Radar apparatus, method for transmitting radar signal, and radar signal processing apparatus

A method for transmitting a radar signal, the method comprising:

• applying a phase rotation amount corresponding to a combination of a Doppler shift amount and a code sequence to the radar signal;
• and
• performing, from a plurality of transmission antennas, multiplexing transmission of the radar signal to which the phase rotation amount is applied,
• wherein
• the plurality of transmission antennas includes a first transmission antenna that forms a first beam and a second transmission antenna that forms a second beam different from the first beam,
• to each of the plurality of transmission antennas, the combination in which at least one of the Doppler shift amount or the code sequence is different is associated, and
• a first pattern of the Doppler shift amount and the code sequence that are assigned to the first transmission antenna is different from a second pattern of the Doppler shift amount and the code sequence that are assigned to the second transmission antenna.

A radar signal processing apparatus comprising:

• application circuitry, which, in operation, applies a phase rotation amount corresponding to a combination of a Doppler shift amount and a code sequence to a radar signal;
• and
• transmission circuitry, which, in operation, performs, from a plurality of transmission antennas, multiplexing transmission of the radar signal to which the phase rotation amount is applied,
• wherein
• the plurality of transmission antennas includes a first transmission antenna that forms a first beam and a second transmission antenna that forms a second beam different from the first beam,
• to each of the plurality of transmission antennas, the combination in which at least one of the Doppler shift amount or the code sequence is different is associated, and
• a first pattern of the Doppler shift amount and the code sequence that are assigned to the first transmission antenna is different from a second pattern of the Doppler shift amount and the code sequence that are assigned to the second transmission antenna.