Phase error compensation device and method of radar, and radar device including the same

A phase error compensation method of a radar, including a first and a second transmission antennas and a plurality of reception antennas, comprising:

• determining, for each first distance from among a plurality of first distances between the radar and a moving target, a first phase error between a phase of a first reception signal and a phase of a second reception signal,
• wherein the plurality of first distances are defined as distances from the radar to the moving target as the moving target moves relative to the radar,
• the first and second reception signals are received by the plurality of reception antennas, and
• the first reception signal corresponds to a first transmission signal transmitted from the first transmission antenna and the second reception signal corresponding to a second transmission signal transmitted from the second transmission antenna;
• and
• generating and storing, based on the first phase error for the each first distance, a lookup table for compensating a phase of a target reception signal, the lookup table including phase compensation values corresponding to the each first distance.

A radar device comprising:

• an antenna unit including a transmission antenna unit with a first transmission antenna and a second transmission antenna, and a receiving antenna unit with a plurality of receiving antennas;
• a transceiver configured to control to transmit a transmission signal through the transmission antenna unit and receive a reception signal through the receiving antenna unit;
• a phase error compensation device configured to determine, for each first distance from among a plurality of first distances between the radar and a moving target, a first phase error between a phase of a first reception signal and a phase of a second reception signal,
• wherein the plurality of first distances are defined as distances from the radar to the moving target as the moving target moves relative to the radar,
• the first reception signal corresponds to a first transmission signal transmitted from the first transmission antenna and the second reception signal corresponds to a second transmission signal transmitted from the second transmission antenna, and
• wherein the phase error compensation device is further configured to generate and store, based on the first phase error for the each first distance, a lookup table for compensating a phase of a target reception signal, the lookup table including phase compensation values corresponding to the each first distance;
• and
• a signal processor configured to acquire target information by compensating the phase of the target reception signal based on the phase compensation values for the each first distance stored in the lookup table.