Data-fusion receiver
Abstract
This invention is an ultra-low frequency electromagnetic telemetry receiver which fuses multiple input receive sources to synthesize a decodable message packet from a noise corrupted telemetry message string. Each block of telemetry data to be sent to the surface receiver from a borehole tool is digitally encoded into a data packet prior to transmission. The data packet is modulated onto the ULF EM carrier wave and transmitted from the borehole to the surface and then are simultaneously detected by multiple receive sensors disbursed within the rig environment. The receive sensors include, but are not limited to, electric field and magnetic field sensors. The spacing of the surface receive elements is such that noise generators are unequally coupled to each receive element due to proximity and/or noise generator type (i.e. electric or magnetic field generators). The receiver utilizes a suite of decision metrics to reconstruct the original, non noise-corrupted data packet from the observation matrix via the estimation of individual data frames. The receiver will continue this estimation process until: 1) the message validates, or 2) a preset "confidence threshold" is reached whereby frames within the observation matrix are no longer "trusted".
- Inventors:
- Issue Date:
- Research Org.:
- US Dept. of Energy (USDOE), Washington, DC (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1176039
- Patent Number(s):
- 7151466
- Application Number:
- 10/922,630
- Assignee:
- Gabelmann, Jeffrey M., Boerne, TX (United States)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04B - TRANSMISSION
- DOE Contract Number:
- FC26-02NT41656
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2004 Aug 20
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Gabelmann, Jeffrey M., Kattner, J. Stephen, and Houston, Robert A. Data-fusion receiver. United States: N. p., 2006.
Web.
Gabelmann, Jeffrey M., Kattner, J. Stephen, & Houston, Robert A. Data-fusion receiver. United States.
Gabelmann, Jeffrey M., Kattner, J. Stephen, and Houston, Robert A. Tue .
"Data-fusion receiver". United States. https://www.osti.gov/servlets/purl/1176039.
@article{osti_1176039,
title = {Data-fusion receiver},
author = {Gabelmann, Jeffrey M. and Kattner, J. Stephen and Houston, Robert A.},
abstractNote = {This invention is an ultra-low frequency electromagnetic telemetry receiver which fuses multiple input receive sources to synthesize a decodable message packet from a noise corrupted telemetry message string. Each block of telemetry data to be sent to the surface receiver from a borehole tool is digitally encoded into a data packet prior to transmission. The data packet is modulated onto the ULF EM carrier wave and transmitted from the borehole to the surface and then are simultaneously detected by multiple receive sensors disbursed within the rig environment. The receive sensors include, but are not limited to, electric field and magnetic field sensors. The spacing of the surface receive elements is such that noise generators are unequally coupled to each receive element due to proximity and/or noise generator type (i.e. electric or magnetic field generators). The receiver utilizes a suite of decision metrics to reconstruct the original, non noise-corrupted data packet from the observation matrix via the estimation of individual data frames. The receiver will continue this estimation process until: 1) the message validates, or 2) a preset "confidence threshold" is reached whereby frames within the observation matrix are no longer "trusted".},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 19 00:00:00 EST 2006},
month = {Tue Dec 19 00:00:00 EST 2006}
}