Patent ID: 9310476
Filing Date: 2016-04-12
CPC Classification: F42C,G01S

Claim Text:
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.