Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Navigational
Reexamination Certificate
2005-03-08
2005-03-08
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Navigational
C342S050000
Reexamination Certificate
active
06864829
ABSTRACT:
The invention relates to a system for determining a position of a moving transponder adapted to receive a substantially stationary magnetic field signal and to transmit a further signal. The system comprises a signal generating arrangement adapted to generate said stationary magnetic field signal for said transponder, said transponder being adapted to determine a plurality of signal strengths of said received magnetic field signal; at least one signal receiving arrangement, adapted to receive said further signal of said transponder, said transponder being adapted to insert at least one message portion in said further signal indicative of at least one of said plurality of signal received signal strengths and processing means adapted to determine said position in accordance with a plurality of said received signal strengths determined by said moving transponder. This further signal can e.g. be an electromagnetic signal of high frequency that has a high bandwidth enabling the use of a large number of transponders in a sporting event. Furthermore, the power of an electromagnetic signal decreases less rapidly with the distance travelled, such that the high frequency signal can be received at a further distance from the transponder.
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Cenker et al., “Iterative Algorithms in Irregular Sampling: A First Comparison of Methods”, In Proceedings of ICCP/91, pp. 483-489, 1991.
Bervoets Alfonsus Maria
Hin Fransciscus Robertus A. C.
AMB IT Holding B.V.
Andrea Brian K
Gregory Bernarr E.
Koehler S.
Westman Champlin & Kelly P.A.
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