Survey of Modern Signals Intelligence (SIGINT)

and the future of Electronic Support

Seminar Overview

You will learn the current methods and also the future problems expected. The emphasis is on signal interception and signal processing.

Seminar Outline

• Information Warfare and SIGINT
  • Coordination of many Disciplines

• The Signal Environment
  • Tomorrow's Threats plus Yesterday's and Today's
  • Generic Radar Signals and Intercept Receivers
  • Generic Receiver Sensitivity
  • Range Equations and the Ratio of Intercept to Radar Range
  • Warning Time and Receiver Sensitivity

• Wideband Receivers and how they are Different
  • Sensitivity, kTB, and the Wideband Receiver
  • Signal-to-Noise Ratio Required

• Probability of Intercept Problems and Solutions
  • Beam-on-Beam
  • Beam-on-Beam on Frequency
  • Narrowband Receivers vs Frequency Agile Signals

• Modern Signals are Different
  • History of LPI Radar
  • Today's LPI Radars
  • Deployed LPI Radars
  • Limit on Time-Bandwidth Product

• Interception of LPI Signals
  • Future ESM Receivers
  • Basic Sensitivity Enhancements
  • Intercepting Modern Radar

• Modern Radar Waveforms
  • Example for Existing Designs
  • Radar Rx Advantage
  • Role of Frequency Agility
  • Range Comparisons for "Pilot" Radar

• Signal Processing Techniques

• Non-Coherent Approach
  • Envelope Techniques
  • Required IF SNR
  • M/N Integration
  • RSSR Displays

• Coherent Approaches
  • Cross Correlation Method
  • Cross Correlation Performance
  • Performance Example
  • Choosing Correlation Parameters
  • Predetection ESM Sensitivity Enhancement
  • Wigner-Hough Transform
  • W-H SNR Improvement
  • W-H Transform Examples
  • Simultaneous Signals
  • Cyclostationary Spectrum Analysis
  • Higher Order Crossings

• Antenna Considerations and Direction Finding
  • Beamwidth/Field-of-View vs Gain
  • Amplitude Comparison D/F
  • Interferometers
  • Circular Arrays
  • Microwave Lens
  • Short Baseline TDOA/DF
  • Multiple Emitter D/F

• Emitter Location
  • SEAD Requirements
  • Triangulation
  • Algorithms and Bias Errors
  • TDOA Location-Long Baseline
  • TDOA Accuracy Considerations
  • Iterative and Non-Iterative Solutions

• PRI Sorting and Analysis Methods
  • Mean PRI or Least Mean Square Estimate?
  • Histograms
  • Delta-T and Complex Delta-T Histograms
  • Time Domain Filtering for Deinterleaving
  • Automated Deinterleaving
  • Adaptive and Tracking Techniques

• Typical RWR Uses of SIGINT Data
  • Emitter ID Tables
  • Reprogramming RWRs
  • Databases

• Airborne Jammer Example

• Implementation Problems

Seminar Materials Provided

Electronic Intelligence: The Analysis of Radar Signals, Richard G. Wiley, (Artech House, 1993), course notes and a certificate for 2.2 Continuing Education Units.

Instructor(s)

Richard G. Wiley, Ph.D., Vice President and Chief Scientist of RAS, Inc., has over 30 years of experience in ELINT/EW, specializing in signal analysis and receivers. He has a BS/MSEE degree from Carnegie-Mellon University and a Ph.D. from Syracuse University. He is a Fellow of the IEEE and has authored three books and twenty technical papers.