Kabushiki Kaisha Toshiba

Ricoh Company, Ltd.

Suzumo Machinery Co., Ltd.

Daisuke Takeda

Tsuguhide Aoki

Yasuhiko Tanabe

Takahiro Kobayashi

Tomoko Adachi

Yoriko Utsunomiya

Ren Sakata

Tetsu Nakajima

Yoshimasa Egashira

Tomoya Tandai

Masahiro Takagi

Yasuyuki Nishibayashi

Ichiro Seto

Takehiko Toyoda

Manabu Mukai

Kazumi Sato

Jun Mitsugi

Shun-ichi Kubo

Kiyoshi Toshimitsu

Hironori Uchikawa

Takashi Wakutsu

Takeshi Tomizawa

Kohsuke Harada

Kaoru Inoue

Koji Ogura

Hiroki Shoki

Mutsumu Serizawa

Hiroki Kudo

Masahiro Sekiya

Toshiyuki Nakanishi

Noritaka Deguchi

Katsuya Nounin

Minako Suzuki

Tatsuhisa Furukawa

Hiroyuki Nakaya

Tsughide Aoki

Rice sheet machine

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

There is provided a personal information collection system comprising: an image reading unit configured to read an image of a document including personal information; an image dividing unit configured to divide a part of the image of the document corresponding to the personal information into a plurality of divided images; a correspondence management unit configured to manage correspondence relation between the divided images and an original image that is the part of the image of the document before being divided; a data entry unit configured to accept data input based on a visual observation of the divided images; and a connection unit configured to connect the input data based on the correspondence relation.

Personal information collection system, personal information collection method and program

There is provided a radio power transmitting apparatus including: a power transmitting coil, a band signal generating unit, a reflected signal measuring unit, an oscillator and a communication control unit. The coil is supplied with a signal and transmits the signal to a power receiving coil on a radio power receiving apparatus through magnetic coupling. The generating unit generates a band signal having an allowable transmission band and supplies the band signal to the power transmitting coil. The reflected signal measuring unit measures a reflected signal of the band signal from the power transmitting coil. The oscillator generates a carrier signal having a controllable oscillating frequency. The control unit determines a transmission frequency based on a frequency characteristic of the reflected signal and performs control so that a transmission signal generated by modulating the carrier signal of the transmission frequency is supplied to the power transmitting coil.

Radio power transmitting apparatus and radio power transmitting system

A receiving apparatus receives a digital modulation signal. The receiving apparatus has a receiving part for down-converting the digital modulation signal to a baseband signal and to obtain channel estimates, a channel estimation part for estimating a multi-path channel, a first replica generation part for generating a first replica, based on the channel estimates obtained by the channel estimation part, a first replica removal part for removing the first replica from a target frame in the baseband signal, a nulling part for forcefully nulling he baseband signal for at least a portion of the time period where an inter-frame interference occurs due to a delay wave having a delay time longer than the known signal, and a cyclic-addition part for performing cyclic-addition between a front side portion and a rear side portion in the target frame, including the portion nulled by the nulling part.

Receiving apparatus and receiving method

A wireless communication system includes first and second wireless terminals capable of performing transmission by at least one of a first transmission scheme and a second transmission scheme. The first wireless terminal performs transmission of a first frame to the second wireless terminal by using the second transmission scheme. The second wireless terminal communicates with the first wireless terminal to notify the first wireless terminal of information associated with a status of the reception of the first frame transmitted from the first wireless terminal by using the first transmission scheme.

Wireless communication system and wireless terminal

A communication apparatus which generates a single physical frame including a plurality of MAC frames, and which transmits the physical frame. The physical frame has variable-length bitmap information which includes bits corresponding to the plurality of MAC frames, respectively, and length information of the bitmap information. The communication apparatus can include a transmission scheme selecting device configured to select a transmission scheme of the physical frame to be transmitted as a response to the polling frame from a plurality of candidates in such a manner as to adapt to a channel estimate result estimated by the channel estimating device. The transmission scheme in this arrangement includes at least one of a modulation scheme and a coding ratio.

Communication apparatus, communication system and communication control program

A wireless communication apparatus includes an M-number of (M is an integer of 2 or more) receiving portions connected to respective antennas, a frame analyzing section configured to analyze a reception signal received by the M-number of receiving portions, and a selecting section configured to select a receiving portion to be in service from the M-number of receiving portions. The selecting section selects a P-number of (P is an integer of from 0 to M) receiving portions from the M-number of receiving portions, based on an analysis result obtained by the frame analyzing section.

Wireless communication apparatus and wireless communication system

Growing community of inventors

Kawasaki, Japan

Daisuke Takeda