Echo-Domain Phase Synchronization Algorithm for Bistatic SAR in Alternating Bistatic/Ping–Pong Mode

Author

He, Zhihua ; He, Feng ; Chen, Junli ; Huang, Haifeng ; Dong, Zhen ; Liang, Diannong

Author_Institution

Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China

Volume

9

Issue

4

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

604

Lastpage

608

Abstract

When bistatic synthetic aperture radar (SAR) works in alternating bistatic/ping-pong mode, it can perform phase referencing without a synchronization link between different satellites. The key to this is to extract a compensation phase from the bistatic echoes, including oscillator phase differences. An echo-domain phase synchronization algorithm using the correlation of bistatic echoes is proposed. Because of its larger equivalent synchronization frequency, the echo-domain algorithm has higher phase synchronization accuracy than the algorithm in the image domain. Experiments using simulated bistatic echoes with real single-stripmap SAR echo validate the proposed echo-domain phase synchronization algorithm.

Keywords

remote sensing by radar; spaceborne radar; synthetic aperture radar; alternating bistatic/ping-pong mode; bistatic echoes; bistatic synthetic aperture radar; echo-domain algorithm; echo-domain phase synchronization algorithm; equivalent synchronization frequency; image domain; oscillator phase differences; phase referencing; synchronization link; Azimuth; Correlation; Frequency synchronization; Noise; Synchronization; Synthetic aperture radar; Alternating bistatic/ping–pong mode; TanDEM-X; bistatic synthetic aperture radar (SAR); echo-domain algorithm; phase synchronization;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2011.2176714

Filename

6121897