A Super-Resolution Method for Synthetic Aperture Radar Oversampled Data Processing
A technology of synthetic aperture radar and data processing, which is applied in the direction of utilizing re-radiation, radio wave reflection/re-radiation, measuring devices, etc. It can solve the problems that super-resolution SAR images cannot be obtained, and achieve fine size and improved resolution. Effect
Active Publication Date: 2016-04-20
BEIHANG UNIV
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This method fuses four reference equations with azimuth and distance time domain information, which solves the defect that the traditional ChirpScaling algorithm cannot achieve super-resolution SAR image acquisition
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[0299] The realizable super-resolution method for synthetic aperture radar imaging processing invented by this design is used for simulation, and its parameter settings are as follows in Table 1:
[0300] Table 1 Imaging parameter settings
[0301]
[0302] Figure 4 and Figure 6 It is the result of imaging processing of lattice targets using the traditional classic ChirpScaling algorithm (see the first edition of "Synthetic Aperture Radar Satellite" published in February 2001, edited by Wei Zhongquan et al.). The traditional ChirpScaling algorithm is a classic method of SAR imaging processing based on the principle of matched filtering, so it is representative without loss of generality.
[0303] Figure 5 and Figure 7 It is the super-resolution imaging processing result of the super-resolution imaging of the lattice target for the synthetic aperture radar oversampling data of the present invention.
[0304] By comparing the imaging results, that is Figure 4 and ...
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The invention discloses a super-resolution method for oversampling data processing of synthetic aperture radar. The super-resolution method for oversampling data processing of the synthetic aperture radar is used for obtaining of a super-resolution SAR image. The super-resolution method comprises the first step of orientation-direction Fourier transformation of a two-dimension echo signal, the second step of complement migration correction, the third step of distance-direction Fourier transformation, the fourth step of identical migration correction and distance compression, the fifth step of distance-direction Fourier inversion, the sixth step of additional-phase correction, the seventh step of orientation-direction Fourier inversion, and the eighth step of orientation compression of a fusion inversion matrix. Compared with conversional imaging processing methods such as a matched filtering method, the super-resolution method for oversampling data processing of the synthetic aperture radar has the advantages that energy of an imaging result is more intensive, the spatial resolution is remarkably improved, and the purpose of the super resolution is achieved. Compared with a SAR data processing method completely based on a matrix, the super-resolution method for oversampling data processing of the synthetic aperture radar has the advantage that due to the combination with an efficient traditional imaging algorithm, the processing efficiency is remarkably improved.
Description
technical field [0001] The present invention relates to a SAR signal processing method of synthetic aperture radar, more particularly, refers to a super-resolution method for processing over-sampled data of synthetic aperture radar. Background technique [0002] Spaceborne SAR (Synthetic Aperture Radar, Synthetic Aperture Radar) is an imaging system with all-weather and all-weather capabilities. It is not restricted by natural conditions such as clouds, rain, fog, and night. Wide application value. The simulation of the original echo signal of spaceborne SAR system is of great significance to the design of SAR system and the research of imaging algorithm. [0003] "Radar Imaging Technology", published by Harbin Institute of Technology Press and edited by Liu Yongtan in October 1999, pointed out that synthetic aperture radar (SAR, Synthetic Aperture Radar) is installed on a motion platform, and transmits and receives pulses according to a certain repetition frequency to form...
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IPC IPC(8): G01S13/90
CPCG01S7/41G01S13/90G01S13/9011
Inventor 于泽吴有明肖鹏李春升
Owner BEIHANG UNIV