Title :
The ISAR range profile compensation of fast-moving target using the dechirp method
Author :
Aifang, Liu ; Xiaohua, Zhu ; Jinhui, Lu ; Zhong, Liu
Author_Institution :
Dept. of Electron. Eng., Nanjing Univ. of Sci. & Technol., China
Abstract :
Inverse synthetic aperture radar (ISAR) imaging of the fast-moving target is a very important task for many military and civilian applications such as satellite. This correspondence investigates the ISAR echo signal model of fast-moving target and analyzes its impacts on ISAR images firstly. The results show that the echo signal of each scatterer point of fast-moving target is approximately a chirp signal and the commonly used stretch process will cause one-dimensional (1-D) range profile aberration and performance deterioration of motion compensation method and ISAR two-dimensional (2-D) image blurring. Then, an effective algorithm using the dechirp method is proposed to deal with these problems above. The computer simulation experiment results have shown that the proposed algorithm can compensate the range profile aberration of fast-moving target effectively.
Keywords :
digital simulation; motion compensation; parameter estimation; radar imaging; synthetic aperture radar; 1D range profile aberration; 2D image blurring; ISAR echo signal model; ISAR images; ISAR range profile compensation; chirp signal; computer simulation; dechirp method; inverse synthetic aperture radar; motion compensation method; moving target; one dimensional range profile aberration; parameter estimation; performance deterioration; two dimensional image blurring; Chirp; Computer simulation; Image analysis; Inverse synthetic aperture radar; Military satellites; Motion compensation; Radar scattering; Signal analysis; Signal processing; Two dimensional displays;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281191
