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

fYear

2009

fDate

26-30 Oct. 2009

Firstpage

926

Lastpage

930

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);

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APSAR.2009.5374313

Filename

5374313