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GD SDR Automatic Gain Control Characterization TestingThe General Dynamics (GD) S-Band software defined radio (SDR) in the Space Communications and Navigation (SCAN) Testbed on the International Space Station (ISS) will provide experimenters an opportunity to develop and demonstrate experimental waveforms in space. The GD SDR platform and initial waveform were characterized on the ground before launch and the data will be compared to the data that will be collected during on-orbit operations. A desired function of the SDR is to estimate the received signal to noise ratio (SNR), which would enable experimenters to better determine on-orbit link conditions. The GD SDR does not have an SNR estimator, but it does have an analog and a digital automatic gain control (AGC). The AGCs can be used to estimate the SDR input power which can be converted into a SNR. Tests were conducted to characterize the AGC response to changes in SDR input power and temperature. This purpose of this paper is to describe the tests that were conducted, discuss the results showing how the AGCs relate to the SDR input power, and provide recommendations for AGC testing and characterization.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Nappier, Jennifer M.
(NASA Glenn Research Center Cleveland, OH, United States)
Briones, Janette C.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 27, 2013
Publication Date
January 1, 2013
Subject Category
Communications And Radar
Report/Patent Number
Meeting Information
Meeting: Wireless Innovation Forum Conference
Location: Washington, DC
Country: United States
Start Date: January 8, 2013
Funding Number(s)
WBS: WBS 553323.
Distribution Limits
Work of the US Gov. Public Use Permitted.
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