Radar apparatus, method for transmitting radar signal, method for receiving radar signal, and radar signal generation 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 a radar signal;
• and
• performing a multiplexing transmission on the radar signal to which the phase rotation amount is applied, from a plurality of transmission antennas, wherein
• the plurality of transmission antennas includes a first transmission antenna for emitting a first polarized wave and a second transmission antenna for emitting a second polarized wave different from the first polarized wave,
• the combination in which at least one of the Doppler shift amount or the code sequence is different is associated with each of the plurality of transmission antennas, and
• a first pattern of the Doppler shift amount and the code sequence assigned for the first transmission antenna and a second pattern of the Doppler shift amount and the code sequence assigned for the second transmission antenna are different from each other.

A radar signal generation apparatus, comprising:

• phase rotation 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 a multiplexing transmission on the radar signal to which the phase rotation amount is applied, from a plurality of transmission antennas, wherein
• the plurality of transmission antennas includes a first transmission antenna for emitting a first polarized wave and a second transmission antenna for emitting a second polarized wave different from the first polarized wave,
• the combination in which at least one of the Doppler shift amount or the code sequence is different is associated with each of the plurality of transmission antennas, and
• a first pattern of the Doppler shift amount and the code sequence assigned for the first transmission antenna and a second pattern of the Doppler shift amount and the code sequence assigned for the second transmission antenna are different from each other.