RT Journal Article
A1 Tao Zeng
AD School of Information and Electronic, Beijing Institute of Technology, Beijing 100081, People's Republic of China
A1 Wenfu Yang
AD School of Information and Electronic, Beijing Institute of Technology, Beijing 100081, People's Republic of China
A1 Zegang Ding
AD School of Information and Electronic, Beijing Institute of Technology, Beijing 100081, People's Republic of China
A1 Luosi Liu
AD School of Information and Electronic, Beijing Institute of Technology, Beijing 100081, People's Republic of China

PB iet
T1 Advanced range migration algorithm for ultra-high resolution spaceborne synthetic aperture radar
JN IET Radar, Sonar & Navigation
VO 7
IS 7
SP 764
OP 772
AB To achieve ultra-high resolution images, processing algorithm of spaceborne synthetic aperture radar (SAR) faces significant challenges such as the curved orbit, the unneglectable propagation time and the space-variant effective velocity. In the light of imaging requirements of the ultra-high resolution spaceborne SAR, an advanced range migration algorithm (ARMA) is presented in this study. Firstly, a new slant range model is developed by incorporating straight orbit approximation with additional linear, cubic and quartic term. Subsequently, a two-dimensional spectrum is derived by making use of Fourier transform pairs and the approximate azimuth stationary point based on the new range model. Finally, a novel RMA is derived. In this algorithm, the accurate range cell migration correction (RCMC) is done through two steps: the effective velocity dependence RCMC and the bulk RCMC, and the range-variant azimuth filtering is accomplished. Simulations are carried out to verify our proposed algorithm, which indicate that ARMA can keep precise even the resolution is up to decimeter level.
K1 advanced range migration algorithm
K1 range cell migration correction
K1 approximate azimuth stationary point
K1 unneglectable propagation time
K1 linear term
K1 ARMA
K1 slant range model
K1 cubic term
K1 Fourier transform pairs
K1 quartic term
K1 space-variant effective velocity
K1 spaceborne SAR
K1 imaging requirements
K1 range-variant azimuth filtering
K1 ultra-high resolution image processing algorithm
K1 RCMC
K1 straight orbit approximation
K1 two-dimensional spectrum
K1 ultra-high resolution spaceborne synthetic aperture radar
DO https://doi.org/10.1049/iet-rsn.2012.0124
UL https://digital-library.theiet.org/;jsessionid=s86em0gpkt43.x-iet-live-01content/journals/10.1049/iet-rsn.2012.0124
LA English
SN 1751-8784
YR 2013
OL EN