TY - JOUR
T1 - Accurate Reconstruction and Suppression for Azimuth Ambiguities in Spaceborne Stripmap SAR Images
AU - Chen, Jie
AU - Wang, Kai
AU - Yang, Wei
AU - Liu, Wei
N1 - Publisher Copyright:
© 2004-2012 IEEE.
PY - 2017/1
Y1 - 2017/1
N2 - In this letter, an accurate mathematical model for azimuth ambiguity in stripmap synthetic aperture radar (SAR) images is first constructed, with an azimuth ambiguity factor (AAF) defined as the residual amplitude and phase terms of ambiguities. Next, a novel framework for reconstructing and suppressing azimuth ambiguity is proposed based on the analysis of the AAF. In this framework, azimuth ambiguities are accurately reconstructed by applying reconstruction filters in the range Doppler and 2-D frequency domain, and then, the reconstructed signal is used for suppressing azimuth ambiguities. Moreover, the proposed framework does not depend on the statistical characteristics of a SAR image and is capable of reducing the space-variant ambiguities. As verified by both simulated data and real TerraSAR-X data, the proposed method is capable of suppressing azimuth ambiguities in SAR images.
AB - In this letter, an accurate mathematical model for azimuth ambiguity in stripmap synthetic aperture radar (SAR) images is first constructed, with an azimuth ambiguity factor (AAF) defined as the residual amplitude and phase terms of ambiguities. Next, a novel framework for reconstructing and suppressing azimuth ambiguity is proposed based on the analysis of the AAF. In this framework, azimuth ambiguities are accurately reconstructed by applying reconstruction filters in the range Doppler and 2-D frequency domain, and then, the reconstructed signal is used for suppressing azimuth ambiguities. Moreover, the proposed framework does not depend on the statistical characteristics of a SAR image and is capable of reducing the space-variant ambiguities. As verified by both simulated data and real TerraSAR-X data, the proposed method is capable of suppressing azimuth ambiguities in SAR images.
KW - Ambiguity reconstruction
KW - ambiguity suppression
KW - azimuth ambiguities
KW - synthetic aperture radar (SAR)
UR - https://www.scopus.com/pages/publications/85003467564
U2 - 10.1109/LGRS.2016.2630122
DO - 10.1109/LGRS.2016.2630122
M3 - 文章
AN - SCOPUS:85003467564
SN - 1545-598X
VL - 14
SP - 102
EP - 106
JO - IEEE Geoscience and Remote Sensing Letters
JF - IEEE Geoscience and Remote Sensing Letters
IS - 1
M1 - 7778163
ER -