Shape estimation system, object detection system, communication system, shape estimation method, object detection method, and communication method

A shape estimation system for a vehicle, the system comprising:

• a storage unit that stores, as detection data, the distance between the vehicle and a detected object, and an amplitude value/intensity value of a wave corresponding to the distance, the distance being acquired on a basis of the time from when a transmission wave is transmitted from a transmission unit which transmits the transmission wave to a detection area to be observed to when the wave is received by a reception unit which receives the wave scattered/reflected from the detected object present in the detection area;
• a resampling unit that resamples, on a basis of the detection data, an amplitude value/intensity value of the wave corresponding to the distance between the vehicle and the detected object as sampling data of a desired distance;
• a conversion processing unit that converts the resampling data which is output from the resampling unit from a spatial domain into a spatial frequency domain;
• a saving unit that saves a set of spectra in the spatial frequency domain for a plurality of preset object shapes as a database in association with the object shape;
• and
• a shape estimation unit that estimates the shape of the detected object on a basis of the spectrum of the detected object output from the conversion processing unit and the set of spectra saved in the saving unit,
• wherein the shape estimation unit estimates, as the shape of the detected object, the object shape corresponding to the spectrum, among the set of spectra in the saving unit, which is closest to the spectrum of the detected object output from the conversion processing unit.