title: SAR Ground Moving Target Indication Based on Relative Residue of DPCA Processing.
abstract: For modern synthetic aperture radar (SAR), it has much more urgent demands on ground moving target indication (GMTI), which includes not only the point moving targets like cars, truck or tanks but also the distributed moving targets like river or ocean surfaces. Among the existing GMTI methods, displaced phase center antenna (DPCA) can effectively cancel the strong ground clutter and has been widely used. However, its detection performance is closely related to the target's signal-to-clutter ratio (SCR) as well as radial velocity, and it cannot effectively detect the weak large-sized river surfaces in strong ground clutter due to their low SCR caused by specular scattering. This paper proposes a novel method called relative residue of DPCA (RR-DPCA), which jointly utilizes the DPCA cancellation outputs and the multi-look images to improve the detection performance of weak river surfaces. Furthermore, based on the statistics analysis of the RR-DPCA outputs on the homogenous background, the cell average (CA) method can be well applied for subsequent constant false alarm rate (CFAR) detection. The proposed RR-DPCA method can well detect the point moving targets and distributed moving targets simultaneously. Finally, the results of both simulated and real data are provided to demonstrate the effectiveness of the proposed SAR/GMTI method.
authors.affiliation: Beijing Key Laboratory of Embedded Real-time Information Processing Technology, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China. xujia@bit.edu.cn.
authors.forename: Jia
authors.initials: J
authors.lastname: Xu
authors.affiliation: Beijing Key Laboratory of Embedded Real-time Information Processing Technology, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China. hzzhit@126.com.
authors.forename: Zuzhen
authors.initials: Z
authors.lastname: Huang
authors.affiliation: Beijing Key Laboratory of Embedded Real-time Information Processing Technology, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China. yanliang121@126.com.
authors.forename: Liang
authors.initials: L
authors.lastname: Yan
authors.affiliation: Beijing Key Laboratory of Embedded Real-time Information Processing Technology, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China. zhouxu@bit.edu.cn.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436, China. zhangfuru@comac.cc.
authors.forename: Furu
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Embedded Real-time Information Processing Technology, School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China. longteng@bit.edu.cn.
authors.forename: Teng
authors.initials: T
authors.lastname: Long
keywords: displace phase center antenna (DPCA); ground moving target; relative residue; river surface; synthetic aperture radar (SAR)