Title :
The study of SAR-ISAR ship imaging based on time-frequency analysis
Author :
Cai, Yanning ; Chong, Jinsong
Author_Institution :
Nat. Key Lab. of Microwave Imaging Technol., Beijing, China
Abstract :
When ship targets are imaged by airborne radar, both the motion of radar and the complex motion of targets are involved, which brings great difficulties to imaging process. This paper establishes the range-Doppler (RD) model for SAR-ISAR ship imaging on the condition that the range is very far and the time is short. Then the analysis of ship image when the target experiences rolling, pitching and yawing. The FFT method is replaced by time-frequency analysis to obtain the target image in range-Doppler domain. Several time-frequency methods including WVD, CWD and SPWVD are studied. The simulation proves the accuracy of RD model and the advantages of time-frequency analysis.
Keywords :
Doppler shift; airborne radar; fast Fourier transforms; radar imaging; ships; synthetic aperture radar; time-frequency analysis; FFT method; SAR-ISAR ship imaging; airborne radar; fast Fourier transforms; inverse synthetic aperture radar; range-Doppler model; ship image analysis; time-frequency analysis; Airborne radar; Azimuth; Bandwidth; High-resolution imaging; Image analysis; Marine vehicles; Microwave imaging; Radar imaging; Sea surface; Time frequency analysis; Airborne radar; imaging; range-Doppler; rotation; time-frequency analysis;
Conference_Titel :
Information, Computing and Telecommunication, 2009. YC-ICT '09. IEEE Youth Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5074-9
Electronic_ISBN :
978-1-4244-5076-3
DOI :
10.1109/YCICT.2009.5382402
