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Soft Decision Analyzer Performs Real-time Analysis of RF Signals
August 16, 2011

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    › Applications
    › Licensing and Partnering Opportunity
    › Contact Information

Innovators at NASA's Johnson Space Center have developed a hardware, firmware, and software-based system that performs real-time closed loop statistical analysis of single- or dual-channel serial digital radio frequency (RF) communications systems operating in very low signal-to-noise conditions. The Soft Decision Analyzer (SDA) provides comprehensive soft decision data statistics measurements and near-real-time noise distribution profiles. The innovation's closed-loop detection allows it to simulate a live system and correlate observations with frame, codeword, and packet losses as well as quality of service and quality of experience events. The SDA offers continuous four-quadrant tracking for multiple modulation schemes and signal-to-noise ratio measurements using three separate techniques that work even in the presence of symbol-clipping. This software may be released for U.S. Government purposes only.


  • Versatile: Provides flexible data correlation, with continuous monitoring of 4 quadrants
  • Comprehensive: Offers wide-ranging soft decision statistical measurements
  • Powerful: Features early detection of problems with rapid resolution
  • Extensible: Publishes data output in a spreadsheet or extensible markup language (XML) format, allowing for easy organization and rapid results presentation


  • Potential applications in commercial, defense, and aerospace satellite communications fields to identify and address Quality of Service (QoS) and Quality of Experience (QoE) events

Licensing and Partnering Opportunity

This technology is being made available through JSC's Technology Transfer and Commercialization Office, which seeks to transfer technology into and out of NASA to benefit the space program and U.S. industry. NASA invites companies to consider licensing this technology for commercial applications.

Contact Information

If you would like more information about this technology or about NASA's technology transfer program, please contact:

Technology Transfer and Commercialization Office
NASA's Johnson Space Center
Phone: 281-483-3809
E-mail: jsc-techtran@mail.nasa.gov

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Page Last Updated: January 16th, 2014
Page Editor: NASA Administrator