Texas Instruments Incorporated
DOPPLER PROCESSING IN FREQUENCY-MODULATED CONTINUOUS WAVE RADAR SYSTEMS USING DITHER

Abstract:

Systems and methods are provided for Doppler processing for frequency-modulated continuous wave (FMCW) radar systems. Range-gate data representing the position of an object within a region of interest is generated at a radar sensor. A first Doppler Fast Fourier Transform (Doppler-FFT) is performed on the range-gate data to provide a first set of Doppler-FFT data. A velocity associated with a signal amplitude that exceeds a noise floor is identified in the first set of Doppler-FFT data. A correction value for the range-gate data is determined from the identified velocity. The range-gate data is modified using the determined correction value to provide modified range-gate data. A second Doppler-FFT is performed on the modified range-gate data to provide a second set of Doppler-FFT data.