Student Paper 2.15
Spaceborne spotlight SAR processing using the frequency-scaling algorithm

Lihua Jin - Shanghai JiaoTong University, Xingzhao Liu - Shanghai JiaoTong University, Zhixin Zhou - Beijing Institude of Remote Sensing

Tue, 27 April 2004, 3:20 PM - 4:10 PM

Abstract

In this paper, the frequency scaling algorithm (FSA) has been introduced first to spaceborne spotlight SAR. According to the characteristics that the range time extension of the observed scene is smaller than the width of the transmitted pulse, FSA applied in airborne spotlight SAR dechirps on received echoes and reduces the sampling rate to release the computational burden. However in spaceborne SAR, the range extension is much larger and the bandwidth after dechirping increases instead so that the existing FSA cannot be adopted. To solve this problem, a method to perform directly frequency scaling on chirps in range direction has been proposed. And azimuth compression has also been applied to reduce PRF in azimuth direction. Finally, simulation results of point targets are given to demonstrate the validity and efficiency of the proposed algorithm.

Bios

Ms. Jin was born in 1979. she received BE degree in 2001,at Dept. of Electronic Engineering of Shanghai Jiao Tong University. Now she is working on his Ph.D at Electronic Engineering Department of Shanghai JiaoTong University. Her research interests include synthetic aperture radar imaging.

Dr. Xingzhao Liu - Shanghai JiaoTong University

Liu Xingzhao was in 1962 and received Ph. D. Degree in 1995 at the Dept. of EE of the University of Tokushima, Japan. Right now he is a professor at the Dept. of Electronic Engineering of Shanghai Jiaotong University. His interests mainly include signal processing for HF and SAR radar systems.