Patent ID: 11933907
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A method of acquiring the intensity difference table used in a direction detection device for detecting a received-wave arrival direction of a received wave, the direction detection device comprising a plurality of antennas for receiving the received wave; an intensity difference imparting unit to impart different intensity differences depending on the received-wave arrival direction to intensities of the received wave to be received at the antennas; a storage unit to store an intensity difference table in which an intensity difference between two of the antennas is associated with the received-wave arrival direction, for each combination of any two of the antennas; a detector to detect the intensity difference between the two antennas of the received wave to be received at the antennas; an extractor to extract, from the intensity difference table stored in the storage unit, a plurality of received-wave arrival directions corresponding to the intensity difference detected by the detector, for each combination of any two of the antennas; and a comparator to compare the received-wave arrival directions extracted by the extractor between the combinations of the antennas to acquire a matched received-wave arrival direction as a detection result, the method comprising:
setting up a radio wave source for generating the received wave so that the received wave is in a predetermined arrival direction with respect to the plurality of antennas;
causing the radio wave source to generate the received wave;
receiving the received wave by the antennas; and
acquiring the intensity difference table in which an intensity difference of the received wave between two of the antennas is associated with a received-wave arrival direction.