Focusing of tandem bistatic SAR data using the chirp-scaling algorithm
نویسندگان
چکیده
Based on an exact analytical bistatic point target spectrum, an efficient chirp-scaling algorithm is proposed to correct the range cell migration of different range gates to the one of the reference range for tandem bistatic synthetic aperture radar data processing. The length of the baseline (baseline to range ratio) does not give a direct influence to the proposed algorithm, which can be applied to the processing of tandem bistatic data with a large baseline even when the baseline is equal to the range. No interpolation is needed during the entire processing, only fast Fourier transforms and phase multiplications are needed, which result in efficiency. The validity of the proposed algorithm has been verified by simulated experiments.
منابع مشابه
An efficient Non-Linear Chirp Scaling method of focusing bistatic SAR images
Bistatic SAR data processing parameters, unlike monostatic SAR data, are generally azimuth-variant. The Non-Linear Chirp Scaling (NLCS) algorithm introduced in this paper is able to handle the azimuth variance. It focuses a bistatic image by first introducing a bulk linear range cell migration correction followed by a chirp scaling process to equalize the azimuth chirp rates for all targets in ...
متن کاملBistatic SAR processing using Non-Linear Chirp Scaling
Non-Linear Chirp Scaling is an innovative way to focus bistatic SAR images and has been demonstrated to work on the configuration where the receiver is stationary and the transmitter imaging on broadside. This paper improves and extends the method to the configuration where both the receiver and the transmitter are imaging at a squint angle and moving in a parallel track with the same velocity....
متن کاملFocusing high-squint and large-baseline one-stationary bistatic SAR data using keystone transform and enhanced nonlinear chirp scaling based on an ellipse model
This paper deals with the imaging problem for one-stationary bistatic synthetic aperture radar (BiSAR) with highsquint, large-baseline configuration. In this bistatic configuration, accurate focusing of BiSAR data is a difficult issue due to the relatively large range cell migration (RCM), severe range-azimuth coupling, and inherent azimuthgeometric variance. To circumvent these issues, an enha...
متن کاملChirp-Scaling based True Amplitude Imaging for Synthetic Aperture Radar
The Chirp-Scaling Algorithm (CSA) is one of the most widely used synthetic aperture radar (SAR) image reconstruction method. However, its applicability is limited to straight flight trajectories and monostatic SAR. We present a new mathematical treatment of the CSA from the perspective of Fourier Integral Operators theory. Our treatment leads to a chirp-scaling-based true amplitude imaging algo...
متن کاملSliding Spotlight Bistatic Synthetic Aperture Radar Image Formation Algorithm Based on Direct-Path Signal Compensation
In fixed-receiver bistatic synthetic aperture radar (SAR), the spaceborne SAR is used as an illuminator. The direct-path signal and bistatic SAR raw data are sampled by the fixed-receiver which is placed on the top of a building or a hill. As the direct-path signal has high signal-to-noise ratio (SNR) advantage and almost the same synchronization error terms, it is used as the reference signal ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- EURASIP J. Adv. Sig. Proc.
دوره 2013 شماره
صفحات -
تاریخ انتشار 2013