Radar Coincidence Imaging for Off-Grid Target Using Frequency-Hopping Waveforms
Joint Authors
Qin, Yu-Liang
Zhou, Xiaoli
Cheng, Yongqiang
Wang, Hongqiang
Chen, Haowen
Source
International Journal of Antennas and Propagation
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-05-05
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Radar coincidence imaging (RCI) is a high-resolution staring imaging technique without the limitation of the target relative motion.
To achieve better imaging performance, sparse reconstruction is commonly used.
While its performance is based on the assumption that the scatterers are located at the prediscretized grid-cell centers, otherwise, off-grid emerges and the performance of RCI degrades significantly.
In this paper, RCI using frequency-hopping (FH) waveforms is considered.
The off-grid effects are analyzed, and the corresponding constrained Cramér-Rao bound (CCRB) is derived based on the mean square error (MSE) of the “oracle” estimator.
For off-grid RCI, the process is composed of two stages: grid matching and off-grid error (OGE) calibration, where two-dimension (2D) band-excluded locally optimized orthogonal matching pursuit (BLOOMP) and alternating iteration minimization (AIM) algorithms are proposed, respectively.
Unlike traditional sparse recovery methods, BLOOMP realizes the recovery in the refinement grids by overwhelming the shortages of coherent dictionary and is robust to noise and OGE.
AIM calibration algorithm adaptively adjusts the OGE and, meanwhile, seeks the optimal target reconstruction result.
American Psychological Association (APA)
Zhou, Xiaoli& Wang, Hongqiang& Cheng, Yongqiang& Qin, Yu-Liang& Chen, Haowen. 2016. Radar Coincidence Imaging for Off-Grid Target Using Frequency-Hopping Waveforms. International Journal of Antennas and Propagation،Vol. 2016, no. 2016, pp.1-16.
https://search.emarefa.net/detail/BIM-1105322
Modern Language Association (MLA)
Zhou, Xiaoli…[et al.]. Radar Coincidence Imaging for Off-Grid Target Using Frequency-Hopping Waveforms. International Journal of Antennas and Propagation No. 2016 (2016), pp.1-16.
https://search.emarefa.net/detail/BIM-1105322
American Medical Association (AMA)
Zhou, Xiaoli& Wang, Hongqiang& Cheng, Yongqiang& Qin, Yu-Liang& Chen, Haowen. Radar Coincidence Imaging for Off-Grid Target Using Frequency-Hopping Waveforms. International Journal of Antennas and Propagation. 2016. Vol. 2016, no. 2016, pp.1-16.
https://search.emarefa.net/detail/BIM-1105322
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1105322