Method for detecting a distance, a radar system and a computer program product

摘要

The invention relates to a method for detecting a distance between a radar system and a reflecting surface. The method comprises the steps of transmitting a frequency modulated continuous wave (FMCW) radar signal from the radar system and receiving a reflected FMCW radar signal being the transmitted signal that has been reflected by the reflecting surface. Further, the method comprises the steps of providing a beat signal having a frequency that is equal to the frequency difference between the transmitted signal and the received signal and determining harmonics of the beat signal. The method also comprises the step of using phase shift information of at least one of said harmonics for determining a distance between the radar system and the reflecting surface.

主权项

1. A method, comprising:
transmitting, using a signal generator and antenna of a radar system, a frequency modulated continuous wave (FMCW) radar signal from the radar system; receiving, by the radar system, a reflected FMCW radar signal corresponding to the transmitted FMCW radar signal that has been reflected by a reflecting surface; obtaining, using a mixer of the radar system, a beat signal having a frequency corresponding to a frequency difference between the transmitted FMCW radar signal and the reflected FMCW radar signal; determining harmonics of the beat signal by Fourier decomposition; and determining, by a processor of the radar system, a distance between the radar system and the reflecting surface using phase shift information of at least one of the harmonics, wherein determining the distance comprises determining a phase difference between a pair of the harmonics.