Radar coincidence imaging in the presence of target-motion-induced error

Dongze Li; Xiang Li; Yongqiang Cheng; Yuliang Qin; Hongqiang Wang

doi:10.1117/1.JEI.23.2.023014

1 March 2014 Radar coincidence imaging in the presence of target-motion-induced error

Dongze Li, Xiang Li, Yongqiang Cheng, Yuliang Qin, Hongqiang Wang

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Journal of Electronic Imaging, Vol. 23, Issue 2, 023014 (March 2014). https://doi.org/10.1117/1.JEI.23.2.023014

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.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Dongze Li, Xiang Li, Yongqiang Cheng, Yuliang Qin, and Hongqiang Wang "Radar coincidence imaging in the presence of target-motion-induced error," Journal of Electronic Imaging 23(2), 023014 (1 March 2014). https://doi.org/10.1117/1.JEI.23.2.023014

Published: 1 March 2014

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