Patent ID: 11906650
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An object detection apparatus for detecting an object with radio waves, the object detection apparatus comprising:
a transmission unit configured to emit a radio wave as a transmission signal toward the object;
a reception unit configured to receive, through a plurality of receiving antennas, radio waves reflected by the object as reception signals, and to generate, for each reception signal received by the respective plurality of receiving antennas, based on the reception signals, an intermediate frequency signal, wherein the reception unit includes a reference receiving antenna and a measurement receiving antenna; and
an arithmetic unit configured to decide sampling times so as to suppress generation of a virtual image by a beam pattern obtained by synthesizing the respective intermediate frequency signals, and execute sampling on a first intermediate frequency signal generated from a reception signal received by the measurement receiving antenna and a second intermediate frequency signal generated from a reception signal received by the reference receiving antenna,
based on obtained sample values, normalize the intermediate frequency signal generated from the reception signal received by the measurement receiving antenna according to the intermediate frequency signal generated from the reception signal received by the reference receiving antenna, and generates a normalized intermediate frequency signal as the intermediate frequency signal for position detection, and
calculate an evaluation function that represents a position distribution of the object from the normalized intermediate frequency signal, and based on the evaluation function, detects the position and shape of the object.