摘要
A grating lobes suppression method for chirp-subpulse stepped frequency（CSSF） signals is proposed, which is applied to deformation monitoring using the ground based synthetic aperture radar（GB-SAR） system. This method is based on accurate estimation and correction of the phase and amplitude error along two dimensions（range and azimuth）, i.e., the error estimation inside the subpulse（in-subpulse error） and across the stepped frequency subpulses（cross-subpulse error） of transmitted CSSF signals. Validated both with simulated data and experimental data recorded in the deformation monitoring campaign, it can be seen that the method as well as the relative conclusions can be fully and effectively applied to most of the stepped frequency systems.
A grating lobes suppression method for chirp-subpulse stepped frequency（CSSF） signals is proposed, which is applied to deformation monitoring using the ground based synthetic aperture radar（GB-SAR） system. This method is based on accurate estimation and correction of the phase and amplitude error along two dimensions（range and azimuth）, i.e., the error estimation inside the subpulse（in-subpulse error） and across the stepped frequency subpulses（cross-subpulse error） of transmitted CSSF signals. Validated both with simulated data and experimental data recorded in the deformation monitoring campaign, it can be seen that the method as well as the relative conclusions can be fully and effectively applied to most of the stepped frequency systems.
基金
supported by the National Natural Science Foundation of China(61120106004
61225005)
作者简介
Tao Zeng was born in 1971. He received his B.S. and Ph.D. degrees from the Beijing Institute of Technology （BIT）, Beijing, China, in 1994 and 1999, respectively. Since 1999, he has been with the teaching staff of the Beijing Institute of Technology. His research interests include SAR imag- ing technology and real-time radar signal processing. E-mail： zengtao@bit.edu.cnCong Mao was born in 1987. She received her B.S. degree in information and electronic engineering from Beijing Institute of Technology （BIT）, Beijing, China, in 2010. She has been working toward her Ph.D. degree in the Department of Electronic Engineering, BIT, since 2011, and was major in GB-SAR differential interferometry and SAR imaging technique. E-mail： 20060538@bit.edu.cnCorresponding author.Cheng Hu was born in 1981. He received his B.S. degree in electronic engineering from the National University of Defense Technology, Changsha, China, in 2003 and Ph.D. degree in target detection and recognition from the Beijing Institute of Technology, Beijing, China, in 2009. From March 2006 to June 2007, he was a research associate with the Microwave Integrate System Laboratory, University of Birmingham, Birmingham, U.K. Since 2012, he has been an associate professor with the School of Electronic Engineering, Beijing Institute of Technology. He has published around 20 journal papers and over 40 conference papers, and applied over 20 patents. His research interests include geosynchronous SAR imaging processing, bistatic SAR imaging processing, and forward scatter radar signal processing. E-mail： cchchb@gmail.comMao Zhu was born in 1988. He received his B.S. degree from Beijing Institute of Technology, Beijing, China, in 2010. Now he is the Ph.D. candidate in Beijing Institute of Technology and majored in bistatic SAR interferometry. E-mail： killerzmbit@ 163.comWeiming Tian was born in 1983. He received his B.S. and Ph.D. degrees from the Beijing Institute of Technology, Beijing, China, in 2005 and 2010, respectively. His research interests include SAR system and signal processing, bistatic SAR synchronization, high-resolution radar system, and real-time radar signal processing. E-mail： tianwei6779@ 163.comJingjing Ren was born in 1984. She received her Ph.D. degree in electromagnetic from University of Science and Technology of China （USTC） in 2012. Her research interests include large-scale image processing, SAR signal processing and system simulation. E-mail： 93004907@qq.com
