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Optimizing Satellite Communications With Adaptive and Phased Array AntennasA new adaptive antenna array architecture for low-earth-orbiting satellite ground stations is being investigated. These ground stations are intended to have no moving parts and could potentially be operated in populated areas, where terrestrial interference is likely. The architecture includes multiple, moderately directive phased arrays. The phased arrays, each steered in the approximate direction of the satellite, are adaptively combined to enhance the Signal-to-Noise and Interference-Ratio (SNIR) of the desired satellite. The size of each phased array is to be traded-off with the number of phased arrays, to optimize cost, while meeting a bit-error-rate threshold. Also, two phased array architectures are being prototyped: a spacefed lens array and a reflect-array. If two co-channel satellites are in the field of view of the phased arrays, then multi-user detection techniques may enable simultaneous demodulation of the satellite signals, also known as Space Division Multiple Access (SDMA). We report on Phase I of the project, in which fixed directional elements are adaptively combined in a prototype to demodulate the S-band downlink of the EO-1 satellite, which is part of the New Millennium Program at NASA.
Document ID
20040105615
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Ingram, Mary Ann (Georgia Inst. of Tech. Atlanta, GA, United States)
Romanofsky, Robert (NASA Glenn Research Center Cleveland, OH, United States)
Lee, Richard Q. (NASA Glenn Research Center Cleveland, OH, United States)
Miranda, Felix (NASA Glenn Research Center Cleveland, OH, United States)
Popovic, Zoya (Colorado Univ. Boulder, CO, United States)
Langley, John (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Barott, William C. (Georgia Inst. of Tech. Atlanta, GA, United States)
Ahmed, M. Usman (Georgia Inst. of Tech. Atlanta, GA, United States)
Mandl, Dan (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
Meeting: ESTC 2004
Location: Palo Alto, CA
Country: United States
Start Date: June 21, 2004
End Date: June 23, 2004
Sponsors: European Space Agency. European Space Research and Technology Center, ESTEC
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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