FM-CW radar and method of generating FM-CW signal

A method of generating a frequency modulated continuous waves (FM-CW) signal transmitted from an FM-CW radar including:

• a high frequency circuit to include a voltage control oscillator generating a frequency-modulated high frequency signal;
• and a signal processing circuit to convert an analog signal generated by the high frequency circuit into a digital signal and detect at least a distance to a target and velocity of the target, wherein
• the signal processing circuit includes a look up table to store default modulation control data, and
• the FM-CW radar generates the FM-CW signal by executing processing including:
• a first step of applying a default chirp data as the modulation control data of the voltage control oscillator that is stored in the look up table, the default chirp data having a linear characteristic in a time-voltage plane defined by time and voltage axes;
• a second step of calculating an initial frequency value and an initial voltage value from a voltage-frequency characteristic manifested by the application of the default chirp;
• a third step of generating modulation control data of the voltage control oscillator corrected by using a result of the calculation in the second step, by fixing a voltage increment and varying a time increment;
• and
• a fourth step of updating data stored in the look up table by using the modulation control data generated in the third step.