Accession Number:

ADA381835

Title:

An All-Digital Image Synthesizer for Countering High-Resolution Imaging Radars

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

2000-09-01

Pagination or Media Count:

377.0

Abstract:

The subject of this thesis is a digital image synthesizer DIS, which is especially useful as a counter-targeting signal repeater, i.e., for synthesizing the characteristic echo signature of a pre-selected target. The DIS has a digital radio frequency memory DRFM and associated circuitry, including digital tapped delay lines and a modulator in each delay line to impose both amplitude and frequency modulation in each line. A unique property of the digital image synthesizer is its ability to synthesize false targets using wideband chirp signals of any duration. The system-on-a-chip uses a scalable CMOS technology that increases the bandwidth and sensitivity of such a repeater over prior analog-based systems. The application-specific integrated-circuit reduces the noise of the repeated signal, reduces the size and cost of such a system and permits real-time alteration of operating parameters, permitting rapid and adaptive shifting among different types of targets to be synthesized.

Subject Categories:

  • Radar Countermeasures
  • Active and Passive Radar Detection and Equipment
  • Computer Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE