FREQUENCY MODULATED CONTINUOUS WAVE RADAR AND SYNTHETIC APERTURE RADAR

摘要

In a frequency modulated continuous wave radar received reflections are mixed down with the transmitted frequency modulated signal. A series of mixed down signals is obtained for successive frequency sweeps, said series defining a first time direction along each mixed down signal and a second time direction from one mixed down signal to another at corresponding time points along the first time direction. A phase correction is applied to the mixed series of mixed down signals, the phase correction for a first time value in the first time direction corresponding to the deviation at a scaled time value obtained by scaling the time value dependent on a frequency in the second time direction. A frequency dependent time scaling factor value is used that reduces smearing effect of a deviation from linear frequency modulation.