Intermodulation in Channelized Digital ESM Receivers.

Abstract

This thesis investigates intermodulation distortion generated by analog-to-digital converters (ADCs) in a channelized digital ESM receiver when processing multiple signals simultaneously. The spurious free dynamic range (SFDR) associated with this distortion is discussed. Two methods for increasing the spurious free dynamic range are evaluated. First, by adding a small amount of Gaussian noise to the input of the receiver, the intermodulation distortion is found to be reduced significantly. Second, by using a narrow bandwidth sub-Nyquist sampling rate with high dynamic range ADCs it is possible to increase the spurious free dynamic range of the digital receiver. The first method is a simple approach but the ability to increase the SFDR is limited. The second method is more effective but requires greater computation and complex receiver design.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1996
Accession Number
ADA320554

Entities

People

  • Ming-jen Cheng

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Electronic Warfare
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Bandwidth
  • Computations
  • Converters
  • Distortion
  • Dynamic Range
  • Electronic Warfare
  • Frequency
  • Frequency Agility
  • Frequency Bands
  • Frequency Domain
  • High Dynamic Range
  • Intermodulation
  • Local Oscillators
  • Noise
  • Radio Frequency
  • Sine Waves
  • Warfare

Fields of Study

  • Engineering
  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Electronics Engineering
  • Image Processing and Computer Vision.