AN EXTENDED FREQUENCY SCALING ALGORITHM FOR HIGH SQUINT SPOTLIGHT AIRBORNE SAR
نویسندگان
چکیده
منابع مشابه
Nonlinear Frequency Scaling Algorithm for High Squint Spotlight SAR Data Processing
This paper presents a new approach for the squint-mode spotlight SAR imaging. Like the frequency scaling algorithm, this method starts with the received signal dechirped in range. According to the geometry for the squint mode, the reference range of the dechirping function is defined as the range between the scene center and the synthetic aperture center. In our work, the residual video phase i...
متن کاملGeneralized Nonlinear Chirp Scaling Algorithm for High-Resolution Highly Squint SAR Imaging
This paper presents a modified approach for high-resolution, highly squint synthetic aperture radar (SAR) data processing. Several nonlinear chirp scaling (NLCS) algorithms have been proposed to solve the azimuth variance of the frequency modulation rates that are caused by the linear range walk correction (LRWC). However, the azimuth depth of focusing (ADOF) is not handled well by these algori...
متن کاملGeneralized Chirp Scaling Combined with Baseband Azimuth Scaling Algorithm for Large Bandwidth Sliding Spotlight SAR Imaging
This paper presents an efficient and precise imaging algorithm for the large bandwidth sliding spotlight synthetic aperture radar (SAR). The existing sub-aperture processing method based on the baseband azimuth scaling (BAS) algorithm cannot cope with the high order phase coupling along the range and azimuth dimensions. This coupling problem causes defocusing along the range and azimuth dimensi...
متن کاملAn Extended Inverse Chirp-z Transform Al- Gorithm to Process High Squint Sar Data
This paper proposes an Extended Inverse Chirp-Z Transform (EICZT) algorithm to handle the high squint FMCW SAR data, where the conventional Inverse Chirp-Z Transform (ICZT) cannot work due to the failure in dealing with the range-variance of secondand higher-order range-azimuth coupling terms. A preprocessing operation is implemented in the azimuth-Doppler and range-time (Doppler-time) domain, ...
متن کاملAn Improved Range-Doppler Algorithm for SAR Imaging at High Squint Angles
An improved range-Doppler algorithm (RDA) is proposed to reconstruct images from synthetic aperture radar (SAR) data received at high squint angles. At a higher squint angle, a larger synthetic aperture is required to receive sufficient amount of data for image reconstruction, and the range migration also becomes more serious, which demands more computational load and larger memory size. The pr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress In Electromagnetics Research
سال: 2013
ISSN: 1559-8985
DOI: 10.2528/pier13010307