Power transmission device, power supply system, and power supply method
AssigneeKabushiki Kaisha Toshiba
InventorsToshiya MITOMO, Kentaro TANIGUCHI
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Abstract
According to one embodiment, a power transmission device according to this embodiment includes: a receiver that receives a signal from a power receiving device via a plurality of antennas; a controller that detects a plurality of directions of arrival of the signal by performing direction-of-arrival estimation based on the received signal, and selects one of the directions of arrival; and a transmitter that performs transmission beamforming of a power signal with directivity toward the selected direction of arrival.
Claims15
A power transmission device comprising:
- a receiver configured to receive a signal from a power receiving device via a plurality of antennas;
- a controller configured to detect a plurality of directions of arrival of the signal by performing direction-of-arrival estimation based on the received signal and selects one of the plurality of directions of arrival;
- and
- a transmitter configured to perform transmission beamforming of a power signal with directivity toward the selected arrival direction.
A power transmission method comprising:
- receiving a signal from a power receiving device via a plurality of antennas;
- detecting a plurality of directions of arrival of the signal by performing direction-of-arrival estimation based on the received signal;
- selecting one of the plurality of directions of arrival;
- and
- performing transmission beamforming of a power signal with directivity toward the selected direction of arrival.
A power supply system comprising a power transmission device and a power receiving device, wherein:
- the power receiving device includes a receiving-side transmitter configured to transmit a signal to the power transmission device;
- the power transmission device includes:
- a receiver configured to receive the signal from the power receiving device via a plurality of antennas;
- a controller configured to detect a plurality of directions of arrival of the signal by performing direction-of-arrival estimation based on the received signal, and selects one of the plurality of directions of arrival;
- and
- a transmission-side transmitter configured to perform transmission beamforming of a power signal with directivity toward the selected direction of arrival;
- and
- the power receiving device includes:
- a receiver configured to receive the power signal from the power transmission device;
- and
- a battery configured to store power based on the power signal.
Dependencies are inferred from the claim text.