| 摘要 |
PROBLEM TO BE SOLVED: To detect noise applied steadily to a beat signal in a method unlike conventional ones in an FMCW radar device.SOLUTION: An FMCW radar device transmits transmission signals having a first rise part Tbu in which frequency gradually rises at a first modulation inclination, a first drop part in which frequency gradually drops at a first modulation inclination, a second rise part Tau in which frequency gradually rises at a second modulation inclination different from the first modulation inclination, and a second drop part Tad in which frequency gradually drops at the second modulation inclination. The frequencies at peaks P1 to P8 are specified for the corresponding beat signals Tbu, Tbd, Tau, and Tad. Information that a power source bias circuit has an oscillation is given based on that, among groups formed by extracting one peak from each of Tbu, Tbd, Tau, and Tad, having the specified peaks P1 to P8 as subjects, there is the group (P5 to P8) all the peaks of which are in the same frequency range. |
