SAR (synthetic aperture radar) direction ambiguity suppression method based on antenna main lobe dominance intensity constraint
An antenna main lobe and azimuth ambiguity technology, which is applied in radio wave reflection/re-radiation, radio wave measurement system, utilization of re-radiation, etc., can solve problems such as interference, affecting SAR image quality, and increasing difficulty of system optimization design. Suppresses the effect of azimuth blurring
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[0023] In order to explain the technical solutions and technical advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0024] The SAR image azimuth ambiguity suppression method based on the dominant strength constraint of the antenna main lobe of the present invention, the complete processing flow is as follows figure 1 Shown. The specific steps of the method include:
[0025] 1) Determine the dominant area of antenna main lobe energy
[0026] According to the antenna main lobe and side lobe energy distribution (such as figure 2 As shown), determine the dominant area of the antenna main lobe within the PRF range, that is, first search for the fuzzy-Doppler curve (such as image 3 As shown, the abscissa: ±PRF / 2; ordinate: the pole of the blur amplitude), and then use this pole as the starting point to expand the antenna main lobe...
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