Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2011-01-18
2011-01-18
Bugg, George A (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S541000, C342S047000, C702S158000, C455S425000, C235S375000
Reexamination Certificate
active
07872583
ABSTRACT:
A method and system for a long range Radio Frequency (RF)-based identification, tracking and locating of objects. The method and system use a narrow bandwidth ranging signal(s), including VHF of lower frequency bands, which minimizes propagation loss and loss of accuracy of the RF locating signals. The method and system includes narrow bandwidth ranging signal multi-path mitigations processor, which further improves the track-locate accuracy. The signal is sent from a Master Unit(s) to a Tag. The signal traveling time is recorded and the distance between the Master(s) and the Tag is calculated. The method and system allow achieving a longer distance of the RF narrow bandwidth ranging signal penetration and an increased accuracy by using VHF bands in conjunction with the narrow bandwidth ranging signal multi-path mitigations processor. The techniques of Digital Signal Processing and Software-Defined Radio are used. The actual waveforms transmitted and received by the radios are defined by the software. The roles of the Master Unit(s) and the Tag can be reversed.
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Markhovsky Felix
Prevatt Truman
Weill Lawrence
Yushkov Andrey
Zhulanov Vladimir
Bardmesser Law Group
Bugg George A
InvisiTrack, Inc.
Labbees Edny
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