Title :
Estimating the Doppler frequency rate for spaceborne SAR data with a new approach
Author :
Tie-fei, Zang ; Teng, Long ; Nan, RUN ; Xian-feng, Liu
Author_Institution :
Radar Res. Lab., Beijing Inst. of Technol., China
Abstract :
The paper presents a new method to estimate the spaceborne SAR Doppler frequency rate. A polynomial model is set up to demonstrate the azimuth signal of the spaceborne SAR and converts frequency rate estimation to frequency estimation through difference processing. With the analysis of estimation accuracy and computational complexity, the method is proved to be able to reduce the burden of computation while the estimation accuracy is guaranteed. Finally, several simulations and processing of RADARSAT raw data are presented, which proves the validity of the proposed method
Keywords :
Doppler radar; fast Fourier transforms; frequency estimation; radar imaging; radar signal processing; spaceborne radar; synthetic aperture radar; Doppler frequency rate estimation; Doppler parameters; FFT computations; RADARSAT raw data; azimuth signals; computational burden; computational complexity; difference processing; estimation accuracy; polynomial model; processing simulation; real time processing; spaceborne SAR; synthetic aperture radar; Azimuth; Earth; Equations; Frequency conversion; Frequency estimation; Polynomials; Pulse compression methods; Radar signal processing; Satellites; Spaceborne radar;
Conference_Titel :
Radar, 2001 CIE International Conference on, Proceedings
Conference_Location :
Beijing
Print_ISBN :
0-7803-7000-7
DOI :
10.1109/ICR.2001.984796
