Device and method for processing radar signal, and radar system including the same

A radar system comprising:

• an antenna unit including a transmission antenna unit including a first transmission antenna and a second transmission antenna and a reception antenna unit including a plurality of reception antennas;
• a transceiver configured to transmit a transmission signal through the transmission antenna unit and receive a reception signal through the reception antenna unit;
• and
• one or more signal processors configured to estimate an angle of a target by processing the transmission signal and the reception signal,
• wherein the one or more signal processors are configured to:
• in a first period within one scan period, perform two fast Fourier transforms on a first signal, extract peaks from the first signal, on which the two fast Fourier transforms are performed, by performing digital beamforming or non-coherent integration and peak extraction, and determine a bin-rejection mask based on the peaks extracted from the first signal;
• and
• in a second period after the first period within the one scan period, perform the two fast Fourier transforms on a second signal different from the first signal, using the bin-rejection mask, extract peaks from the second signal, on which the two fast Fourier transforms are performed, by performing the digital beamforming or non-coherent integration and the peak extraction, determine a Doppler component of a target using the peaks extracted from the first signal and the second signal, determine a virtual channel vector based on the Doppler component of the target, and acquire information associated with the target based on the virtual channel vector.