| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a car-onboard radar device capable of acquiring the speed of a car without communication with the car.SOLUTION: The car-onboard radar device according to the present invention comprises: a transmission/reception unit for transmitting a transmitted wave while changing the frequency of a transmitted signal and generating a beat signal from a received signal obtained by receiving a reflected wave of the transmitted wave and the transmitted signal; a frequency analysis unit for generating a two-dimensional spectrum that includes a speed component and a distance component by applying a prescribed frequency analysis process to a signal series of the beat signal; and a speed specification unit for dividing the two-dimensional spectrum into a plurality of blocks regarding the speed component, and specifying the speed of the car on the basis of a threshold obtained by applying a Constant False Alarm Rate (CFAR) process to each of the plurality of blocks.</p> |
