Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Reexamination Certificate
2007-12-25
2007-12-25
Edwards, Jr., Timothy (Department: 2612)
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through well fluids
C340S853200, C340S854300
Reexamination Certificate
active
11102006
ABSTRACT:
A system and methods of transmitting information between a first location and a second location comprise transmitting a data signal and a known signal from one of the first location and the second location over a signal channel having a first noise component. A second noise component is measured in a noise channel adjacent the signal channel. The data signal, the known signal, and the first noise component are received at the other location. The first noise component is estimated based on the second noise component. The estimated noise component is combined with the received data signal and the received known signal to generate noise-cancelled received data and received known signals. The noise-cancelled received known signal is processed to obtain an estimate of the channel transfer function. The estimated channel transfer function is combined with the noise-cancelled received data signal to reconstruct the transmitted data signal.
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Aronstam Peter S.
Fincher Roger W.
Watkins Larry A.
Baker Hughes Incorporated
Edwards, Jr. Timothy
Madan Mossman & Sriram P.C.
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