A Fourth-Order Imaging Algorithm for Spaceborne Bistatic SAR

Author

Zhong, Hua ; Liu, Xingzhao

Author_Institution

Dept. of Electron. Eng., Shanghai Jiaotong Univ., Shanghai

fYear

2006

fDate

July 31 2006-Aug. 4 2006

Firstpage

1196

Lastpage

1199

Abstract

Eldhuset´s research, the fourth-order Extended Exact Transfer Function (EETF4), indicates that the range history of a high spatial resolution spaceborne SAR can be modeled by a fourth-order Taylor expansion in azimuth time. In this paper, this point of view is introduced in bistatic SAR, and the transfer functions in the 2-D frequency and the range-Doppler domains are derived. Using this method, an efficient bistatic focusing solution based on squinted mode chirp scaling (CS) algorithm which accommodates both tandem and TI case is developed. Quantitative analysis and simulations are also provided.

Keywords

geophysical techniques; synthetic aperture radar; 2D frequency; CS algorithm; EETF4; bistatic focusing solution; fourth-order Extended Exact Transfer Function; fourth-order Taylor expansion; range-Doppler domains; spaceborne bistatic SAR; squinted mode chirp scaling algorithm; Azimuth; Chirp; Focusing; Frequency domain analysis; Geometry; High-resolution imaging; History; Spatial resolution; Transfer functions; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2006. IGARSS 2006. IEEE International Conference on

Conference_Location

Denver, CO

Print_ISBN

0-7803-9510-7

Type

conf

DOI

10.1109/IGARSS.2006.309

Filename

4241456