Autonomous Detection and Classification of Low Probability of Intercept Emitters
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Autonomous Detection and Classification of Low Probability of Intercept Emitters

This course will cover the fundamental design principles of LPI radar and the intercept receiver time-frequency and bi-frequency signal processing techniques that can extract the wideband waveform parameters.

8/31/2018 to 9/21/2018
When: 8/31/2018 - 9/21/2018
Where: Live Web Course - No Travel Required!
United States
Presenter: Dr. Phillip Pace

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Autonomous Detection and Classification of Low Probability of Intercept Emitters 

Course Length:  24 hours total - delivered across 8 sessions of 3-hours each 

This course will cover the unified presentation of the fundamental design principles of LPI radar. This includes a thorough treatment of the numerous types of wideband modulations that can be used to reduce the probability of a noncooperative intercept receiver’s ability to intercept and extract the waveform modulation parameters (which may easily lead to an effective jammer response). We will also cover the intercept receiver time-frequency and bi-frequency signal processing techniques that can extract the wideband waveform parameters. Autonomous classification and parameter extraction algorithms are also an objective such that a real-time jammer response can be developed – just what we did not want to happen! 


Instructor:  Dr. Phillip E. Pace

Dr. Pace is a professor in the Department of Electrical and Computer Engineering at the Naval Postgraduate School. He received the B.S. and M.S. degrees from the Ohio University in 1983 and 1986 respectively, and the Ph.D. from the University of Cincinnati in 1990 | all in electrical and computer engineering.


Agenda for topics covered in each 3-hour session:

  • Session 1 – Friday August 31st, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • The origin of LPI radar, comparing radar detection range to ELINT interception range, periodic ambiguity analysis, introduction to the perfect code, FMCW design concepts, the LPI ToolBox;
  • Session 2 - Friday September 7th, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • Important polyphase modulation codes, Frequency shift keying, Costas sequences and primitive roots, noise waveforms 
  • Session 3 - Monday September 10th, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • Case study (bringing it all together), advanced topics in LPI emitter design (STAR system technology)           
  • Session 4 – Wednesday September 12th, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • ELINT strategies needed for interception of LPI emitters, classical methods, new ELINT receiver technologies, the Wigner-Ville Distribution, understanding the time-frequency plane, new results against LPI emitter modulations
  • Session 5 – Friday September 14th, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • Quadrature mirror filtering, wavelet decomposition of LPI modulations, unique noise activities
  • Session 6 – Monday September 17th, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • Cyclostationary signal processing, FFT accumulation methods, direct frequency smoothing LPI results
  • Session 7 – Wednesday September 19th, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • Autonomous feature extraction and feature vector formation; Neural, nonlinear autonomous classifiers 
  • Session 8 – Friday September 21st, 2018, 13:00-16:00 EDT (17:00-20:00 UTC)
    • Autonomous modulation parameter extraction, polyphase parameters from the Wigner-Ville distribution, quadrature mirrors

PLEASE NOTE:  This course will be delivered through Adobe Connect. To ensure your computer system has access to Adobe Connect, please test your system HERE.  Each session will be recorded and made available to all registrants for 30 days after the course.  If you miss a session or two, you can catch up by viewing the recording!


Intended audience:

The course is designed to meet the needs of electrical engineering, physics and systems engineering students at the senior undergraduate and beginning graduate levels and especially those of practicing electronic warfare engineers. 


Course Materials:

  • Students will be able to download all presentation slides during each session - both live and from the recording.
  • Students need to purchase their own copy of the text book, Detecting and Classifying Low Probability of Intercept Radar, Second Edition
  • Students will need to supply their own copy of MATLAB Software.


  • $1,600 for AOC Members
  • $1,650 for non-members



With over 13,000 members internationally, the Association of Old Crows is an organization for individuals who have common interests in Electronic Warfare (EW), Electromagnetic Spectrum Management Operations, Cyber Electromagnetic Activities (CEMA), Information Operations (IO), and other information related capabilities. The Association of Old Crows provides a means of connecting members and organizations nationally and internationally across government, defense, industry, and academia to promote the exchange of ideas and information, and provides a platform to recognize advances and contributions in these fields.
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