Performance analysis of a digital image synthesizer as a counter-measure against inverse synthetic aperture radar

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02Sep_LeDantec.pdf (2.45 MB)
Authors
Le Dantec, Fernando A.
Subjects
Digital image synthesizer
DIS
Inverse synthetic aperture radar
ISAR
Synthetic aperture radar
SAR
False targets
Advisors
Pace, Phillip E.
Fouts, Douglas J.
Jenn, David C.
Date of Issue
2002-09
Date
September 2002
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
This thesis is concerned with the development of a model to analyze a Digital Image Synthesizer (DIS) integrated circuit designed to create false target images to deceive Inverse Synthetic Aperture Radar (ISAR). The DIS is able to recreate the scattering effect of a moving target by using appropriate phase and gain modulations on an intercepted ISAR chirp signal before retransmitting it with the proper time delay. The DIS signal processing and the ISAR compression of the modulated return are modeled to examine the range-Doppler profile of a synthesized false target image. The image is representative of the image that would appear on an ISAR display. ISAR image quality is used to evaluate different DIS architectures and bit formats. Evaluation of the image quality is based on the deviation from an infinite resolution false target image. The results obtained from evaluating different DIS architectures indicate that the design is tolerant of significant quantization errors. The model is used to validate the architecture of the integrated circuit being fabricated. Finally, various different ISAR integration times and pulse repetition frequencies are used to confirm the integrity of the model.
Type
Thesis
Description
URI
https://hdl.handle.net/10945/4955
Series/Report No
Department
Electrical and Computer Engineering
Organization
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NPS Report Number
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Funding
Format
xx, 134 p. : ill. (some col.)
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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