An all-digital image synthesizer for countering high-resolution imaging radars

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Author
Ekestorm, Stig R.T.
Karow, Christopher
Date
2000-09Advisor
Pace, Phillip E.
Second Reader
Surratt, Robert E.
Metadata
Show full item recordAbstract
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
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Related items
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