Patent ID: 11156697

Abstract:
First voltage data (V11 to V1n) and second voltage data (V21 to V2n) each correspond to ranges of the same transmitted signals (T1 to Tn) that have different modulation center frequencies. A speed calculating unit (50) calculates a moving speed of a radio-wave-reflecting object by calculating a reference speed (Sref) which is based on a difference value between the modulation center frequency (Fc_1) of the range of the transmitted signals (T1 to Tn) corresponding to the first voltage data (V11 to V1n) and the modulation center frequency (Fc_2) of the range of the transmitted signals (T1 to Tn) corresponding to the second voltage data (V21 to V2n), and comparing a plurality of speed candidates (Scand[m]) with the reference speed (Sref).