The Method of Adaptive Gaussian Decomposition Based Recognition and Extraction of Scattering Mechanisms
n the methods of Near-Field ISAR imaging based Near-Field Far-Field Transformation(NFFFT),all target scattering is assumed to occur at the location of the incident field excitation.Its obviously non-localized scattering phenomenon such as re-entrant cavity scattering and surface traveling waves cannot be effectively handled.The presented method could find out where the non-localized scattering phenomenon occurred and separate from the scattering signatures.Then we can emendate the non-localized scattering part and improve the NFFFT precision.We present a method for recognition and extraction of scattering mechanisms.Firstly,calculate the spectrogram of targets scattering echo by an adaptive time-frequency transformation method named Adaptive Gaussian Representation(AGR).Then separate the wide components and narrow components of the Gaussian functions from the echo.Making images by the two parts respectively,the local and non-local scattering mechanisms and where it happened can be recognized.Beside of the NFFFT using,the method we presented could also be used to recognize and extract scattering mechanisms in complex target,and can be used in stealth design,SAR/ISAR image processing,etc.
DBS NFFFT Scattering Mechanism
Xin-Yi He Guang-De Tong Wei Gao Xiao-Lin Mi Peng-Cheng Gao Yuan Zhang
Science and Technology on Electromagnetic Scattering Laboratory Shanghai,China
国际会议
杭州
英文
1-4
2018-12-03（万方平台首次上网日期，不代表论文的发表时间）