National Aeronautics and Space Administration 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

National Aeronautics and Space Administration Scope/Purpose of Presentation Uniqueness for SDRs 2 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

National Aeronautics and Space Administration SCAN Testbed Mission Research & Technology Objectives 3 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 SCAN Testbed Investigate the application of SDRs to NASA Missions –Mission advantages and unique development/verification/operations aspects –SDR reconfiguration, on-orbit reliability Launched to ISS on JAXA’s H-II Transfer Vehicle (HTV3) on July 20, 2012

National Aeronautics and Space Administration 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 Compliance verified w/ -tools -inspection -observation SCaN Testbed SDR Platform Descriptions 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 All SDR tested and flown with TDRSS-compliant waveforms.

National Aeronautics and Space Administration SCaN Testbed Flight System Connections

National Aeronautics and Space Administration SOIS Architecture – application to SDRs 6 Radios may make use of all services from Avionics.

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

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

National Aeronautics and Space Administration Command & Telemetry Info for EDS 9

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National Aeronautics and Space Administration Typical Telemetry information 13 1.Status (On/Off for controllable component, State (test, idle, running)) 2.Software & Firmware version information 3.Results of startup tests 4.Fault Diagnostic information (number of entries in logs) 5.Memory statistics 6.Configurable parameters for waveform (data rate, coding on/off, frequency selected, etc.) 7.Waveform status (Carrier lock, etc.) 8.Performance (SNR estimate, frame loss, etc.) Items 6-8 likely to be waveform dependent.

National Aeronautics and Space Administration Path Forward 14 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