TY - GEN
T1 - A METHOD OF MOVING SHIP IMAGING AND VELOCITY ESTIMATION WITH AIRBORNE SAR
AU - Wei, Jin
AU - Zhang, Yun
AU - Jiang, Yicheng
AU - Zhu, Xin
N1 - Publisher Copyright:
© 2021 IEEE
PY - 2021
Y1 - 2021
N2 - This paper mainly studies the airborne SAR imaging of moving ship under low sea state, and proposes a method to estimate ship velocity and achieve focused imaging. Moving ships may cause range migration, Doppler frequency shift and chirp rate changes in slow-time dimension, which make image defocused. A refocusing method is proposed based on correlation Doppler estimator, Second Order Keystone Transform (SOKT) and integrated cubic phase function (ICPF) to deal with these problems. First, linear range walk and linear phase are compensated with correlation Doppler estimator. Then, range curvature and quadratic phase are eliminated with SOKT and ICPF, respectively. With these estimated parameters, we can solve the velocity of the ship and obtain the focused image. The processing results of simulation and real data both verify the algorithm.
AB - This paper mainly studies the airborne SAR imaging of moving ship under low sea state, and proposes a method to estimate ship velocity and achieve focused imaging. Moving ships may cause range migration, Doppler frequency shift and chirp rate changes in slow-time dimension, which make image defocused. A refocusing method is proposed based on correlation Doppler estimator, Second Order Keystone Transform (SOKT) and integrated cubic phase function (ICPF) to deal with these problems. First, linear range walk and linear phase are compensated with correlation Doppler estimator. Then, range curvature and quadratic phase are eliminated with SOKT and ICPF, respectively. With these estimated parameters, we can solve the velocity of the ship and obtain the focused image. The processing results of simulation and real data both verify the algorithm.
KW - integrated cubic phase function (ICPF)
KW - moving ship
KW - Second Order Keystone Transform (SOKT)
KW - synthetic aperture radar (SAR)
UR - https://www.scopus.com/pages/publications/85129836526
U2 - 10.1109/IGARSS47720.2021.9554053
DO - 10.1109/IGARSS47720.2021.9554053
M3 - 会议稿件
AN - SCOPUS:85129836526
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 4592
EP - 4595
BT - IGARSS 2021 - 2021 IEEE International Geoscience and Remote Sensing Symposium, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021
Y2 - 12 July 2021 through 16 July 2021
ER -