| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a radar device which can observe a target by high detection performance and with high accuracy even when a plurality of targets are present in an extensive range of short to long distances. <P>SOLUTION: The radar device is equipped with a transceiver 20 whereby sweep signals subjected to FMCW modulation is transmitted at least twice, an FFT unit 32 whereby sweep signals received in response to transmission from the transceiver are subjected to fast Fourier transforms, and an MRAV processing unit 35a whereby beat frequencies corresponding to each of the two rounds of sweeps by the transceiver are calculated on the basis of signals obtained by performing Fourier transforms in the FFT unit, whereby velocities are calculated on the basis of beat frequency differences and time differences that are calculated, and whereby distances are calculated on the basis of velocities and beat frequencies that are calculated, thereby making calculations of distances and velocities of a plurality of targets. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
