Nec Corporation

Nippon Telegraph and Telephone Corporation

Tokyo Institute of Technology

Naoki Oshima

Keiichi Motoi

Kenichi Okada

Shinichi Hori

Kazuaki Kunihiro

Naoki Mukawa

Ryosuke Aoki

Jian Pang

Korkut Tokgoz

Ikuma Ando

Munenori Koyasu

Rui Wu

Implemented is a communication with reasonably smooth conversation even between people having different proficiency levels in a common language. Included are a voice recognition unit () that acquires a speech rate of a speaker and recognizes a voice on a speech content; and a call voice processing unit () that processes a part of a voice recognition result based on a result of comparing the acquired speech rate with a reference speech rate, and transmits a video on which a text character image of the voice recognition result having been processed is superimposed to a communication terminal TM of the speaker.

Conversation assistance device, conversation assistance method, and program

Provided are an array communication device that makes phase correction between a plurality of arrays having bi-directional amplifiers possible and a method for controlling the array communication device. This array communication device comprises a plurality of array units that are connected to a common signal processing unit and each comprise an antenna, amplifier, and phase shifter. The array communication device further comprises first-directional couplers that are respectively disposed between the antennas and amplifiers of the array units and divide or combine signals, second-directional couplers that are respectively disposed between the phase shifters of the array units and the signal processing unit and divide or combine signals, and phase comparison means that each receive at least one from among a signal from a first-directional coupler and a signal from a second-directional coupler and a signal serving as a phase reference and carry out phase comparison and correction.

Array communication device and method for controlling same

A polarized wave shared array antennaA includes: planar antennasand, each of which generating two polarized waves of first and second polarized waves orthogonal to each other; feeding pointsandfor generating the first polarized wave, which are provided in the planar antenna, and feeding pointsandfor generating the second polarized wave, which are provided in the planar antenna; and an integrated circuitincluding transmission and reception units, andconnected to the respective feeding points, andvia wirings, in which in a plan view, with respect to an axis A, the feeding pointsand, respectively, are disposed symmetrical to the feeding pointsand, and the transmission and reception unitsand, respectively, are disposed symmetrical to the transmission and reception unitsand

Polarized wave shared array antenna and method for manufacturing the same

In order to enable a reduction in the time required to calibrate the amplitude phase of an antenna device, this processing device is provided with: a setting unit group which performs setting from a predetermined three or more-valued phase value regarding the phase value of a signal received by each of a plurality of antenna elements or a signal transmitted from each of the antenna elements with respect to a calibration signal, on the basis of information extracted from one control information, and derives set signals that are signals on which the setting has been performed; and a computing unit which outputs a correlation value that is a value indicating a correlation between the sum of the set signals and the control information.

Processing device, processing method, processing program and calibration device for array antenna

A polarized wave shared array antenna according to an example embodiment includes: antenna elementsandprovided adjacent to each other on one surface of an antenna substrate, each of which being configured to generate two orthogonal linear polarized waves; feeding pointsanddisposed in a first direction when viewed from each antenna element and feeding pointsanddisposed in a second direction orthogonal to the first direction when viewed from each antenna element; transmission and reception units, andthat are provided on an integrated circuit on the other surface of the antenna substrateand are respectively connected to the feeding points, in which in a plan view, the feeding points are disposed so as to be arranged on a straight line, and wirings connecting the transmission and transmission units to the corresponding feeding points are equal in length.

An interference signal generation device includes a first converter configured to perform conversion on a frequency of an input signal based on a center frequency of a frequency band to be interfered, and a second converter configured to further perform conversion on a frequency of an output signal of the first converter based on the center frequency.

Interference signal generation device, interference signal generation system, and interference signal generation method

A phased array antenna apparatusaccording to an example embodiment includes at least four patch antennasarranged in a two-dimensional array, and a semiconductor ICconnected to the patch antennas, in which the semiconductor ICincludes at least two first input/output terminalsthrough which a transmission/reception signal is input/output between the phased array antenna apparatus and an external apparatus connected to the phased array antenna apparatus, a plurality of second input/output terminalsconnected to feeding pointsof the patch antennasthrough respective feed lines, the plurality of second input/output terminals being terminals through which the transmission/reception signal is input/output, and a matrix switchcapable of changing a connection relation between the first input/output terminalsand the second input/output terminals

Phased array antenna apparatus and control method therefor

The present invention is provided with: a plurality of antenna units each including a plurality of antenna elements and a partial synthesizer that synthesizes first output signals of the respective antenna elements and outputs a second output signal; a partial power detection means that measures signal intensities of the respective second output signals; a position determination unit that determines the position of a communication device serving as a communication target based on the measured signal intensities of the respective second output signals; a summing synthesizer that synthesizes the second output signals of the plurality of antenna units and outputs a third output signal; and a phase control unit that controls phases of the respective antenna elements such that a main lobe, which is a beam having a maximum signal intensity for the third output signal, is directed to the position of the communication device determined by the position determination unit.

Wireless communication device, control method, and program

A phase adjustment circuit includes: a local frequency band phase shifter that adjusts a phase of a signal in a local signal frequency band and that outputs the adjusted signal; a frequency-converting mixer that receives the adjusted signal and another signal different from the adjusted signal, and that mixes the adjusted signal with the other signal; and a buffer amplifier that is provided between the local frequency band phase shifter and the frequency-converting mixer, and that is capable of amplifying an input power that is to be input to the frequency-converting mixer so that the input power is up to be in an input power range in which an input-output characteristic of power of the frequency-converting mixer is out of a linear region.

Phase adjustment circuit and array antenna device

An apparatus includes a first receiving unit, a second receiving unit, a signal generation unit, and a control unit, in which the first receiving unit includes a first adjustment unit configured to generate a first signal by adjusting a phase and an amplitude of a received signal, the second receiving unit includes a second adjustment unit configured to generate a second signal by adjusting a phase and an amplitude of a received signal, the signal generation unit generates a third signal based on the first and second signals, and the control unit controls the first adjustment unit based on the third signal.

Apparatus, control method, and non-transitory computer readable medium storing program

When a radio frequency (RF) unit is provided with a delay line or a switch, as the number of arrays (the number of antennas) increases, the parasitic capacitance of the antennas increases and the insertion loss of the switch increases. In addition, the insertion loss may further increase at high frequencies expected to be used in the future. An array antenna apparatus of the present invention is provided with: a plurality of antennas that receive signals; a plurality of down-converters that are connected respectively to the plurality of antennas and that down-convert the received signals; and a switch that selects at least one signal from among the plurality of down-converted signals, and transmits the at least one signal to an A/D converter.

Array antenna apparatus, receiver, and method of processing received signals

There is provided a variable RF filter receiving an input differential radio frequency signal from a differential input terminals and allowing a radio frequency signal around a desired frequency to pass therethrough, wherein first passive mixers driven by a rectangular wave clock signal having an arbitrarily determined frequency are connected in parallel to a signal line across the differential input terminals and differential output terminals, and wherein a load of each of the first passive mixers is configured by inductors. Further, as a clock signal driving each of the first passive mixers, an odd-multiple-wave Lo signal (for example, a triple-wave Lo signal) is used, the signal having a frequency odd-multiple times (for example, three times) as high as that of the Lo signal which is the fundamental wave of the passing radio frequency signal.

Variable RF filter and wireless apparatus

A signal detection device includes: a band limiting filter in which cutoff frequency is changeable; a signal detection unit that detects whether or not a signal of a specific frequency is present, from a received signal; and a control unit that executes a first signal detection that causes the signal detection unit to detect a signal, with a cutoff frequency of the band limiting filter less than the Nyquist frequency of an A/D converter, and a second signal detection that causes the signal detection unit to detect a signal, with a cutoff frequency of the band limiting filter greater than or equal to the Nyquist frequency of the A/D converter.

Growing community of inventors

Tokyo, Japan

Naoki Oshima