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General ICD information for SDRs For consideration for EDS Development

General ICD information for SDRs For consideration for EDS Development. Sandra Johnson NASA Glenn Research Center, Cleveland, Ohio CCSDS Spring SOIS/APPS Working Group April 2013. Scope/Purpose of Presentation Uniqueness for SDRs.

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General ICD information for SDRs For consideration for EDS Development

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  1. General ICD information for SDRsFor consideration for EDS Development Sandra Johnson NASA Glenn Research Center, Cleveland, Ohio CCSDS Spring SOIS/APPS Working Group April 2013

  2. Scope/Purpose of PresentationUniqueness for SDRs Introduce the Space Communication and Navigation (SCaN) Testbed Describe the approach used by the SDRs to interface with Avionics (OBC) Smart device – processor within SDR – may be as capable as OBC EDS would reduce effort to integrate different vendor’s EDS and upgrade system to incorporate new waveforms / applications on the SDR Configuration files used to enable flexibility

  3. SCAN Testbed Mission Research & Technology Objectives • Investigate the application of SDRs to NASA Missions • Mission advantages and unique development/verification/operations aspects • SDR reconfiguration, on-orbit reliability SCAN Testbed • Develop SDR platform hardware & waveform firmware/software compliant to STRS to TRL-7 • Promote development and Agency-wide adoption of NASA’s SDR Standard, STRS • Flight-like ground EM and other equipment to enable the development, integration and operations of new SDR software on ISS. • Validate Future Mission Capabilities • Capability representative of future missions (S, Ka, GPS) • Communication, navigation, networking experiments • Launched to ISS on JAXA’s H-II Transfer Vehicle (HTV3) on July 20, 2012

  4. SCaNTestbed SDR Platform Descriptions • Compliance verified w/ • tools • inspection • observation All SDRtested and flown with TDRSS-compliant waveforms. General Dynamics TDRSS S-band (Tx & Rx) 1 - Virtex II Qpro FPGA, 3 M gate ColdFire microprocessor w/ VxWorks RTOS CRAM (Chalcogenide RAM) (4 Mb) STRS Advance STRS/SDR Platforms to TRL-7 Single standard on SDR and WF Harris • TDRSS Ka-band (Tx & Rx) • 4 - Virtex IV FPGAs • 1 - GFLOP DSP • AiTech 950 with VxWorks RTOS • Scrubbing ASIC JPL/L-3 CE • L-band receive (GPS) • TDRSS S-band • 2- Virtex II FPGA (3 M gates each) • Actel RTAX 2000 • Actel AT697 with SPARC V8 Processor using RTEMs OS

  5. SCaN Testbed Flight System Connections

  6. SOIS Architecture – application to SDRs Radios may make use of all services from Avionics.

  7. What is implemented in an SDR? Many experiments demonstrate capabilities across most layers Figure from CCSDS 130.0-G-2 “Overview of Space Communications Protocols • Software Defined Radios may implement all layers of the CCSDS stack • Boundary between OBC functions and Transceiver function may change depending on system

  8. Process to Date • Reviewed 3 SDR ICDs and developed table with generic ICD type information • Captured information that might be unique for SDR (vs. hardware SDR)

  9. Command & Telemetry Info for EDS

  10. Typical Telemetry information • Status (On/Off for controllable component, State (test, idle, running)) • Software & Firmware version information • Results of startup tests • Fault Diagnostic information (number of entries in logs) • Memory statistics • Configurable parameters for waveform (data rate, coding on/off, frequency selected, etc.) • Waveform status (Carrier lock, etc.) • Performance (SNR estimate, frame loss, etc.) Items 6-8 likely to be waveform dependent.

  11. Path Forward • For consideration: • Continue to gather ICD-type info for SDR • Design an EDS for an SDR • Implement EDS for an SDR • Start with hardware (dumb) transceiver? • Support dependent on schedule and availability of Avionics programmer

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