Kabushiki Kaisha Toshiba

International Semiconductor Group

Toshiba Electronic Devices & Storage Corporation

Tsuguhide Aoki

Yasuhiko Tanabe

Daisuke Takeda

Tomoko Adachi

Toshihisa Nabetani

Ryoko Matsuo

Ren Sakata

Takahiro Kobayashi

Ichiro Seto

Shuichi Obayashi

Yoshimasa Egashira

Kiyoshi Toshimitsu

Hiroki Mori

Hiroki Shoki

Mutsumu Serizawa

Syuichi Sekine

Takehiko Toyoda

Tomoya Tandai

Hiroshi Yoshida

Kazumi Sato

Kohsuke Harada

Hironori Uchikawa

Hiroshi Tsurumi

Yuji Tohzaka

Tadashi Matsumoto

Tetsu Nakajima

Hideo Kasami

Kentaro Taniguchi

Masahiro Sekiya

Koji Yamamoto

Kohei Onizuka

Tsuyoshi Kogawa

Hidehiro Matsuoka

Fengming Cao

Yutaka Matsumoto

Katsuya Nounin

Masahiro Morikura

Takayuki Nishio

Rudzi Dziyauddin

Kiyonori Takahashi

According to one embodiment, a wireless communication device includes a receiver configured to receive a plurality of first frames which are transmitted by multiplexing; and a transmitter configured to transmit a second frame containing check results indicating whether the plurality of first frames are successfully received and first information specifying at least one wireless communication device. The receiver is configured to receive a plurality of third frames transmitted by multiplexing in response to the second frame.

Wireless communication device

According to one embodiment, a wireless communication device includes: a receiver configured to receive a plurality of first frames transmitted by spatial multiplexing; and a transmitter configured to transmit a second frame containing check results indicating whether the first frames are successfully received and first information specifying at least one communication device. The receiver is configured to receive a plurality of third frames transmitted by spatial multiplexing from a communication device having transmitted the first frame the check result of which represents failure and the communication device specified in the first information.

Wireless communication device and wireless communication method

A wireless communication device includes a transmitter and a receiver. The transmitter transmits a first frame containing notification information to specify first and second wireless terminals and a second frame for channel estimation. The receiver receives a third frame transmitter from the first wireless terminal and a fourth frame transmitted from the second wireless terminal. The third frame and the fourth frame are transmitted in a multiplexing scheme by the first and the second wireless terminals. The third frame contains first channel information estimated based on the second frame. The fourth frame contains second channel information estimated based on the second frame. The first frame contains at least either information to specify a preamble of the third frame and a preamble of the fourth frame or information to specify a subcarrier used for transmission of the third frame and a subcarrier used for transmission of the fourth frame.

According to one embodiment, an electronic apparatus includes a receiver, a processor and a transmitter. The receiver receives a reception signal including a value indicating a physical quantity related to operation of a control target object at a communication destination. The processor determines a state of wireless communication between the electronic apparatus and the communication destination. The processor calculates a target value for instructing operation of the control target object. The processor generates a transmission signal including a value obtained by modifying the target value. The transmitter transmits the transmission signal to the control target object.

Electronic apparatus and method

According to one embodiment, a wireless communication device includes: a communicator and controlling circuitry. The communicator is configured to simultaneously communicate a first frame and a second frame, and after the first frame and the second frame are communicated, communicate a third frame indicating acknowledgement of the first frame and a fourth frame indicating acknowledgement of the second frame. The controlling circuitry is configured to control to prevent the third frame and the fourth frame from being simultaneously communicated.

A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas, wherein a signal generator generates wireless packet including a short-preamble sequence used for a first automatic gain control (AGC), a first long-preamble sequence, a signal field used for conveying a length of the wireless packet, an AGC preamble sequence used for a second AGC to be performed after the first AGC, a second long-preamble sequence, and a data field conveying data. The AGC preamble sequence is transmitted in parallel by the plurality of antennas.

Wireless transmitting and receiving device and method

An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus which transmits OFDM signals by using a plurality of transmission antennas includes a subcarrier setting device which sets signals for subcarriers so as to use some of the subcarriers of the OFDM signals as pilot subcarriers to transmit pilot signals and use the remaining subcarriers as data subcarriers to transmit data signals, the subcarrier setting device changing polarities of signals for the pilot subcarriers for each transmission antenna.

OFDM signal transmission method and apparatus

Growing community of inventors

Kawasaki, Japan

Tsuguhide Aoki