Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Mitsubishi Electric R&d Centre Europe B.v.

Akinori Taira

Fumihiro Hasegawa

Shigeru Uchida

Hiroshi Nishimoto

Yoshitaka Hara

Hiroki Iura

Fumio Ishizu

Akihiro Okazaki

Keishi Murakami

Noriyuki Fukui

Ryoji Hayashi

Hiroyasu Sano

Noriharu Suematsu

Yoshihiko Konishi

Masataka Otsuka

Seiji Kozaki

Yasushi Sogabe

Kouji Tsutsumi

Mitsuru Mochizuki

Kazumasa Suzuki

Yukimasa Nagai

Tadahiro Shimoda

Cristina Ciochina

Takashi Asahara

Mari Ochiai

Kenichi Nakura

Takeshi Suehiro

Shusaku Umeda

Teruko Fujii

Takahisa Yamauchi

Shinji Masuda

Toshihisa Kamemaru

Masaaki Takeyasu

Tomoaki Otsuki

Cristina Ciochina-Duchesne

Akira Kurita

Kenji Suto

Kenji Sudo

Yasunori Katou

A wireless ranging system includes a ranging terminal that transmits a wireless signal including a ranging signal and a communication signal indicating an order of ranging with respect to a first ranging target terminal and a second ranging target terminal, and a first ranging target terminal and a second ranging target terminal that, when receiving the wireless signal, respectively transmits a first response signals and a second response signals consecutively a plurality of times to the ranging terminal. For each time the ranging terminal receives each of the plurality of response signals, the ranging terminal measures an elapsed time from transmission of the wireless signal, and calculates a relative distance between the ranging terminal and the ranging target terminals from a propagation time of each of the plurality of response signals calculated using the elapsed time.

Wireless ranging system

An on-board device in a control system in which frequencies used for transmitting and receiving a signal between the on-board device and an electronic key are known, and the electronic key transmits a response signal to a desired signal within a specified period when completing reception of the desired signal from the on-board device, the on-board device transmits the desired signal on a first frequency included in a specified frequency band; transmits a dummy signal on a second frequency included in the specified frequency band and different from the first frequency; receives the response signal to the desired signal from the electronic key; and controls to transmit the dummy signal in a period from before stopping transmitting the desired signal to after starting reception of the response signal.

On-board device, control system, control circuit, storage medium, and transmission control method

A base station includes: a control unit that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit; and a precoding unit and a transmitting unit that perform space-division multiplexing on signals of one or more layers arranged by the processing unit, and transmit the multiplexed signals.

Transmission device, communication system, and transmission method

A transmitting apparatus includes a first signal generating unit that generates, on the basis of data a first signal transmitted by single carrier block transmission; a second signal generating unit that generates, on the basis of an RS, a second signal transmitted by orthogonal frequency division multiplex transmission; a switching operator that selects and outputs the second signal in a first transmission period and selects and outputs the first signal in a second transmission period; an antenna that transmits the signal output from the switching operator; and a control-signal generating unit that controls the second signal generating unit such that, in the first transmission period, the RS is arranged in a frequency band allocated for transmission of the RS from the transmitting apparatus among frequency bands usable in OFDM.

Transmitting apparatus, receiving apparatus, transmitting method, and receiving method

A mobile apparatus according to the disclosure includes: a sensor unit to calculate a moving distance and a moving direction; a positioning unit to calculate a first current position by using positioning information for positioning provided in a calibration area that is among areas in which the positioning information is provided, the calibration area being the area in which first reliability representing accuracy of the positioning information is equal to or higher than a first threshold; a current position calculation unit to estimate a second current position by using the moving distance and the moving direction calculated by the sensor unit; and a calibration unit to calibrate a parameter to be used to estimate the second current position in the current position calculation unit, by using the first current position.

Mobile apparatus, map management apparatus, positioning system, control circuit, and recording medium

A transmission device according to the present invention includes a reference-signal information management unit as an identifier to identify an interfering terminal that is a possible terminal to perform communication interfering with communication with a target terminal that is a destination terminal of a data signal, and a transmitter to set a group ID for reference signal generation to a group formed by the interfering terminal and the target terminal.

Transmission device, receiving device, base station, terminal, and transmission method which improve interference estimation

When arranging a reference signal generated by a pseudorandom number on specified time and frequency, an information processing unit () determines whether or not to arrange a 1 OFDM symbol or 2 OFDM symbols including a reference signal at a position determined in each slot, and determines whether or not to additionally arrange an OFDM symbol including a reference signal in the same slot. A multiplexing unit () performs multiplexing of a reference signal in accordance with the determination by the information processing unit ().

Transmission device having processing circuitry to determine to arrange a OFDM symbol including a reference signal

The base station allocates, to one terminal, at least one transmission layer and allocates at least one resource block that is a minimum allocation unit of a communication resource in each transmission layer, to transmit a signal to the terminal, and includes processing units each associated with one of the transmission layers, the processing units being equal in number to the transmission layers. Each processing unit includes a reference signal generation unit to generate a reference signal to be used by the terminal in demodulation processing on a received signal, and an information processing unit to determine an arrangement of the resource block in which to transmit the reference signal to the terminal, based on at least one of a state of a channel between the base station and the terminal or information on the resource block to be used in transmission of the reference signal in an adjacent cell.

Transmitting apparatus and receiving apparatus

A lower base station according to the present invention includes: a CSI acquisition unit that acquires channel information indicating a channel state between the lower base station and one or more mobile terminals; a lower scheduler unit that transmits the channel information to a higher base station, and determines the number of signal streams and a modulation and coding scheme for a destination terminal that is a mobile terminal selected from among the one or more mobile terminals, based on the destination terminal and a data transmission rate for the destination terminal, sent for notification by the higher base station; and an MU-MIMO signal processing unit that performs Multi User-Multiple Input Multiple Output precoding for the mobile terminal.

Lower radio base station, higher radio base station, and radio base station system

Transmission device, receiving device, base station, terminal, and transmission method

The present invention relates to a method implemented by computer means of a communicating entity, for inserting a reference signal for phase tracking, said communicating entity using a discrete Fourier transformation spread orthogonal frequency division multiplexing modulator, characterized in that the method comprises: 

Reference signal for phase tracking insertion

A base station () according to the present invention includes: a control unit () that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit (-to-N) that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit (); and a precoding unit () and a transmitting unit () that perform space-division multiplexing on signals of one or more layers arranged by the processing unit (-to-N), and transmit the multiplexed signals.

Transmission device, communication system, and transmission method that configure positions of reference signals in frequency and time domains for each of a plurality of layers

A base station serving as a transmission apparatus includes a plurality of transmission antennas capable of forming beams directed to a plurality of terminals, which are reception apparatus, and a precoder configured to perform outer precoding on transmission signals transmitted from the plurality of transmission antennas. The plurality of terminals include at least one first reception apparatus, which are transmission destinations of the transmission signals, and second reception apparatus, which are reception apparatus other than the first reception apparatus. The precoder performs outer precoding on the transmission signals transmitted from the plurality of transmission antennas so that received power in the second reception apparatus among the plurality of reception apparatus is equal to or less than a threshold.

Transmission apparatus, reception apparatus, control station, communication system, and transmission precoding method

Growing community of inventors

Tokyo, Japan

Akinori Taira