28 July 2016 Ground moving target indication of multichannel synthetic aperture radar based on statistics of the dominant-velocity image
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Abstract
A scheme is presented in this paper for ground moving target indication of multichannel synthetic aperture radar (SAR) systems. “Dominant-velocity” is chosen as a valuable metric to describe the velocity map of the observed scene and the “dominant-velocity image” (DVI) can be generated via the developed spatial spectral processing technique. The mean μ and the standard deviation σ of each dominant-velocity are estimated from its neighborhood. Two different methods are proposed to derive the detection threshold in the (μ,σ) plane: one is a nonparametric histogram approximation approach and the other is a parametric polynomial curve-fitting approach. The proposed ground moving target indication approach is a multistage one: the first stage implements the preliminary detection in the (μ,σ) plane and a clustering technique is utilized to indicate potential moving targets, while the second stage implements the fine detection via a velocity estimation method based on maximum signal-to-interference ratio for the tagged targets. Finally, the effectiveness of the proposed method is verified by both simulated and real airborne SAR data.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hongchao Zheng, Hongchao Zheng, Junfeng Wang, Junfeng Wang, Xingzhao Liu, Xingzhao Liu, } "Ground moving target indication of multichannel synthetic aperture radar based on statistics of the dominant-velocity image," Journal of Applied Remote Sensing 10(3), 036010 (28 July 2016). https://doi.org/10.1117/1.JRS.10.036010 . Submission:
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