Key points are not available for this paper at this time.
The range and Doppler resolution and accuracy of an FMCW radar depends on accurate modulation or a method to correct for modulation error. Shown here is a technique for a linear modulated radar (saw-tooth or triangle modulation) where data from a calibration target is used to find the phase/frequency modulation error and corrects the baseband data in a so-called autofocus method. The work described here shows the derivation of phase error in the baseband radar signal as a function of time and range (delay). We describe the algorithm for finding the modulation error using a point target. Finally we give experimental results using a radar built for this purpose.
Theodore Grosch (Mon,) studied this question.