Abstract: A radio communication device includes: a plurality of antenna elements; a phase shifter that applies weights for each of the antenna elements respectively to first-band data and second-band data of different frequency bands to form beams corresponding to the first-band data and the second-band data; a power amplifier that is arranged for each of the antenna elements; and a processor configured to compensate for non-linear distortion.

Abstract: An array antenna system includes DPD that suppresses first IMD in a first band adjacent to a band of a transmission signal, antenna elements that include a first element and a second element, phase shifters that each correspond to each of the elements and form a transmission signal directed to a predetermined direction and second IMD, by applying a weight to the signal and the second IMD in a second band adjacent to the first band, a first amplifier that amplifies the signal directed to the direction and first distortion serving as the second IMD, that are output from a first shifter of the first element, and a second amplifier that amplifies the signal directed to the direction and second distortion a phase of which is opposite to that of the first distortion serving as the second IMD, that are output from a second shifter of the second element.

Abstract: Provided with a cord-shaped heater and a sheet-shaped heater using the cord-shaped heater enabling to process the terminal easily. A cord-shaped heater 10 including one or a plurality of conductive wires 5a covered with an insulating film 5b, wherein the insulating film 5b at least includes an inner layer formed on the conductive wires 5a and an outer layer formed outside the inner layer, and the thermal decomposition temperature of a first material constituting the inner layer is lower than the melting temperature of a second material constituting the outer layer and lower than the thermal decomposition temperature of the second material. The cord-shaped heater 10, wherein first material constituting the inner layer is selected from the group consisting of a polyurethane resin and a polyester resin, and the second material constituting the outer layer is selected from the group consisting of a polyimide resin, a polyamide imide resin and a silicone resin.

Abstract: A wireless communication device includes: a plurality of power amplifiers provided for a plurality of respective antenna elements, each of the power amplifiers amplifying a signal; a distortion compensation unit that executes distortion compensation of a transmission signal by using an inverse function corresponding to nonlinear distortion generated in the power amplifiers; and a controller that operates by switching a first mode and a second mode, the first mode setting individual inverse functions for the respective power amplifiers in the distortion compensation unit and updating coefficients of the individual inverse functions, the second mode suspending the update of the coefficients of the individual inverse functions and setting, in the distortion compensation unit, an integrated inverse function acquired by performing weighted addition of the individual inverse functions.

Abstract: A wireless communication apparatus includes a plurality of antenna elements; a plurality of power amplifiers provided in the plurality of antenna elements; a processor that outputs a transmission signal to the plurality of power amplifiers; and a plurality of feedback paths each of which allows a feedback signal to be fed back from the plurality of power amplifiers to the processor, wherein the processor executes a process for collectively correcting variations in analog characteristics exhibited in the plurality of feedback paths, and a process for updating, by using the transmission signal and the feedback signal that are obtained by being corrected, a distortion compensation coefficient that is used to compensate nonlinear distortion produced in the plurality of power amplifiers.

Abstract: A signal processing device includes: a first subarray that includes power amplifiers and phase shifters and that forms a first beam facing in a first direction; a second subarray that includes power amplifiers and phase shifters and that forms a second beam facing in a second direction; a feedback unit that feeds back at least signals that are output from the power amplifiers included in the first subarray; and a processor that is connected to the first subarray and the second subarray. The processor executes a process including: generating, based on a first feedback signal and a transmission signal output to the first subarray, a cancellation signal corresponding to an interference component applied to the second beam by the first beam; and adding the generated cancellation signal to a transmission signal output to the second subarray.

Abstract: A radio communication device includes: a plurality of antenna elements; a phase shifter that applies weights for each of the antenna elements respectively to first-band data and second-band data of different frequency bands to form beams corresponding to the first-band data and the second-band data; a power amplifier that is arranged for each of the antenna elements; and a processor configured to compensate for non-linear distortion.

Abstract: A wireless communication device includes: a plurality of power amplifiers provided for a plurality of respective antenna elements, each of the power amplifiers amplifying a signal; a distortion compensation unit that executes distortion compensation of a transmission signal by using an inverse function corresponding to nonlinear distortion generated in the power amplifiers; and a controller that operates by switching a first mode and a second mode, the first mode setting individual inverse functions for the respective power amplifiers in the distortion compensation unit and updating coefficients of the individual inverse functions, the second mode suspending the update of the coefficients of the individual inverse functions and setting, in the distortion compensation unit, an integrated inverse function acquired by performing weighted addition of the individual inverse functions.

Abstract: A wireless communication apparatus includes: a processor that performs distortion compensation on a complex number transmission signal by using a distortion compensation coefficient; a power amplifier that amplifies the transmission signal subjected to distortion compensation by the processor; and a feedback path that feeds back a signal output from the power amplifier to supply a real number feedback signal to the processor. The processor executes a process including: estimating a complex number feedback signal by performing linear computation on the complex number transmission signal and the real number feedback signal; and updating the distortion compensation coefficient by using the estimated complex number feedback signal.

Abstract: A wireless communication apparatus includes: a plurality of antenna elements; a processor that outputs an in-phase signal and a quadrature signal; a splitter that distributes the in-phase signal and the quadrature signal to the antenna elements; and a plurality of quadrature modulators that generate transmission signals of a radio frequency by performing quadrature modulation on the in-phase signals and the quadrature signals. The processor is configured to execute a process including applying a first frequency shift according to a transmission beam direction to a first oscillation signal that is supplied to the quadrature modulators, digitally modulating transmission data to generate the in-phase signal and the quadrature signal, and performing complex multiplication to the in-phase signal and the quadrature signal with a second oscillation signal to which a second frequency shift opposite from the first frequency shift is applied.

Abstract: A wireless communication apparatus includes: a plurality of antenna elements; a processor that outputs an in-phase signal and a quadrature signal; a splitter that distributes the in-phase signal and the quadrature signal to the antenna elements; and a plurality of quadrature modulators that generate transmission signals of a radio frequency by performing quadrature modulation on the in-phase signals and the quadrature signals. The processor is configured to execute a process including applying a first frequency shift according to a transmission beam direction to a first oscillation signal that is supplied to the quadrature modulators, digitally modulating transmission data to generate the in-phase signal and the quadrature signal, and performing complex multiplication to the in-phase signal and the quadrature signal with a second oscillation signal to which a second frequency shift opposite from the first frequency shift is applied.

Abstract: A signal processing device includes: a first subarray that includes power amplifiers and phase shifters and that forms a first beam facing in a first direction; a second subarray that includes power amplifiers and phase shifters and that forms a second beam facing in a second direction; a feedback unit that feeds back at least signals that are output from the power amplifiers included in the first subarray; and a processor that is connected to the first subarray and the second subarray. The processor executes a process including: generating, based on a first feedback signal and a transmission signal output to the first subarray, a cancellation signal corresponding to an interference component applied to the second beam by the first beam; and adding the generated cancellation signal to a transmission signal output to the second subarray.

Abstract: A wireless communication apparatus includes: a processor that performs distortion compensation on a complex number transmission signal by using a distortion compensation coefficient; a power amplifier that amplifies the transmission signal subjected to distortion compensation by the processor; and a feedback path that feeds back a signal output from the power amplifier to supply a real number feedback signal to the processor. The processor executes a process including: estimating a complex number feedback signal by performing linear computation on the complex number transmission signal and the real number feedback signal; and updating the distortion compensation coefficient by using the estimated complex number feedback signal.

Abstract: An internal combustion engine according to the present disclosure has an ignition coil and an injector that share a power source, and has a controller that controls energization to the ignition coil and energization to the injector. The controller executes setting processing and correction processing. In the setting processing, the controller sets an energization period of the ignition coil in accordance with an operating condition of the internal combustion engine. In the correction processing, when the energization period of the ignition coil overlaps with an energization period of the injector, the controller corrects the energization period of the ignition coil so as to reduce an overlap period between the energization period of the ignition coil and the energization period of the injector.

Abstract: A distortion compensation device includes a generating unit, a calculation unit, a conversion unit, and a distortion compensation unit. The generating unit generates, from an output signal of a power amplifying unit that amplifies transmission signals having a plurality of different bands, a superimposed signal in which the transmission signals having the different bands have been superimposed. The calculation unit calculates, based on the superimposed signal, a coefficient indicating a forward characteristic of nonlinear distortion of the power amplifying unit associated with each of the transmission signals having the different bands. The conversion unit converts the coefficient calculated by the first calculation unit to a coefficient indicating an inverse characteristic of the nonlinear distortion of the power amplifying unit.

Abstract: There is a control system for a hybrid vehicle including an internal combustion engine including a throttle valve on an intake air passage, and a generator coupled to an output shaft of the engine. The control system includes a controller. The controller is configured to detect shaft torque of the output shaft of the engine by the generator, calculate an actual value of a throttle flow rate based on the shaft torque, the flow rate being an amount of air that flows through the throttle valve, and learn flow rate characteristics indicating a relationship between a throttle opening being a degree of opening of the throttle valve and the throttle flow rate, based on an actual value of the throttle opening and the actual value of the throttle flow rate.

Abstract: A multiantenna communication device forms a directional beam by adding an antenna weight to respective signals of a plurality of antenna elements. The multiantenna communication device includes: a processor that executes performing distortion compensation on a transmission signal by using a distortion compensation coefficient; a plurality of power amplifiers that are provided corresponding to the antenna elements, and that amplify the transmission signal subjected to the distortion compensation by the processor; a multiplexer that multiplexes signals output from the power amplifiers to feed back; and an analog/digital (A/D) converter that A/D converts a multiplex feedback signal that is obtained by the multiplexer, wherein the processor executes updating the distortion compensation coefficient by using the multiplex feedback signal A/D converted by the A/D converter and the transmission signal.

Abstract: A distortion compensation device includes a generating unit, a calculation unit, a conversion unit, and a distortion compensation unit. The generating unit generates, from an output signal of a power amplifying unit that amplifies transmission signals having a plurality of different bands, a superimposed signal in which the transmission signals having the different bands have been superimposed. The calculation unit calculates, based on the superimposed signal, a coefficient indicating a forward characteristic of nonlinear distortion of the power amplifying unit associated with each of the transmission signals having the different bands. The conversion unit converts the coefficient calculated by the first calculation unit to a coefficient indicating an inverse characteristic of the nonlinear distortion of the power amplifying unit.

Abstract: There is a control system for a hybrid vehicle including an internal combustion engine including a throttle valve on an intake air passage, and a generator coupled to an output shaft of the engine. The control system includes a controller. The controller is configured to detect shaft torque of the output shaft of the engine by the generator, calculate an actual value of a throttle flow rate based on the shaft torque, the flow rate being an amount of air that flows through the throttle valve, and learn flow rate characteristics indicating a relationship between a throttle opening being a degree of opening of the throttle valve and the throttle flow rate, based on an actual value of the throttle opening and the actual value of the throttle flow rate.

Abstract: A distortion compensation apparatus includes: a generation unit that generates a first signal to be used on a transmission side and a feedback side in common; a conversion unit that converts a frequency of a third signal that is to be an even-order distortion compensation signal by using a second signal that is based on the first signal; and a compensation unit that compensates an even-order distortion in a transmission signal caused by amplification by using a signal obtained by frequency conversion for the third signal by the conversion unit.