Step-Tune Method for Digital Automatic Gain Control System of SAR

Konferenz: EUSAR 2008 - 7th European Conference on Synthetic Aperture Radar
02.06.2008 - 05.06.2008 in Friedrichshafen, Germany

Tagungsband: EUSAR 2008

Seiten: 4Sprache: EnglischTyp: PDF

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Chen, Xi; Qi, Haiming (Graduate University of Chinese Academy of Sciences)
Deng, Yun-Kai; Zhang, Ping (Institute of Electronics, Chinese Academy of Sciences)

This paper studies the step-tune method used in Digital Automatic Gain Control (DAGC) system in depth, and presents an improved method named shift-step-tune which is bases on double-threshold step-tune. Subsequently, we derive the regions for gain stability and provide the criteria for both single-threshold and double-threshold step-tune method through statistic calculation and performance analysis. And then validate them by computer simulation and SAR data image.