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Compressive (Microscan) Receivers

Compressive (Microscan) Receivers

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The name compressive receiver is given to this kind of receiver because a dispersive delay line (DDL) is used to compress the input radio-frequency (RF) signal to a narrow pulse. It is also referred to as a microscan receiver because a fast sweeping local oscillator (LO) is used to convert the input signals to frequency-modulated (FM) signals. The idea of using a DDL to measure frequency was patented in 1960. The advances in surface acoustic wave (SAW) technology and high-speed logic circuits have revitalized the interest in developing compressive receivers. This chapter discusses compressive receivers for electronic warfare application. It proves the principle of operations, mathematical analysis, and design considerations for compressive receivers.

Chapter Contents:

  • 8.1. Introduction
  • 8.2. Principle of Operation
  • 8.3. Mathematical Analysis
  • 8.4. Basic Equations
  • 8.5. Design Considerations
  • 8.6. Dispersive Delay (Compressive) Lines
  • 8.7. Folded Tape Meander Lines
  • 8.8. Surface Acoustic Wave (SAW) Dispersive Delay Lines
  • 8.9. Crimped Coaxial Dispersive Delay Lines
  • 8.10. Sweeping Local Oscillators
  • 8.11. Sweeping Local Oscillators Made of Dispersive Delay Lines
  • 8.12. Compressive Receiver with Interlace Scan
  • 8.13. Requirements of Logarithmic Amplifier
  • 8.14. Simple Threshold Detection Scheme
  • 8.15. Centroid Detection through Consecutive Comparator
  • 8.16. Peak Detection through Delay, Summing, and Compare Scheme
  • 8.17. Side Lobe Suppression through Dual-Detection Scheme
  • 8.18. Partially Intercepted Pulses and Other Signal Parameter Measurements by a Compressive Receiver
  • 8.19. Digitizing Circuit Considerations
  • 8.20. Trading of Time - Bandwidth Product for Wider Compressed Pulse
  • 8.21. Generalized Compressive Schemes
  • 8.22. Summary
  • References

Inspec keywords: delay lines; electronic warfare; frequency modulation; surface acoustic wave devices; oscillators; radio receivers

Other keywords: narrow pulse; compressive receivers; local oscillator; high speed logic circuits; electronic warfare; radiofrequency signal; surface acoustic wave technology; design consideration; dispersive delay line; frequency modulated signal; microscan receiver

Subjects: Electronic warfare; Acoustic wave devices; Pulse circuits; Electromagnetic compatibility and interference; Modulators, demodulators, discriminators and mixers; Passive filters and other passive networks; Radio links and equipment

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