Improved Sar Scattered Wave Interference Method Based on Floating Platform
A floating platform, scattered wave technology, applied in the field of signal processing, can solve the problems of distortion of interference effect, small interference range, and no consideration of the influence of system parameter error, so as to reduce the distance distortion, overcome the short interference time, and achieve effective Overlay effect
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Embodiment 1
[0042] For SAR scattered wave interference, aiming at the range distortion and short interference distance caused by scattered wave interference in the prior art, the present invention designs an improved SAR scattered wave interference method based on floating platform, see figure 1 , the SAR scattered wave interference method of the present invention comprises the following steps:
[0043] Step 1: The jammer intercepts the radar signal
[0044] Based on the analysis of the interference image distortion and defocus problems existing in the prior art, the present invention adopts a technical solution of increasing the height of the jammer, specifically installing the jammer on a floating platform, and expanding the jamming signal by increasing the height Use the jammer installed on the floating platform to intercept the radar time-domain signal of the opponent, and obtain the radar time-domain signal data with the distance as the row vector and the azimuth as the column vector...
Embodiment 2
[0061] The improved SAR scattered wave interference method based on the floating platform is the same as that in Embodiment 1, combined below figure 1 with figure 2 , the improved SAR scattered wave interference method based on the floating platform of the present invention will be described in detail.
[0062] Step 1: Use the jammer installed on the floating platform to intercept the radar time domain signal
[0063] Use the jammer installed on the floating platform to intercept the radar time domain signal, and obtain the radar time domain signal data s with the distance as the row vector and the azimuth as the column vector J (t r ,t m ), where t r is the distance fast time, t m is the azimuth slow time.
[0064] Step 2: Use the sum of history differences to calculate the phase modulation coefficient, and perform phase modulation on the radar time domain signal
[0065] 2a) Use the jammer installed on the floating platform to detect and obtain the slant distance his...
Embodiment 3
[0083] The improved SAR scattered wave interference method based on the floating platform is the same as that in Embodiment 1-2, combined with the attached image 3 The simulation effect diagram of the present invention describes in detail the reduction of distortion and the generation of realistic scenes. In the method of increasing the distance position of the modulation center of the irradiation area described in step 2b), the present invention increases the distance position of the modulation center of the irradiation area , reducing the defocus and distance distortion of the interference scene, producing a more balanced interference scene, and improving the fidelity of the interference scene.
[0084] see image 3 , the ordinate indicates the position in the distance direction, and the abscissa indicates the position in the azimuth direction, and the unit is m. There are 9 scatterers in the target area, and every two scatterers are separated by 100 meters to form a 3×3 l...
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