An Imaging Method for Curved Synthetic Aperture Radar
A technology of synthetic aperture radar and imaging method, which is applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, radio wave measurement system, etc. It can improve the focusing effect, expand the overlapping range, and reduce the loss of energy.
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and simulation examples to prove the practicability of the present invention.
[0023] as attached figure 1 As shown, through the imaging method of a kind of curved synthetic aperture radar of the present invention, can input as the original echo of curved SAR, after imaging processing, obtain the two-dimensional image of curved SAR, concrete implementation steps are as follows:
[0024] Step 1: Perform distance preprocessing on the original echo: perform de-FM processing on the received signal to obtain the intermediate frequency signal s i (t,t), whose expression is:
[0025]
[0026] where R a (t) is the reference slope distance, △R(t)=R t (t)-R a (t), Tp is the signal pulse width, t is the fast time of the radar signal, t is the slow time of the radar signal, c is the speed of light, α is the frequency modulation slope of the radar signal, f c is the signal ...
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