Title :
An Algorithm for ISAR Ship Imaging Based on S-Distribution
Author :
Geng, Jun ; Li, Shaobin ; Yuan, Yeshu
Author_Institution :
Sch. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China
Abstract :
Under the sea wave, ship target experiences three-dimensional rotations and its echo Doppler frequency changes complexly. In order to improve the quality of ship image, a new algorithm based on S-distribution is proposed. The instantaneous ISAR image can be obtained by calculating the S-distribution of each range bin. In comparison with the classical time frequency distribution, S-distribution produces high concentration at the instantaneous frequency for arbitrary signals, its cross-term interference can be easily removed by recursive method, and its calculation is effective. The simulation results demonstrate the effectiveness of this imaging method.
Keywords :
Doppler effect; object detection; radar imaging; ships; synthetic aperture radar; target tracking; underwater equipment; 3D rotations; ISAR ship imaging; S-distribution; echo Doppler frequency; ship target; Angular velocity; Doppler radar; Image reconstruction; Image resolution; Interference; Marine vehicles; Radar imaging; Radar scattering; Signal resolution; Time frequency analysis;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5303653
