Abstract: A system including a plurality of base stations and terminal stations. A base station includes a transmission signal amplifier enabled to vary transmission power, provides a specification regarding an input-output characteristic of the transmission signal amplifier to a terminal station, and provides transmission power to the terminal station. The terminal station estimates a constellation of a signal points on the basis of the transmission power and the specification, detects a coordinate point on constellation coordinates, of a reception signal, and detects interference power received from base stations and that are not communication partners. Further, a reception point is calculated in which an influence of the interference power is reflected on the coordinate point, and a likelihood with the signal points is calculated for the reception point. Then, a symbol intended by the reception signal is specified on the basis of a calculation result of the likelihood.

Abstract: A roughened plated sheet including a roughened plated layer having a roughened nickel plated layer and a zinc plated layer formed on at least one surface of a metal substrate in this order from the metal substrate side, wherein a ten-point average roughness RZjis of a surface of the roughened plated layer, according to laser microscope measurement, is 3 ?m or more, an adhesion amount of the roughened nickel plated layer is 0.4 to 14.0 g/m2, and an adhesion amount of the zinc plated layer is 3 g/m2 or more.

Abstract: Provided is a wireless communication system using a single-carrier multi-value modulation scheme, the wireless communication system aiming at preventing erroneous transmission of data and securing a high data rate while utilizing a non-linear region of an amplifier. A reception apparatus acquires, from a transmission apparatus, a specification related to an input/output characteristic of a transmission signal amplifier and transmission power of data transmission. On the basis of the specification and the transmission power, a constellation of signal points is estimated. A reception point, which is a point in constellation coordinates, of a reception signal is detected, and likelihood calculation for the reception point is performed with respect to the signal points. A symbol intended by the reception point is identified on the basis of a result of the likelihood calculation.

Abstract: A wireless communication method according to an embodiment includes precoding a stream of a transmission signal in a time domain by using an FIR filter, controlling a transmission power of the precoded stream, amplifying the precoded stream such that the controlled transmission power is obtained; and performing control for changing a tap length in precoding such that the tap length is decreased in a case where a magnitude of a last tap coefficient in precoding is small and the tap length is increased in a case where the magnitude is large, with respect to a threshold value calculated on the basis of quality information of a received signal fed back from a reception device that has received the amplified stream or quality information of a received signal calculated by using at least characteristics of an amplifier.

Abstract: The present disclosure relates to a wireless communication system using a quadrature amplitude modulation scheme. A transmission device includes: a transmission signal amplifier enabled to vary transmission power; a transmission power control unit that controls the transmission power; and an approximate pattern information notification unit that generates pattern information on an approximate constellation. In a case where 64 QAM is used as the modulation scheme, a 64 QAM distortion constellation is generated in the non-linear region of the transmission signal amplifier. In this case, a 64 APSK approximate constellation is generated, and pattern information on the 64 APSK approximate constellation is transmitted to a reception device. The reception device performs likelihood calculation for a reception point indicated by a data signal by using the approximate constellation corresponding to the pattern information.

Abstract: A roughened plated sheet including a roughened plated layer having a roughened nickel plated layer and a zinc plated layer formed on at least one surface of a metal substrate in this order from the metal substrate side, wherein a ten-point average roughness Rzjis of a surface of the roughened plated layer, according to laser microscope measurement, is 3 ?m or more, and the metal substrate is a steel sheet.

Abstract: A radio wave arrival direction estimation device according to an embodiment includes an antenna angle acquisition unit that acquires each of antenna angles indicating a plurality of different directions in which antennas having non-uniform antenna patterns are sequentially directed, a reception intensity measurement unit that measures reception intensities at which the antenna has received a radio wave at each of the antenna angles acquired by the antenna angle acquisition unit, a matching degree Calculation unit that calculates a matching degree between the antenna angle acquired by the antenna angle acquisition unit and the reception intensity measured by the reception intensity measurement unit, and an antenna pattern of the antenna for each antenna angle acquired by the antenna angle acquisition unit, and an estimation unit that estimates an antenna angle at which the matching degree Calculated by the matching degree Calculation unit is the maximum as an arrival direction of the radio wave.

Abstract: A wireless communication system according to an embodiment is a wireless communication system, in which a transmission device transmits the training signal to a reception device such that a plurality of signal points having different amplitudes on a constellation is included, and the reception device includes: an estimation unit that estimates the signal points included in the training signal of a case where it is assumed that, an input-output characteristic in a non-linear region of an amplifier is also linear; an equalization unit that performs initial equalization on a received signal; a correction unit that corrects a signal subjected to initial equalization by the equalization unit on the basis of the signal points estimated by the estimation unit; a likelihood calculation unit that calculates, with respect to a constellation before the amplifier amplifies a signal, a likelihood of a signal corrected by the correction unit.

Abstract: A movable body includes an imaging system which acquires an image formed by a terahertz wave, wherein the image is an image obtained by capturing an inspection object inside the movable body.

Abstract: A processing system comprising a first imaging system configured to capture a first image based on a terahertz wave from an inspection target, a second imaging system configured to capture a second image of the inspection target based on an electromagnetic wave of a wavelength different from the terahertz wave, and a processor configured to process the first image and the second image, wherein the processor detects an inspection region based on the second image and processes information of a region of the first image corresponding to the inspection region.

Abstract: An oscillator oscillating a tera hertz wave includes a negative resistive element including a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer, with a first conductor, a second conductor, and a dielectric disposed between the first conductor and the second conductor constitutes a resonator, wherein the negative resistive element is disposed between the first conductor and the second conductor, and a layer with a higher resistivity than the first semiconductor layer or the second semiconductor layer, or an amorphous layer is disposed between the negative resistive element and the dielectric.

Abstract: An oscillator oscillating a tern hertz wave includes a negative resistive element including a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer, with a first conductor, a second conductor, and a dielectric disposed between the first conductor and the second conductor constitutes a resonator, wherein the negative resistive element is disposed between the first conductor and the second conductor, and a layer with a higher resistivity than the first semiconductor layer or the second semiconductor layer, or an amorphous layer is disposed between the negative resistive element and the dielectric.

Abstract: A semiconductor apparatus comprising: an element substrate including a plurality of semiconductor devices which detect or oscillate terahertz waves; and an electromagnetic shielding in a mesh form disposed in front of a surface detecting or oscillating the terahertz waves in the element substrate and formed of a conductive material, wherein a line width of the electromagnetic shielding is not more than a wavelength of the terahertz waves.

Abstract: A camera system is provided. The camera system is arranged to form a part of a monitoring system arranged in a place of a facility where an inspection object lines up. The camera system comprises an imaging system configured to acquire an image formed by a terahertz wave reflected by the inspection object.

Abstract: A processing system comprising a first imaging system configured to capture a first image based on a terahertz wave from an inspection target, a second imaging system configured to capture a second image of the inspection target based on an electromagnetic wave of a wavelength different from the terahertz wave, and a processor configured to process the first image and the second image, wherein the processor detects an inspection region based on the second image and processes information of a region of the first image corresponding to the inspection region.

Abstract: A movable body includes an imaging system which acquires an image formed by a terahertz wave, wherein the image is an image obtained by capturing an inspection object inside the movable body.

Abstract: A semiconductor apparatus comprising: an element substrate including a plurality of semiconductor devices which detect or oscillate terahertz waves; and an electromagnetic shielding in a mesh form disposed in front of a surface detecting or oscillating the terahertz waves in the element substrate and formed of a conductive material, wherein a line width of the electromagnetic shielding is not more than a wavelength of the terahertz waves.

Abstract: A probe array in which probes are arranged on a cup-shaped acoustic wave detector at high density. In the probe array, transducers (acoustic wave conversion elements) configured to be capable of conversion between acoustic waves and an electrical signal are provided on a support member (housing).

Abstract: Provided is a method of manufacturing an element substrate, including: forming first and second resists on a predetermined surface of a substrate so that part of the predetermined surface is exposed; etching the substrate with the first and second resists being used as a mask to form a first recess in the substrate; removing the second resist to expose a portion of the substrate that is different from the first recess; etching the substrate with the first resist being used as a mask to deepen the first recess and to form a second recess communicating with the first recess in the substrate; and covering openings of the first and second recesses with an orifice forming member to form a pressure chamber by the first recess and an orifice forming member and to form a flow reducing portion by the second recess and the orifice forming member.

Abstract: A liquid ejection head includes a plurality of piezoelectric transducers that are configured to generate energy for respectively ejecting liquid from a plurality of ejection ports and arranged in line so as to constitute a plurality of columns and a common electrode connected to the plurality of piezoelectric transducers. The common electrode is provided with a plurality of first connection areas to which the plurality of piezoelectric transducers are connected commonly in units of columns and a second connection area that connects the plurality of first connection areas to one another. This liquid ejection head further includes a reinforcing wiring laminated on the second connection area and a wiring substrate including a drive wiring that is connected to the reinforcing wiring at at least one connection point and electrically connected to the common electrode via the connection point.