Compensation of Analog Imperfections In a Ka-band FMCW SAR
Conference: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
04/23/2012 - 04/26/2012 at Nuremberg, Germany
Proceedings: EUSAR 2012
Pages: 4Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
Avignon-Meseldzija, Emilie; Azarian, Sylvain; Lesturgie, Marc (Supélec, France)
Liu, Weixian; Feng, Hongchuan; Lu, Yilong (Temasek Laboratories, Nanyang Technological University, Singapore)
This paper deals with the compensation of analog imperfections in a Ka-Band FMCW SAR. Due to the presence of phase distortion in the up-conversion and down-conversion block, we demonstrate that the calibration of the VCO based on a reference beat signal is range-limited. We propose a post-processing method to compensate the residual sinusoidal nonlinearities of the VCO characteristic as well as the phase distortion coming from the upconversion and down-conversion block. Processing of SAR data acquisition demonstrates the efficiency of the method.