Focusing ISAR Images using the Adaptive Local Polynomial Fourier Transform

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Authors
  1. Thayaparan, T.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
The adaptive local polynomial Fourier transform (LPFT) is employed for the improvement of the ISAR images in complex reflector geometry cases, as well as in cases of fast maneuvering targets. It has been shown that this simple technique can produce significantly improved results with a relatively modest calculation burden. Two forms of the adaptive LPFT are proposed. The adaptive parameter in the first form is calculated for each radar chirp. An additional refinement is performed by using the information from the adjacent chirps. The second technique is based on the determination of the adaptive parameter for different parts of the radar image. The numerical analysis demonstrates the accuracy of the proposed techniques. It is important to note that the proposed technique does not assume any particular model of radar target motion. It can be applied for any realistic motion of targets.

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Keywords
SAR;ISAR;Local Polynomial Fourier Transform;Time-Frequency Analysis;Moving Targets;Target Detection;Fourier Transform;Doppler Processing;Image Analysis
Report Number
DRDC-OTTAWA-TM-2006-185 — Technical Memorandum
Date of publication
01 Sep 2006
Number of Pages
50
DSTKIM No
CA028039
CANDIS No
525947
Format(s):
CD ROM

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