Radar device, radar control method, and non-transitory computer readable medium

A radar control method comprising:

• first transmitting, in each transmission cycle, signal sets, each of the signal sets including at least one chirp signal whose frequency varies over time;
• second transmitting the signal sets such that, for each signal set, a center frequency of the chirp signal monotonically changes and a time interval between the signal sets linearly varies over time;
• and
• acquiring reception data of a reflected signal, the reflected signal being the chirp signal that has been reflected by a target in an external environment, wherein
• a relative rate of change in the center frequency with respect to a reference frequency is a frequency rate of change,
• a relative rate of change in the time interval with respect to a reference interval is a time rate of change,
• a relative rate of change in the time rate of change with respect to the frequency rate of change is a ratio change rate, and
• the second transmitting includes adjusting the center frequency for each signal set so that the ratio change rate is within an allowable range during a specific time period.

A non-transitory computer readable medium storing a computer program product comprising instructions configured to, when executed by at least one of (i) a circuit and (ii) a processor, cause the at least one of the circuit and the processor to:

• implement, in each transmission cycle, a first transmission of signal sets, each of the signal sets including at least one chirp signal whose frequency varies over time;
• implement a second transmission of the signal sets such that, for each signal set, a center frequency of the chirp signal monotonically changes, and a time interval between the signal sets linearly varies over time;
• and
• acquire reception data of a reflected signal, the reflected signal being the chirp signal that has been reflected by a target in an external environment, wherein
• a relative rate of change in the center frequency with respect to a reference frequency is a frequency rate of change,
• a relative rate of change in the time interval with respect to a reference interval is a time rate of change,
• a relative rate of change in the time rate of change with respect to the frequency rate of change is a ratio change rate, and
• the second transmission includes adjusting the center frequency for each signal set so that the ratio change rate is within an allowable range during a specific time period.