Patent ID: 11947034

Abstract:
A method for calibrating a receiving (Rx) channel of a frequency-modulated continuous-wave (FMCW) radar system includes: setting the Rx channel in calibration mode, where the Rx channel includes a mixer, a phase shifter coupled to a first input of the mixer, a filter coupled to an output of the mixer, and an analog-to-digital converter (ADC) coupled to an output of the filter; setting a value for a phase shifter control word of the phase shifter; sending a chirp signal to the phase shifter; sending a modulated chirp signal to a second input of the mixer, where an output signal at the output of the mixer includes a beat signal; and forming an amplitude curve based on data samples from the ADC, where the amplitude curve illustrates amplitudes of the beat signal at a plurality of frequencies within an operating frequency band of the FMCW radar system.