Title :
SAR Doppler frequency rate estimation based on time-frequency rate distribution
Author :
Liu Xianhua ; Xiong Jintao ; Huang Yulin ; Wu Junjie ; Yang Jianyu ; Wang Pu
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Time-frequency rate distribution (TFRD) indicates the characteristics of instantaneous frequency rate (IFR) of a signal. This paper proposed a method based on time-frequency rate distribution to estimate Doppler frequency rate by analyzing the linear frequency-modulated (LFM) characteristics of synthetic aperture radar (SAR) echo in the azimuth direction. This method can be applied to low signal-to-noise ratio (SNR) situation with high estimation precision. Simulation and practical results show the effectiveness of the method.
Keywords :
Doppler radar; echo; synthetic aperture radar; time-frequency analysis; SAR Doppler frequency rate estimation; azimuth direction; estimation precision; instantaneous frequency rate; linear frequency-modulated; synthetic aperture radar echo; time-frequency rate distribution; Azimuth; Estimation error; Frequency estimation; Geometry; Image resolution; Parameter estimation; Phase estimation; Signal analysis; Synthetic aperture radar; Time frequency analysis; Doppler frequency rate estimation; Synthetic Aperture Radar (SAR); Time-Frequency Rate Distribution (TFRD);
Conference_Titel :
Synthetic Aperture Radar, 2009. APSAR 2009. 2nd Asian-Pacific Conference on
Conference_Location :
Xian, Shanxi
Print_ISBN :
978-1-4244-2731-4
Electronic_ISBN :
978-1-4244-2732-1
DOI :
10.1109/APSAR.2009.5374313
