest to the left-hand side and right-hand side modulation frequency (fmod) wherein the distance is proportional to the distance between the first transmitting and receiving device and at least one second transmitting and receiving device (3), so that multipath propagations are not taken into consideration.
REFERENCES:
patent: 4282524 (1981-08-01), Eymann et al.
patent: 4435709 (1984-03-01), Kipp
patent: 4646092 (1987-02-01), Schreuder
patent: 5381444 (1995-01-01), Tajima
patent: 5481504 (1996-01-01), Rosenbach et al.
patent: 5914683 (1999-06-01), O'Conner
patent: 6429804 (2002-08-01), Kishida et al.
patent: 6798339 (2004-09-01), Thompson
patent: 6809629 (2004-10-01), Heide et al.
patent: 6812823 (2004-11-01), Inaba et al.
patent: 6838976 (2005-01-01), Mindl et al.
patent: 2004/0125013 (2004-07-01), Haselsteiner et al.
Haselsteiner Mario
Hofbeck Klaus
Klement Thomas
Rösel Birgit
Stielow Arnd
Baker & Botts L.L.P.
Siemens Aktiengesellschaft
Sotomayor John B.
LandOfFree
METHOD AND DEVICE FOR DETERMINING THE POSITION OF AT LEAST... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with METHOD AND DEVICE FOR DETERMINING THE POSITION OF AT LEAST..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and METHOD AND DEVICE FOR DETERMINING THE POSITION OF AT LEAST... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3510150