| 摘要 |
PROBLEM TO BE SOLVED: To suppress secular change of deviation of an amplitude and a phase between reception antennas for configuring an array antenna or deterioration of direction estimation performance caused by the secular change.SOLUTION: Each antenna system processing unit of a radar reception unit generates an array correlation signal for each arrival delay and each Doppler frequency of a reflection wave signal by correlation calculation between the reflection wave signal and a radar transmission signal. A stationary object candidate extraction unit extracts a plurality of array correlation signals corresponding to the candidates of the stationary object existing in a side direction of a mobile body, based on output of the plurality of antenna system processing units and the Doppler frequency of the reflection wave signal from the stationary object existing in the side direction of the mobile body. A reference signal detection unit outputs a reference signal in the side direction of the mobile body by using the array correlation signal having a high degree of coincidence out of the output of the stationary object candidate extraction unit. A correction value calculation unit calculates a correction value for correcting deviation between reception antennas for configuring the array antenna by using the output of the reference signal detection unit. |
