| 摘要 |
It is intended to make it possible to acquire a digital signal at an interval that is shorter than the sampling interval of an AD conversion circuit and to thereby increase the distance resolution of a radar device. Based on a pulse signal having a constant interval that is generated by and output from a pulse generator 101, a pulse transmission position adjuster 102 generates a transmission signal in which transmission positions are adjusted by shifting the timing of the pulse signal in units of a time adjustment amount ± that is shorter than a sampling interval of an AD converter 114 of a receiver. In doing so, the pulse transmission position adjuster 102 delays transmission positions of respective pulses of the pulse signal in units of the time adjustment amount ± in a pattern that ends when the transmission timing becomes equal to the timing of the original pulse signal. A distance detector 115 generates a reception signal through pseudo oversampling having an interval that is equal to the time adjustment amount ± according to transmission position information indicating the transmission positions of the respective pulses of the pulse signal on the basis of a digital signal generated by sampling a reception signal corresponding to the transmission signal with the AD converter 114. |
