Title :
Real-time implementation of an FMCW backprojection algorithm for 1D and 2D apertures
Author :
Haderer, Andreas ; Scherz, Philipp ; Schrattenecker, Jochen ; Stelzer, Andreas
Author_Institution :
Inst. for Commun. Eng. & RF-Syst., Johannes Kepler Univ. Linz, Linz, Austria
Abstract :
This paper addresses the real-time implementation of an image reconstruction algorithm applicable to synthetic aperture radar systems. We utilize a simple backprojection method to calculate an image from the signals, measured with a frequency-modulated continuous-wave (FMCW) radar. For this reason, the contribution from the instantaneous measurement to every pixel in the image domain is evaluated immediately after the data set is available. As the backprojection algorithm requires an interpolation scheme, the nearest-neighbor interpolation method is investigated regarding the achievable accuracy. Finally, we describe the algorithm´s implementation in a field programmable gate array and verify the realized design with simulated and measured FMCW radar signals.
Keywords :
CW radar; FM radar; field programmable gate arrays; image reconstruction; interpolation; radar imaging; synthetic aperture radar; 1D apertures; 2D apertures; FMCW backprojection algorithm; FPGA; SAR; field programmable gate array; frequency-modulated continuous-wave radar; image reconstruction algorithm; instantaneous measurement; nearest-neighbor interpolation method; real-time implementation; synthetic aperture radar systems; Antenna measurements; Apertures; Image reconstruction; Interpolation; Radar imaging; Signal processing algorithms;
Conference_Titel :
Radar Conference (EuRAD), 2011 European
Conference_Location :
Manchester
Print_ISBN :
978-1-4577-1156-5