Abstract: A processor of radio communication control device estimates beams provided by communication device that supports spatial multiplexing. The processor estimate, for each user terminal, received power of a signal from corresponding user terminal by using target beam associated with target user terminal. The processor determines selection probability indicating a probability that the target user terminal is selected and simultaneous selection probability indicating a probability that the other user terminal is selected when the target user terminal is selected based on selection policy. The processor estimates average interference power for a signal transmitted from the target user terminal and simultaneous selection probability of each of the other user terminal. The processor estimates average transmission rate between the communication device and the target user terminal based on the received power, the average interference power, and the selection probability of the target user terminal.

Abstract: A radio communication apparatus includes a plurality of antennas, a radio transmission unit configured to execute radio transmission processing on data to be transmitted from the plurality of antennas, and a processor connected to the radio transmission unit. The processor executes a process including acquiring beam group specification information that specifies a beam group that is capable of being formed when the data to be transmitted is transmitted, forming at least one beam included in the beam group, and correcting an envelope of a beam group using correction factors, the beam group including the at least one beam formed, the correction factors corresponding to the beam group specification information.

Abstract: A method for manufacturing a semiconductor device according to an aspect of the present disclosure includes a step of preparing a dicing/die-bonding integrated film including an adhesive layer formed of a heat-curable resin composition having a melt viscosity of 3100 Pa·s or higher at 120° C., a tacky adhesive layer, and a base material film; a step of sticking a surface on the adhesive layer side of the dicing/die-bonding integrated film and a semiconductor wafer together; a step of dicing the semiconductor wafer; a step of expanding the base material film and thereby obtaining adhesive-attached semiconductor elements; a step of picking up the adhesive-attached semiconductor element from the tacky adhesive layer; a step of laminating this semiconductor element to another semiconductor element, with the adhesive interposed therebetween; and a step of heat-curing the adhesive.

Abstract: A liquid discharge device includes a plurality of sets of a liquid chamber, a nozzle, a piezoelectric element, and an output waveform generator. The liquid chamber stores a liquid. The nozzle communicates with the liquid chamber. The piezoelectric element causes the liquid in the liquid chamber to be discharged from the nozzle as a droplet in response to application of a voltage to the piezoelectric element. The output waveform generator generates a drive waveform of the voltage applied to the piezoelectric element. The output waveform generator includes an output voltage selector to combine multiple voltages to generate the drive waveform and a slope switching selector to switch a slope of the drive waveform generated by the output voltage selector.

Abstract: A method for manufacturing a semiconductor device according to an aspect of the present disclosure includes a step of preparing a dicing/die-bonding integrated film including an adhesive layer formed of a heat-curable resin composition having a melt viscosity of 3100 Pa·s or higher at 120° C., a tacky adhesive layer, and a base material film; a step of sticking a surface on the adhesive layer side of the dicing/die-bonding integrated film and a semiconductor wafer together; a step of dicing the semiconductor wafer; a step of expanding the base material film and thereby obtaining adhesive-attached semiconductor elements; a step of picking up the adhesive-attached semiconductor element from the tacky adhesive layer; a step of laminating this semiconductor element to another semiconductor element, with the adhesive interposed therebetween; and a step of heat-curing the adhesive.

Abstract: A communication control device includes: a beam forming unit that forms a beam by controlling a phase of a transmission signal that is transmitted through each of a plurality of antennas; a phase adjusting unit that applies phase rotation to the transmission signal to compensate for a phase shift at each frequency of the transmission signal, whose phase is controlled by the beam forming unit, the phase shift corresponding to a signal bandwidth of the transmission signal; and a control unit that controls the phase rotation that is applied to the transmission signal by the phase adjusting unit.

Abstract: A communication system includes a first communication device, and a second communication device, wherein the first communication device includes a first memory, and a first processor coupled to the first memory and configured to detect that a first communication between the first communication device and a terminal device has been cut off, specify, when the first communication has been cut off, a first direction from the second communication device to the terminal device, and transmit, to the second communication device, direction information indicating the first direction and a transmission request requesting a transmission of data, and the second communication device includes a second memory, and a second processor coupled to the second memory and configured to receive the direction information and the transmission request, and transmit, based on the direction information and the transmission request, the data to the terminal device.

Abstract: A radio-wave arrival-direction estimation device includes: a processor configured to: determine a plurality of amplitude distributions to be used for signal receptions by respective antennas in a plurality of antenna elements that constitute a plurality of antennas; switch among the amplitude distributions determined for each of the signal receptions; and estimate a radio-wave arrival direction of a reception signal based on a correlation coefficient of the reception signal between different antennas and the amplitude distributions switched.

Abstract: A wireless communication apparatus including a memory and a processor coupled to the memory and the processor configured to transmit a plurality of radio signals for a plurality of directions by forming a plurality of first beams, each of plurality of first beams having a directivity in at least two directions, estimate a direction in which a reception apparatus is located based on first reception quality information indicating a reception quality when the reception apparatus receives at least one radio signal included in the plurality of radio signals, and perform a radio communication with the reception apparatus by forming a beam corresponding to the estimated direction.

Abstract: A transmission power management device including: a memory, and a processor coupled to the memory and configured to: acquire a first path loss between a first relay station and a second relay station, the first relay station relaying a first signal, the second relay station relaying a second signal, and adjust a first transmission power of the first signal by the first relay station based on the first path loss.

Abstract: A base station that performs beamforming on a user equipment includes an acquiring unit that acquires a distribution of propagation losses in a communication area, a deciding unit that decides a beam set formed by a plurality of beams that are used for channel estimation, each of the beams having a beam width based on the distribution, and an antenna that transmits a reference signal to the user equipment by using each of the beams that form the beam set.

Abstract: A radio communication device including a memory and a processor coupled to the memory and the processor configured to determine a method, among a plurality of methods for beam forming, to be used for forming a first beam for a first terminal and a second beam for a second terminal based on a difference between an emitting direction of the first beam, to be formed, from the radio communication device and an estimated direction of the second terminal from the radio communication apparatus, the estimated direction being estimated based on a received signal from a second terminal, and form the first beam and the second beam based on the determined method.

Abstract: A wireless communication device including: a plurality of phase shifters, each of the plurality of phase shifters adjusting each amplitude and each phase of each analog signal by each element of a transmission weight vector, each analog signal being generated by multiplexing a plurality of signals that are addressed to a plurality of terminals respectively, a plurality of antennas, each of the plurality of antennas transmitting each analog signal whose phase has been shifted by each of the plurality of phase shifter, and a processor configured to: obtain a plurality of steering vectors that correspond to the plurality of terminals respectively, and generate the transmission weight vector by combining the plurality of steering vectors.

Abstract: A control apparatus in a wireless communication system including a base station, a plurality of relay stations, and a plurality of terminals, each of the plurality of relay stations being configured to relay wireless signals between the base station and the plurality of terminals, the control apparatus including: a memory, and a processor coupled to the memory and configured to determine relay schedules based on first information associated with first path losses between any pair of the plurality of relay stations, each of the relay schedules defining each of relay periods for each of the plurality of relay stations relaying the wireless signals, and transmit each of the relay schedules to each of the plurality of relay stations respectively.

Abstract: A base station including: a memory, and a processor coupled to the memory and configured to: transmit a radio signal using a plurality of antennas in a first period for transmission of the base station in a time division duplex (TDD) mode, at least a part of the first period overlapping with at least a part of a second period for reception of another base station in the TDD mode, receive a specific information from the another base station, the first information indicating a channel characteristic from the base station to the another base station, the channel characteristic being estimated in accordance with the transmitted radio signal, and determine at least one correction coefficient to compensate for a difference of specific characteristics among the plurality of antennas based on the received specific information.

Abstract: A control apparatus in a wireless communication system including a base station, a plurality of relay stations, and a plurality of terminals, each of the plurality of relay stations being configured to relay wireless signals between the base station and the plurality of terminals, the control apparatus including: a memory, and a processor coupled to the memory and configured to determine relay schedules based on first information associated with first path losses between any pair of the plurality of relay stations, each of the relay schedules defining each of relay periods for each of the plurality of relay stations relaying the wireless signals, and transmit each of the relay schedules to each of the plurality of relay stations respectively.

Abstract: A radio base station including: a processor configured to precode a first reference signal based on a first precoding matrix and a second reference signal based on a second precoding matrix, transmit the precoded first reference signal using a first radio resource and the precoded second reference signal using a second radio resource, to a radio terminal, receive first channel state information and second channel state information from the radio terminal, the first channel state information indicating a first channel estimated at the radio terminal based on the precoded first reference signal, the second channel state information indicating a second channel estimated at the radio terminal based on the precoded second reference signal, and estimate a downlink channel between the radio base station and the radio terminal based on the first channel state information, the second channel state information, the first precoding matrix, and the second precoding matrix.

Abstract: A transmission power management device including: a memory, and a processor coupled to the memory and configured to: acquire a first path loss between a first relay station and a second relay station, the first relay station relaying a first signal, the second relay station relaying a second signal, and adjust a first transmission power of the first signal by the first relay station based on the first path loss.

Abstract: A method of forming barrier ribs includes the following steps. The first step is to form a barrier rib material layer on a substrate. The second step is to form a resist film on the barrier rib material layer. The third step is to form the barrier rib material layer into a barrier rib pattern material layer. The fourth step is to remove the resist film from the barrier rib pattern material layer. The fifth step is to fire the barrier rib pattern material layer to form barrier ribs. In the above steps, a bonding layer is formed between the substrate and the barrier rib material layer. The bonding layer has such a bonding strength that sufficiently maintains the barrier rib pattern material layer on the substrate upon removing the resist film from the barrier rib pattern material, and is made from a thermally burning-out material that is burned out upon firing the barrier rib pattern material layer.

Abstract: A heating treatment method includes the steps of: preparing an array of heating chambers, the heating chambers being respectively provided with heaters and connected in series; transporting an object to be heated from an upstream side toward a downstream side of the array to allow the object to pass through the heating chambers; supplying and discharging a warm air flow to and from each heating chamber, and controlling an amount of each supplied warm air flow and an amount of each discharged warm air flow to generate an air flow traveling along a direction in which the object is raised in temperature.