Patent ID: 8471759

Claim:
A forward-looking 3D imaging radar, comprising: a transmitting unit which generates RF signals to be radiated for observing object in front of the radar; a transmitting antenna which radiates the RF signal generated by the transmitting unit; a receiving antenna which receives signals radiated from the transmitting antenna and reflected by the object in front of the radar; a receiving unit which mixes the signal received by the receiving antenna and the branched signal from the transmitting unit, and converts the signal to digital signal; and a signal processor which controls the operations of the transmitting unit and receiving unit, sends command to the transmitting unit to generate RF signals, receives the digitally converted signal from the receiving unit, compensates phase using a phase compensation value (φ comp ) calculated by the below formula using distance of motion of a vehicle measured by a tachometer installed on the vehicle, extracts phase information of the object in front of the radar, and generates 3D radar image by producing altitude information based on the principle of interferometer: ϕ comp = 2 ⁢ π × f c × 2 × v × T a c where (φ comp ) is the phase compensation value, f c is center frequency, v is velocity of the vehicle, c is velocity of light, and T a corresponds to T p (dwell time)+T d1 (time for preparing transmission of waveform through a second transmitting antenna).