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PIER PIER B PIER C PIER M PIER Letters
2009-08-26
Enhanced Range Alignment Using a Combination of a Polynomial and Gaussian Basis Functions
By
Sang-Hong Park,

    Prof. Sang-Hong Park

    Department of Electronics Engineering

    Pukyong National University

    Korea

    Homepage

Hyo-Tae Kim,

    Dr. Hyo-Tae Kim

    Electrical and Computer Engineering Division

    Pohang University of Science and Technology

    Korea

    Homepage

Kyung-Tae Kim

    Prof. Kyung-Tae Kim

    Department of Electrical Engineering

    Pohang University of Science and Technology

    Korea

    Homepage

Progress In Electromagnetics Research, Vol. 95, 381-396, 2009
doi:10.2528/PIER09062602
Abstract
For the inverse synthetic aperture radar (ISAR) imaging of a target at a long range, range alignment using the existing polynomial method brings about poor results because the flight trajectory changes depending on the initial position, and the motion parameters, meaning the polynomial cannot fit the trajectory. This paper proposes an improved range alignment method that models the trajectory using a combination of a polynomial and Gaussian basis functions. Initial parameters of the polynomial and Gaussian basis functions are determined by fitting the proposed model to the center of mass curve of the range profile history using the least square curve-fitting algorithm, and the optimum value is found using particle swarm optimization. This method is computationally more efficient and preserves the image quality.
Citation
Sang-Hong Park, Hyo-Tae Kim, and Kyung-Tae Kim, "Enhanced Range Alignment Using a Combination of a Polynomial and Gaussian Basis Functions," Progress In Electromagnetics Research, Vol. 95, 381-396, 2009.
doi:10.2528/PIER09062602
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