Original echo generation method for airborne Interference synthetic aperture radar

Abstract

The invention relates to a method for generating a machine carried interference synthetic aperture radar (InSAR) original echo wave. The method comprises: step 1: implementing position method of Fourier transformation (FFT) on equivalent back scattering coefficientª†1ú¼2(xú¼ª†), and then multiplying a phase function with defocus item and reducing and enlarging factor P1ú¢exp{j(ªš2 / alphaª†0ú®ª†ú½j[ª©1,2(ªš) / 4B]ª†2}; stp2: implementing distance FFT on the result form step 1, then multiplying a phase function with reducing and enlarging factor P2ú¢exp{j(1-ª©1,2(ªš)) / ª©1,2(ªš)BªÃ}; step 3: implementing distance inverse FFT on the result from the step 2, then multiplying a phase function with reducing and enlarging factor P3ú¢exp{-Jú¿1 / 4Bú®ª†2}; step 4: implementing distance inverse FFT on the result from the step 3, then multiplying a phase function with space constant exciting response function, distance horizontal shift factor and the reducing and enlarging factor P4ú¢Gú¿ªšú¼ªÃú¼ª†0ú®exp{-jªÃª†s1,2ú½j[ª©1,2(ªš)-1]BªÃ2}; step 5: implementing two dimensional inverse FFT on the result from step 4 and getting the needed original echo wave data h1ú¼2(xíõú¼ríõ).

Description

technical field The invention relates to the technical field of information acquisition and processing, in particular to an airborne interferometric synthetic aperture radar (InSAR) original echo generation method. Background technique In the process of developing the InSAR (Interferometric Synthetic Aperture Radar) system, in order to analyze and design the corresponding InSAR processing method before obtaining the radar data, it is necessary to use computer simulation to generate various InSAR data required for processing. Many foreign research laboratories have designed a series of InSAR simulation systems for this purpose. According to the classification methods in the literature, these InSAR simulation methods can be roughly classified into three categories, namely, coherent system simulation method, non-correlated image simulation method and SAR image-based simulation method. simulation method. In order to study a new InSAR imaging processing method that can be comb...

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Problems solved by technology

However, because it does not take into account the deviation of the radar from the reference track and the mismatch of the two single-view images when generating the original echo data, it cannot meet the requirements of the research on the new InSAR imaging processing method

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