SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS
A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 9 - MAY 5, 2006
17 SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
Includes space systems telemetry; space communications networks; astronavigation and guidance; and spacecraft radio blackout.
For related information see also 04 Aircraft Communications and Navigation; and 32 Communications and Radar.
20060012155 NASA Glenn Research Center, Cleveland, OH, USA
Design and Testing of Space Telemetry SCA Waveform
Mortensen, Dale J.; Handler, Louis M.; Quinn, Todd M.; April 2006; 13 pp.; In English; 2005 Software Defined Radio Technical Conference and Product Exposition, 14-18 Nov. 2005, Orange County, CA, USA; Original contains color illustrations Contract(s)/Grant(s): WS 22-041-20-06 Report No.(s): NASA/TM-2006-214245; SDR-05-4.6-02; E-15490; Copyright; Avail.: CASI: A03, Hardcopy
A Software Communications Architecture (SCA) Waveform for space telemetry is being developed at the NASA Glenn Research Center (GRC). The space telemetry waveform is implemented in a laboratory testbed consisting of general purpose processors, field programmable gate arrays (FPGAs), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs). The radio hardware is integrated with an SCA Core Framework and other software development tools. The waveform design is described from both the bottom-up signal processing and top-down software component perspectives. Simulations and model-based design techniques used for signal processing subsystems are presented. Testing with legacy hardware-based modems verifies proper design implementation and dynamic waveform operations. The waveform development is part of an effort by NASA to define an open architecture for space based reconfigurable transceivers. Use of the SCA as a reference has increased understanding of software defined radio architectures. However, since space requirements put a premium on size, mass, and power, the SCA may be impractical for today s space ready technology. Specific requirements for an SCA waveform and other lessons learned from this development are discussed. Author
Software Development Tools; Signal Processing; Analog to Digital Converters; Transmitter Receivers; Field-Programmable Gate Arrays; Computer Programs; Aerospace Engineering
Source: NASA
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