Title :
A method of improving quality of calculated image for large rotating angle
Author :
Zhou, Jianjiang ; Zhu, Zhaoda ; Su, Yongze
Author_Institution :
Dept. of Electron. Eng., Nanjing Univ. of Aeronaut. & Astronaut., China
Abstract :
The present paper deals with the methods of modeling radar echo data of an object on a rotating platform with physical optics (PO) method in the case of large rotating angle. The echo data are directly calculated in Cartesian coordinate system of spatial frequency and processed with two-dimensional fast Fourier transform (2D-FFT) to obtain the image of the object. The quality of the resulting image is much better than images obtained using the data calculated in polar coordinate system and interpolated to the Cartesian coordinate distribution before performing 2D-FFT
Keywords :
anechoic chambers; fast Fourier transforms; microwave imaging; physical optics; radar cross-sections; radar imaging; Cartesian coordinate system; image quality; physical optics method; radar echo data; rotating angle; spatial frequency; two-dimensional fast Fourier transform; Anechoic chambers; Diffraction; Frequency; Magnetic analysis; Microwave imaging; Optical scattering; Optical surface waves; Physical optics; Radar imaging; Radar scattering;
Conference_Titel :
Aerospace and Electronics Conference, 1996. NAECON 1996., Proceedings of the IEEE 1996 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-3306-3
DOI :
10.1109/NAECON.1996.517737
