Pulse or digital communications – Synchronizers
Reexamination Certificate
2011-03-22
2011-03-22
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Synchronizers
C375S355000, C375S356000, C375S357000, C375S359000, C375S371000, C455S502000, C455S500000, C455S507000
Reexamination Certificate
active
07912164
ABSTRACT:
A system includes first and second wireless nodes having a clock with plural times, a wireless transceiver, and a processor cooperating with the transceiver to transmit and receive packets. The second node transceivers wirelessly communicate with the first or other second node transceivers. The second nodes include a Kalman filter with an output, plural filter gains, and an input representing the difference between: about the time of the clock when a received packet should have ideally been received, and a time when the received packet was actually received as measured by the clock. A circuit provides dynamic adjustment of the filter gains. The Kalman filter output estimates the difference between the time of the receiving node clock and a corresponding one of the times of the transmitting node clock. The second processor cooperates with the Kalman filter output to adjust the times of the receiving node clock.
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Armstrong Brian S. R.
Pereira Luis R.
Rentel Carlos H.
Eaton Corporation
Fan Chieh M
Lee Siu M
Moran Martin J.
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