Efficient detection of ground moving targets in FMCW SAR by focusing

Cheng, Pu; Xin, Qin; Wan, Jianwei; Zhan, Wei

doi:10.1109/igarss.2015.7326487

Cited by 3 publications

(3 citation statements)

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“…We call it relative velocity factor. The expression ( 4) is the same with the broadside mode [8]. The coordinates ( , )…”

Section: Improved Relative Range Equationmentioning

confidence: 99%

“…The moving target will be ultimately refocused at this position. The expression of the refocused position is different from the broadside mode [8]. It can be seen from ( 3) that the variable s y denotes the minimum relative slant range.…”

Section: Improved Relative Range Equationmentioning

confidence: 99%

“…First of all, the range history of the moving targets should be exactly modeled. For side looking SAR, a relative exact range equation has been derived [8]. Here, we extend the relative range equation model to squint-mode.…”

Section: Introductionmentioning

confidence: 99%

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Improved Relative Range Equation in Squint SAR for Moving Targets Refocusing

Cheng¹

2021

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Moving target detection is difficult for synthetic aperture radar (SAR). As SAR is designed for imaging of stationary ground scene, the moving targets would be blurred and displaced in conventional SAR imaging. To increase the signal clutter ratio, the moving targets should be refocused while detecting. Based on relative range equation, one can refocus and detect the moving targets simultaneously by searching the relative velocity. This method has been derived and applied for side looking SAR. In this paper, we extend the relative range equation to squint mode. The procedures of the refocusing method are also illustrated. By introducing a parameter of relative squint angle, the imaging position of the moving target is derived. The refocusing method is validated by simulations. The moving target can be optimally refocused, and the refocused position can be parametrized by the relative motion parameters.

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“…We call it relative velocity factor. The expression ( 4) is the same with the broadside mode [8]. The coordinates ( , )…”

Section: Improved Relative Range Equationmentioning

confidence: 99%

Section: Improved Relative Range Equationmentioning

confidence: 99%