TY - GEN
T1 - A PGA and Time Domain Correlation Based Synthetic Bandwidth Method for High Range Resolution SAR System
AU - Tang, Tao
AU - Cui, Lei
AU - Wang, Pengbo
AU - Chen, Jie
AU - Guo, Yanan
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Ultra-high spatial resolution is an important development direction of spaceborne synthetic aperture radar (SAR). The finer the resolution, the more details can be obtained from the image. The range resolution mainly depends on the transmit signal bandwidth. However, due to the limitation of the hardware system, the traditional technologies have difficulties in realizing the wide working bandwidth of the radar. Synthetic bandwidth technology is an effective approach to achieving high range resolution. In actual systems, due to differences in hardware and atmospheric transmission characteristics, there are errors in amplitude, phase, and time delay between the received subband signals. Based on the spaceborne SAR multi-subband system model, this paper analyzes the influence of various errors, and proposes a subband splicing method based on phase gradient autofocus (PGA) and time-domain correlation. The simulation results verify the effectiveness of the algorithm.
AB - Ultra-high spatial resolution is an important development direction of spaceborne synthetic aperture radar (SAR). The finer the resolution, the more details can be obtained from the image. The range resolution mainly depends on the transmit signal bandwidth. However, due to the limitation of the hardware system, the traditional technologies have difficulties in realizing the wide working bandwidth of the radar. Synthetic bandwidth technology is an effective approach to achieving high range resolution. In actual systems, due to differences in hardware and atmospheric transmission characteristics, there are errors in amplitude, phase, and time delay between the received subband signals. Based on the spaceborne SAR multi-subband system model, this paper analyzes the influence of various errors, and proposes a subband splicing method based on phase gradient autofocus (PGA) and time-domain correlation. The simulation results verify the effectiveness of the algorithm.
KW - error compensation
KW - multi-subband synthesis
KW - Synthetic aperture radar (SAR)
KW - ultra-high range resolution
UR - https://www.scopus.com/pages/publications/85140369037
U2 - 10.1109/IGARSS46834.2022.9883535
DO - 10.1109/IGARSS46834.2022.9883535
M3 - 会议稿件
AN - SCOPUS:85140369037
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 1316
EP - 1319
BT - IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2022
Y2 - 17 July 2022 through 22 July 2022
ER -