Patent ID: 9506944
Filing Date: 2016-11-29
CPC Classification: G01P,G01S

Claim Text:
1. A velocity determination apparatus for determining a velocity of an object, the velocity determination apparatus comprising: at least three radiation sources configured to emit radiation in at least three different frequency directions respectively; a Doppler frequency measuring unit configured to measure a Doppler frequency based on the radiation reflected in the at least three different frequency directions; a Doppler frequency calculation unit configured to determine whether the measured Doppler frequency in one frequency direction of the at least three different frequency directions is faulty based on a predetermined criterion, wherein when the measured Doppler frequency in the one frequency direction is faulty, the Doppler frequency calculation unit is further configured to calculate the Doppler frequency for the one frequency direction based on the Doppler frequencies measured for at least two further frequency directions of the at least three different frequency directions, such that the faulty Doppler frequency is replaced with the calculated Doppler frequency in the one frequency direction; and a velocity determination unit configured to determine a velocity of the object based on the calculated Doppler frequency and the measured Doppler frequencies for the at least two further frequency directions.