Vehicle-mounted radar device

摘要

Provided is a vehicle-mounted radar device capable of obtaining a high azimuth resolution with a simple configuration.;The vehicle-mounted radar device is mounted on a vehicle, and includes: a detector for irradiating a periphery of the vehicle with electromagnetic waves, and for outputting a reception signal obtained from reflected waves that are reflected from an object that exists in the periphery of the vehicle; a vehicle information calculator for calculating information related to a movement of the vehicle with a use of vehicle information of the vehicle; a storage unit for storing a plurality of the reception signals outputted by the detector at different time points; and a synthetic aperture processor for conducting a synthetic aperture processing on the reception signals obtained by the vehicle at different positions, based on the information related to the movement of the vehicle.

主权项

1. A radar device mounted on a vehicle, the radar device comprising:
a radar processing unit for radiating electromagnetic waves, and for outputting a reception signal obtained from reflected waves that are reflected from an object that exists in a periphery of the vehicle; a vehicle information calculator for calculating information related to a movement of the vehicle with a use of vehicle information related to a traveling state of the vehicle; a storage unit for storing a plurality of the reception signals outputted by the radar processing unit at a plurality of positions of the vehicle, respectively, which change according to the movement of the vehicle; and a synthetic aperture processor for conducting a synthetic aperture processing on the plurality of the reception signals obtained at the plurality of positions, respectively, which change according to the movement of the vehicle, based on the information related to the movement of the vehicle, wherein the vehicle information calculator calculates, with a use of the vehicle, information indicating positions where the plurality of the reception signals are respectively obtained, as the information related to the movement of the vehicle, and the vehicle information calculator further calculates a time interval between a time point of obtainment of a preceding reception signal and a time point of obtainment of a current reception signal, based on time information obtained for the reception signals, the storage unit stores, for each of the plurality of the reception signals, the reception signal together with the time interval between the time point of obtainment of the preceding reception signal and the time point of obtainment of the current reception signal and the information indicating the positions where the reception signal is obtained, and the synthetic aperture processor conducts synthetic aperture processing on the reception signals, based on the plurality of the positions where the plurality of the reception signals are obtained and on the time interval between the time point of obtainment of the preceding reception signal and the time point of obtainment of the current reception signal obtained at the plurality of the positions.