Abstract: Provided are an electric motor control device and an electric motor control method with high reliability capable of performing noise reduction control (or sensorless control) by superimposing a radio-frequency voltage and capable of performing compensation of a dead time of an inverter with a minimum necessary configuration.

Abstract: A power supply system includes a first power supply apparatus configured to perform power transmission by an electromagnetic wave having a first frequency band, and a second power supply apparatus configured to perform power transmission by an electromagnetic wave having a second frequency band. The first power supply apparatus and the second power supply apparatus are provided so as to be 2H×{tan(?)} or greater distant from each other, when each of the first power supply apparatus and the second power supply apparatus is provided in height H from a floor surface, where H is a positive number, and when a direction of a maximum value ±3 dB is in a range from ?? to +? in a case where a perpendicular downward direction from each position is a standard.

Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: According to one embodiment, a wireless communication device includes a communication unit and a processor. The processor determines whether a first wireless device is connected to the wireless communication device. When the processor determines connection of the first wireless device, the processor switches a reception frequency of the communication unit among frequencies, and restart periodic communication with the wireless devices after receiving an advertising signal transmitted from the first wireless device.

Abstract: According to one embodiment, a processing device includes a first layer, a second layer, a receiver unit configured to receive first data from the first layer, a processing unit configured to generate second data by changing the first data, and a transmitter unit configured to transmit the second data to the second layer. The first data includes a communication resource allocation request indicating a size of untransmitted. The processing unit is configured to generate the second data by changing the size of the untransmitted data.

Abstract: According to one embodiment, a processing device for a base station including a first layer and a second layer, includes a receiver unit configured to receive first data from the first layer, a processing unit configured to generate second data based on the first data, and a transmitter unit configured to transmit the second data to the second layer. The processing unit is configured to determine a transmission cycle of the first data based on a timing at which the first data is received and a plurality of transmission cycle candidates, and cause the transmitter unit to transmit the second data at a timing based on the transmission cycle of the first data.

Abstract: A power supply system includes a first power supply apparatus configured to perform power transmission by an electromagnetic wave having a first frequency band, and a second power supply apparatus configured to perform power transmission by an electromagnetic wave having a second frequency band. The first power supply apparatus and the second power supply apparatus are provided so as to be 2H×{tan(?)} or greater distant from each other, when each of the first power supply apparatus and the second power supply apparatus is provided in height H from a floor surface, where H is a positive number, and when a direction of a maximum value ±3 dB is in a range from ?? to +? in a case where a perpendicular downward direction from each position is a standard.

Abstract: A power supply system includes a first power supply apparatus and a second power supply apparatus. The second power supply apparatus includes a power transmission controller and a receiver. The power transmission controller transmits a power transmission signal for power supply. The receiver receives information on a wireless system to which neither the first power supply apparatus nor the second power supply apparatus belongs from the first power supply apparatus. The power transmission controller determines at least one of a transmission time at which the power transmission signal is transmitted, a transmission direction in which the power transmission signal is transmitted, a power level of the power transmission signal, or a frequency of the power transmission signal, using the information on the wireless system, and transmits the power transmission signal based on this determination.

Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: A power supply system includes a first power supply apparatus configured to perform power transmission by an electromagnetic wave having a first frequency band, and a second power supply apparatus configured to perform power transmission by an electromagnetic wave having a second frequency band. The first power supply apparatus and the second power supply apparatus are provided so as to be 2H×{tan(?)} or greater distant from each other, when each of the first power supply apparatus and the second power supply apparatus is provided in height H from a floor surface, where H is a positive number, and when a direction of a maximum value ±3 dB is in a range from ?? to +? in a case where a perpendicular downward direction from each position is a standard.

Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first field containing information to identify a plurality of wireless communication terminals, and configured to multiplex and transmit a plurality of second fields in each of which a first frame containing an address of any of the wireless communication terminals is set; and a controller configured to determine, for the first frames, values pertaining to lengths of durations to suppress access to a wireless medium to the wireless communication terminal having an address different from the address contained in each of the first frames. The transmitter is configured to set the values in the first frames, the second fields, or the first field. The controller is configured to determine the values so that the durations have an end at an identical time.

Abstract: According to one embodiment, an wireless power transmission apparatus includes a plurality of antennas, a power transmission circuit, a measuring circuit and a control circuit. The power transmission circuit is configured to transmit a beam of a first wireless signal from the plurality of antennas. The measuring circuit is configured to receive a second wireless signal with the plurality of antennas. The control circuit is configured to: detect an object in a direction of the beam based on the second wireless signal received at a plurality of timings; and change a shape of the beam by controlling at least either an amplitude or a phase of the first wireless signal provided to each antenna of the plurality of antennas.

Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: A power supply system includes a first power supply apparatus configured to perform power transmission by an electromagnetic wave having a first frequency band, and a second power supply apparatus configured to perform power transmission by an electromagnetic wave having a second frequency band. The first power supply apparatus and the second power supply apparatus are provided so as to be 2H×{tan(?)} or greater distant from each other, when each of the first power supply apparatus and the second power supply apparatus is provided in height H from a floor surface, where H is a positive number, and when a direction of a maximum value ±3 dB is in a range from ?? to +? in a case where a perpendicular downward direction from each position is a standard.

Abstract: According to one embodiment, a wireless communication device, includes a receiver configured to receive a first field, receive at least one of a plurality of second fields having been multiplexed and transmitted, and decode the one of the second fields to obtain a frame in a case where first information identifying the wireless communication device is not set in the first field, and a controller configured to suppress access to a wireless medium during a period indicated by a value set in the frame.

Abstract: According to one embodiment, an electronic apparatus includes power transmission circuitry, and detection circuitry. The power transmission circuitry transmits power by an electromagnetic wave with a first frequency band. The detection circuitry receives a reception signal and performs carrier sense with a second frequency band different from the first frequency band. The detection circuitry includes interference avoidance circuitry that eliminates a signal having a third frequency band which is a part of the second frequency band from the reception signal.

Abstract: According to one embodiment, an electronic apparatus for feeding power to an electronic device by an electromagnetic wave in a first frequency band, includes a receiver and a transmitter. The receiver receives a beacon from the electronic device via at least a part of the first frequency band. The beacon includes an unmodulated signal at least partly. The transmitter transmits a first electromagnetic wave for feeding power to the electronic device via the first frequency band based on the beacon. A time length of the beacon is different from a time length of the first electromagnetic wave.

Abstract: According to one embodiment, an electronic device includes processor circuitry. The processor circuitry is configured to control detection module to execute a first carrier sense by performing at least one of phase control and amplitude control corresponding to a first beam pattern for a received wireless signal, and execute a second carrier sense by performing at least one of phase control and amplitude control corresponding to a second beam pattern for the received wireless signal, and supply power by an electromagnetic wave with the first beam pattern based on a result of the first carrier sense, and control power supply module to supply power by an electromagnetic wave with the second beam pattern based on a result of the second carrier sense.

Abstract: According to one embodiment, a power supply apparatus includes a power transmission controller and a receiver. The power transmission controller transmits a first power transmission signal for power supply. The receiver receives first information on a second power transmission signal from a first power supply apparatus. The second power transmission signal is transmitted by the first power supply apparatus for power supply. The power transmission controller determines at least one of a first time at which the first power transmission signal is transmitted, a first direction in which the first power transmission signal is transmitted, or a first power level of the first power transmission signal, using the first information.