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Journal of Electronic Imaging • Open Access

Radar coincidence imaging in the presence of target-motion-induced error
Author(s): Dongze Li; Xiang Li; Yongqiang Cheng; Yuliang Qin; Hongqiang Wang

Paper Abstract

Radar coincidence imaging (RCI) is a new instantaneous imaging technique that does not depend on Doppler frequency for resolution. Such an imaging method does not require target relative motion and has an imaging interval that is even shorter than a pulse width. The potential advantages in processing both the relatively stationary and maneuvering targets make RCI provide a supplementary imaging approach for the conventional range Doppler imaging methods. The simulation experiments have preliminarily demonstrated the feasibility of the RCI technique. However, further investigations show that the imaging error arises for moving targets, and moreover, it is particularly related to target scattering maps. The paper analyzes the target-motion-induced error and points out that three factors are involved: target velocity, target scattering map, and the time-space independence of detecting signals. The current image-reconstruction algorithms of RCI, which are based on the least-square (LS) principle, are found to be seriously sensitive to the motion-induced errors and will be limited in practical imaging scenarios. Accordingly, the compressive sensing (CS) recovery algorithm is employed, which can utilize sparsity restriction to diminish the effect of the motion-induced error on image reconstruction. Simulations are designed to illustrate the three factors of the target-motion-induced error. The imaging performance of the LS and the CS methods in RCI image recovery are compared as well.

Paper Details

Date Published: 1 April 2014
PDF: 15 pages
J. Electron. Imaging. 23(2) 023013 doi: 10.1117/1.JEI.23.2.023014
Published in: Journal of Electronic Imaging Volume 23, Issue 2
Show Author Affiliations
Dongze Li, National Univ. of Defense Technology (China)
Xiang Li, National Univ. of Defense Technology (China)
Yongqiang Cheng, Ctr. for Space Science and Applied Research (China)
Yuliang Qin, National Univ. of Defense Technology (China)
Hongqiang Wang, National Univ. of Defense Technology (China)

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