Title :
A novel high-resolution imaging method for ROSAR
Author :
Wei Wang ; Guisheng Liao ; Dong Li ; Ke Yang ; Qing Xu
Author_Institution :
Nat. Lab. of Radar Signal Process., Xidian Univ., Xi´an, China
Abstract :
To improve the azimuth resolution performance which depends on the reconstruction angle in rotating synthetic aperture radar (ROSAR) system, a novel curved orbit approximation method based on the resampling and rotation of the transmitted and received pulse position is proposed. The approximation errors are calculated via an extended Taylor expansion and are compensated in the raw data domain. Precise two-dimensional (2-D) spectrum is derived and high resolution image is formed using extended omega-K algorithm for large scene. Feasibility and resolution performance of the proposed method are validated through simulation results.
Keywords :
approximation theory; image reconstruction; image resolution; radar imaging; synthetic aperture radar; 2D spectrum; ROSAR system; approximation errors; azimuth resolution performance; curved orbit approximation method; extended Taylor expansion; extended omega-K algorithm; high-resolution imaging method; pulse position; raw data domain; reconstruction angle; resampling; rotating synthetic aperture radar system; two-dimensional spectrum; 2-D Spectrum; Curved Orbit Approximation; ROSAR Imaging; omega-K;
Conference_Titel :
Radar Conference 2013, IET International
Conference_Location :
Xi´an
Electronic_ISBN :
978-1-84919-603-1
DOI :
10.1049/cp.2013.0149
