Patent ID: 11910282
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 2:
3. A roadside communication device connected to an array antenna, comprising:
processing circuitry
to combine radio waves received via multiple element antennas, which constitute the array antenna, from a first on-board unit and detect a receive strength of the combined radio waves;
to estimate an angle of arrival and a receive strength of a direct wave and an angle of arrival and a receive strength of a reflected wave, the direct wave and the reflected wave being included in one or more radio waves received via the multiple element antennas from one or more on-board units; and
to determine whether or not to enable communications with the first on-board unit, using the array antenna, on a basis of the detected receive strength, and the estimated angles of arrival and the estimated receive strengths of the direct and reflected waves of the one or more radio waves,
wherein if the detected receive strength exceeds a reference value, and if the estimated angle of arrival of either the direct wave or reflected wave of the radio wave shows an arrival from a communication area, then the processing circuitry determines that communications with the first on-board unit are enabled.