Abstract: A wireless communication device includes an antenna and is used for storage as an electrical conductive body. The antenna includes a first conductor and a second conductor, one or more third conductors, a fourth conductor, and a feeding line. The first conductor and the second conductor face each other in a first axis. The one or more third conductors are located between the first conductor and the second conductor and extend in the first axis. The fourth conductor is connected to the first conductor and the second conductor and extends in the first axis. The feeding line is connected to any one of the third conductors. The first conductor and the second conductor are capacitively coupled to each other via the third conductor. The fourth conductor faces a conductor part of the storage.

Abstract: A wireless communication device includes an antenna and is used for storage as an electrical conductive body. The antenna includes a first conductor and a second conductor, one or more third conductors, a fourth conductor, and a feeding line. The first conductor and the second conductor face each other in a first axis. The one or more third conductors are located between the first conductor and the second conductor and extend in the first axis. The fourth conductor is connected to the first conductor and the second conductor and extends in the first axis. The feeding line is connected to any one of the third conductors. The first conductor and the second conductor are capacitively coupled to each other via the third conductor. The fourth conductor faces a conductor part of the storage.

Abstract: An information processing apparatus includes a communication interface and a controller. The communication interface receives, from a sensor container, information indicating an orientation of the sensor container. The controller, based on the information indicating the orientation of the sensor container, calculates a calculated value indicating a remaining amount of contents of the sensor container. The controller determines an estimated value of the remaining amount on the basis of the calculated value. The communication interface transmits the estimated value indicating the remaining amount to an external device. When the calculated value indicating the remaining amount decreases by a first predetermined value or more within a predetermined time period, the controller does not perform the determination of the estimated value on the basis of the calculated value.

Abstract: A base station includes: a wireless communication unit that performs wireless communication with a relay device; a storage that stores information on a reflected wave of a communication channel used to communicate with the relay device; and a controller that: estimates from the information whether a communication channel upon establishing a wireless channel with the relay device is affected by a reflected wave; allocates the communication channel as the wireless channel with the relay device in a case where it is estimated from the information that the communication channel is not affected by the reflected wave; and does not allocate the communication channel as the wireless channel with the relay device in a case where it is estimated from the information that the communication channel is affected by the reflected wave.

Abstract: An information processing apparatus includes a communication interface and a controller. The communication interface receives, from a sensor container, information indicating an orientation of the sensor container. The controller, based on the information indicating the orientation of the sensor container, calculates a calculated value indicating a remaining amount of contents of the sensor container. The controller determines an estimated value of the remaining amount on the basis of the calculated value. The communication interface transmits the estimated value indicating the remaining amount to an external device. When the calculated value indicating the remaining amount decreases by a first predetermined value or more within a predetermined time period, the controller does not perform the determination of the estimated value on the basis of the calculated value.

Abstract: A base station includes: a wireless communication unit that performs wireless communication with a relay device; a storage that stores information on a reflected wave of a communication channel used to communicate with the relay device; and a controller that: estimates from the information whether a communication channel upon establishing a wireless channel with the relay device is affected by a reflected wave; allocates the communication channel as the wireless channel with the relay device in a case where it is estimated from the information that the communication channel is not affected by the reflected wave; and does not allocate the communication channel as the wireless channel with the relay device in a case where it is estimated from the information that the communication channel is affected by the reflected wave.

Abstract: A communication device and method are disclosed. Transmitted signals are transmitted from antennas. A beam is formed based on known-received signals by controlling a transmission directionality of the antennas. Transmitted power of the transmitted signals is controlled based on a time interval between a reception time during which the known-received signals are received and a transmission time during which the transmitted signals are transmitted.

Abstract: A communication apparatus includes: a quadrature detection unit 13 for performing a quadrature detection on a baseband OFDM signal and generating a complex OFDM signal; an FFT unit for performing a Fourier transform process on the complex OFDM signal and outputting a complex symbol with respect to each subcarrier; and a reception power calculation unit for obtaining a reception power of a reception signal based on the sum of squares of an in-phase signal and a quadrature signal of the complex symbol of the subcarrier outputted from the FFT unit. The reception power calculation unit includes a table indicating the relationship between the reception power and the sum of squares of the in-phase signal and the quadrature signal of the complex symbol, and obtains the reception power of the reception signal by using the table.

Abstract: A communication device and method are disclosed. Transmitted signals are transmitted from antennas. A beam is formed based on known-received signals by controlling a transmission directionality of the antennas. Transmitted power of the transmitted signals is controlled based on a time interval between a reception time during which the known-received signals are received and a transmission time during which the transmitted signals are transmitted.

Abstract: In an adaptive array terminal, at least one of two antennas (ANT#1, ANT#2) is a movable antenna. A display unit (6) of the terminal displays reception levels of, or level difference between, the two antennas. Thus, it becomes possible for a user to adjust an angle of the antenna such that reception levels of the two antennas come closer to the same level. Alternatively, a control unit (8) of the terminal automatically adjusts the antenna angle so that reception level difference between the two antennas becomes not higher than a prescribed value.

Abstract: A receiver receives a request for channel assignment from a terminal apparatus. Triggered by the receipt of the request by the receiver, a channel measurement unit performs carrier sense of channels defined by a combination of a frequency resource and a temporal resource. The channel measurement unit assigns any of the channels, on which the carrier sense has been performed, to the terminal. When a plurality of channels are assigned to the same terminal apparatus, a channel to be assigned is selected in consideration of the channels which have already assigned to the terminal apparatus.

Abstract: Deterioration of transmission efficiency due to a change in modulation scheme is prevented. A terminal apparatus determines a line which is to be given the priority between an uplink or downlink, according to an application activating operation from an operator, and then makes a request accordingly to a base station apparatus. The base station apparatus detects a request signal on a downlink or uplink to be prioritized. If the request signal indicates that the downlink be prioritized, the execution of a processing of changing a transmission rate of the uplink involving the stoppage of the downlink is cancelled. If the request signal indicates that the uplink be prioritized, the execution of a processing of changing a transmission rate of the downlink involving the stoppage of the uplink is cancelled.

Abstract: When there is a connection request to a base station supporting adaptive modulation from a terminal supporting adaptive modulation, the base station measures a D wave level that indicates communication environment of the transmission path. When the measured D wave level is not lower than a threshold value of D wave level at which communication is possible by a modulation method (16QAM) having larger multi-value number, the base station permits allocation of a wireless channel to the terminal. Therefore, even when the modulation method is switched from one having smaller multi-value number (?/4 shift QPSK) to one having larger multi-value number (16QAM) during communication after channel allocation to the terminal, degradation of communication quality due to the communication environment of the transmission path can be prevented.

Abstract: In an adaptive array terminal, at least one of two antennas (ANT#1, ANT#2) is a movable antenna. A display unit of the terminal displays reception levels of, or level difference between, the two antennas. Thus, it becomes possible for a user to adjust an angle of the antenna such that reception levels of the two antennas come closer to the same level. Alternatively, control unit of the terminal automatically adjusts the antenna angle so that reception level difference between the two antennas becomes not higher than a prescribed value.

Abstract: A slot of a low multiplicity is processed to narrow transmission timing intervals for already-connected users and thereby to make preparation for a new user, and a slot of a high multiplicity is processed to keep the maximum transmission timing intervals for the already-connected users so that the preparation for the new user is not performed. As a result, it is possible to provide the slot prepared for the new user while maximizing the transmission timing intervals. Further, the transmission timing intervals for the already-connected users are kept as large as possible during the traffic channel for preventing the deterioration of characteristics, and the shifting of the transmission timing is performed for the new user during the control channel so that the optimum transmission timing intervals can be achieved when the traffic channel is established. A DSP (14) executes the processing.

Abstract: When once determined to be free of any demodulation error by an interference removing unit provided user by user, a replica signal calculated by the interference removing unit is subtracted from an input signal vector, and a calculated user signal is output as it is as a final user signal. When it is determined by the interference removing unit that there is a demodulation error, the user signal is again calculated by the interference removing unit of an interference canceller of a next stage. As subtraction of the replica signal corresponding to the user signal having a demodulation error from the input signal vector is inhibited, precision of the interference wave removal can be improved.

Abstract: In an adaptive array terminal, at least one of two antennas (ANT#1, ANT#2) is a movable antenna. A display unit (6) of the terminal displays reception levels of, or level difference between, the two antennas. Thus, it becomes possible for a user to adjust an angle of the antenna such that reception levels of the two antennas come closer to the same level. Alternatively, a control unit (8) of the terminal automatically adjusts the antenna angle so that reception level difference between the two antennas becomes not higher than a prescribed value.

Abstract: Deterioration of transmission efficiency due to a change in modulation scheme is prevented. A terminal apparatus determines a line which is to be given the priority between an uplink or downlink, according to an application activating operation from an operator, and then makes a request accordingly to a base station apparatus. The base station apparatus detects a request signal on a downlink or uplink to be prioritized. If the request signal indicates that the downlink be prioritized, the execution of a processing of changing a transmission rate of the uplink involving the stoppage of the downlink is cancelled. If the request signal indicates that the uplink be prioritized, the execution of a processing of changing a transmission rate of the downlink involving the stoppage of the uplink is cancelled.

Abstract: When once determined to be free of any demodulation error by an interference removing unit provided user by user, a replica signal calculated by the interference removing unit is subtracted from an input signal vector, and a calculated user signal is output as it is as a final user signal. When it is determined by the interference removing unit that there is a demodulation error, the user signal is again calculated by the interference removing unit of an interference canceller of a next stage. As subtraction of the replica signal corresponding to the user signal having a demodulation error from the input signal vector is inhibited, precision of the interference wave removal can be improved.

Abstract: When once determined to be free of any demodulation error by an interference removing unit provided user by user, a replica signal calculated by the interference removing unit is subtracted from an input signal vector, and a calculated user signal is output as it is as a final user signal. When it is determined by the interference removing unit that there is a demodulation error, the user signal is again calculated by the interference removing unit of an interference canceller of a next stage. As subtraction of the replica signal corresponding to the user signal having a demodulation error from the input signal vector is inhibited, precision of the interference wave removal can be improved.