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Frequency Domain Beamforming for a Deep Space Network Downlink ArrayThis paper describes a frequency domain beamformer to array up to 8 antennas of NASA's Deep Space Network currently in development. The objective of this array is to replace and enhance the capability of the DSN 70m antennas with multiple 34m antennas for telemetry, navigation and radio science use. The array will coherently combine the entire 500 MHz of usable bandwidth available to DSN receivers. A frequency domain beamforming architecture was chosen over a time domain based architecture to handle the large signal bandwidth and efficiently perform delay and phase calibration. The antennas of the DSN are spaced far enough apart that random atmospheric and phase variations between antennas need to be calibrated out on an ongoing basis in real-time. The calibration is done using measurements obtained from a correlator. This DSN Downlink Array expands upon a proof of concept breadboard array built previously to develop the technology and will become an operational asset of the Deep Space Network. Design parameters for frequency channelization, array calibration and delay corrections will be presented as well a method to efficiently calibrate the array for both wide and narrow bandwidth telemetry.
Document ID
20150008789
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Navarro, Robert
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 26, 2015
Publication Date
March 3, 2012
Subject Category
Communications And Radar
Meeting Information
Meeting: 2012 IEEE Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 3, 2012
End Date: March 10, 2012
Sponsors: Prognostics and Health Management Society (PHM), Institute of Electrical and Electronics Engineers, American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Other
Keywords
Filterbank
Combining

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