Resolution and Micro-Doppler Effect in Bi-ISAR System (in English)
Deng Dong-hu*① Zhang Qun① Luo Ying① Li Song② Zhu Ren-fei①
①(Institute of Information and Navigation, Air Force Engineering University, Xi’an 710077, China) ②(Institute of Air and Missile Defense, Air Force Engineering University, Xi’an 710051, China)
Abstract Compared to the monostatic radar, bistatic radar has many special characteristics because of its spatial complexity. Bistatic Inverse Synthetic Aperture Radar (Bi-ISAR) can be employed as a radar imaging tool for obtaining non-cooperative target images. In this study, we first analyze the range and azimuth resolution of a Bi-ISAR system. To analyze this azimuth resolution and its spatial-variety characteristic, a definition called con-Doppler bandwidth is introduced, which helps overcome the difficulty of the target’s viewing angle diversity calculation. Then, a detailed investigation is conducted to study the micro-Doppler effect caused by the vibration and the rotation of the target in the Bi-ISAR system. By comparing the difference in the micro-Doppler effect between the Bi-ISAR system and the Mono-ISAR system, we modify the extended Hough transform to extract the real micro-motion features of the targets. Finally, we provide some simulation results to validate the theoretical derivation and to illustrate the effectiveness of the proposed method.
Supported by the National Natural Science Foundation of China (No. 61172169), and the National Natural Science Foundation for Young Scientist of China (No. 61201369, 61102109).
About author: Deng Dong-hu (1986-) was born in Henan, China. He received the M.S. degree in electrical engineering from the Institute of Telecommunication Engineering, Air Force Engineering University (AFEU), Xi’an, China, in 2009. He is currently working toward his Ph.D. degree in the Radar and Signal Processing Laboratory, Institute of Information & Navigation, AFEU. His research interests include signal processing in ISAR.E-mail: dengdonghu@163.com.
Zhang Qun (1964-) was born in Shaanxi, China. He received the M.S. degree in mathematics from Shaanxi Normal University, Xi’an, China, in 1988 and the Ph.D. degree in electrical engineering from Xidian University, Xi’an, in 2001. He was a Research Engineer from 2001 to 2003 and a Research Fellow from 2005 to 2006 with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore. He is currently a Professor with the Institute of Information & Navigation, Air Force Engineering University, Xi’an, and an Adjunct Professor with the Laboratory of Wave Scattering and Remote Sensing Information, Fudan University, Shanghai, China. He has authored more than 200 papers on journals and conference proceedings. His research interests include signal processing, clutter suppression, and its application in SAR and ISAR.
Luo Ying (1984-) was born in Hunan, China. He received the M.S. degree in electrical engineering, in 2008, from the Institute of Telecommunication Engi- neering, Air Force Engineering University (AFEU), Xi’an, China, where he is currently working toward the Ph.D. degree in electrical engineering. He is currently instructor with the Radar and Signal Processing Laboratory, Institute of Information & Navigation, AFEU. His research interests include signal processing and ATR in SAR and ISAR.
Cite this article:
Deng Dong-hu,Zhang Qun,Luo Ying et al. Resolution and Micro-Doppler Effect in Bi-ISAR System (in English)[J]. JOURNAL OF RADARS, 2013, 2(2): 152-167.
2013, Vol. 2 
