Sharp Kabushiki Kaisha Corporation

Towa Chemical Industry Co., Ltd.

Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Other

Tokyo Institute of Technology

Nitto Boseki Co., Ltd.

Osaka Prefecture University Public Corporation

Tsubakimoto Chain Company

Nikko Rica Corporation

Suyama, Satoshi

Suzuki, Hiroshi

Fukawa, Kazuhiko

Naoki Okamoto

Yoshiaki Tateno

Ryota Yamada

Mitsuo Magara

Hiroshi Suzuki

Minoru Kubota

Takashi Onodera

Takashi Yoshimoto

Satoshi Suyama

Kazuhiko Fukawa

Tomozo Ohta

Masao Miyazaki

Minoru Takeuchi

Minoru Nagasawa

Kazuaki Kato

Masaru Bunya

Takeshi Okamoto

Keiji Hikoso

Seiichi Sanpei

Koshiro Shimazu

Takao Ohshima

Hideki Sakamura

Susumu Yoneda

Hiroyuki Kohama

Maki Shibata

Kazuo Kondo

Norihiko Morinaga

Toshizo Nogami

Yasuhiro Hamaguchi

Kazuyuki Shimezawa

Hiroshi Nakano

Junji Ito

Norihide Kinugasa

Takayuki Morimoto

Kozue Hirata

Yoshibumi Ishii

Takeshi Misaku

Yusuke Nozaki

Masaru Fukusen

Chihaya Sano

Ryosuke Nanri

Kosuke Yabuki

Takeyasu Saito

Kotone Tanaka

Masaaki Fuse

Mochihiro Iljima

Motohiro Takemura

Shigeki Doi

Tsunehiro Nakamura

Yusuke Nakahashi

Hideyuki Kuri

Suzuki Hiroshi

Suyama Satoshi

Fukawa Kazuhiko

An object of the present invention is to provide a silent chain drive device that can minimize loss of strength and wear of link plates, as well as prevent the chain from lifting up to achieve better power transmission efficiency. The silent chain drive device includes a silent chain designed for inside flank meshing/inside flank seating, and a sprocket with sprocket teeth. The plurality of link plates in the silent chain, which each have a pair of teeth, are configured to make contact with the sprocket teeth only at the inside flanks of each pair of teeth when the silent chain wraps around the sprocket and meshes with all of the sprocket teeth.

Silent chain drive device

There is provided a method of well filling copper in a conductivity-rendered non-through hole having an aspect ratio (depth/hole diameter) of 5 or more on a substrate in a short period of time, and the method comprises using an acidic copper plating bath comprising a water-soluble copper salt, sulfuric acid, chlorine ion, a brightener and a copolymer of diallylamines and sulfur dioxide and filling copper in the non-through hole by periodic current reversal copper plating.

Copper filling-up method

A receiving device, a receiving method, and a receiving program are provided and are capable of reducing performance degradation in a case where the spatial correlation of a channel becomes high. A transmission signal candidate search unit searches for a transmission signal in a direction in which reception performance is degraded, in MIMO signal detection. A transmission signal candidate generation unit generates transmission signal candidates while suppressing degradation due to the spatial correlation of a channel. In a decision unit, using the transmission signal candidates generated in the transmission signal candidate generation unit, a maximum likelihood sequence is obtained. The maximum likelihood sequence is obtained as transmission signal candidates where a metric is calculated and the metric becomes a minimum.

Receiving device, receiving method, and receiving program

A wireless communication apparatus includes: a channel information acquiring unit that, acquires a transmitted signal channel matrix that is channel information as a transmitted signal of a pre-interference-removal transmitted signal group and an interference signal channel matrix that is channel information as an interference signal of the non-interference-removed transmitted signal group; an interference signal calculating unit that generates an interference signal group at the time of reception by the non-interference-removed transmitted signal group with respect to the pre-interference-removal transmitted signal group, based on the pre-interference-removal transmitted signal group, the non-interference-removed transmitted signal group, the transmitted signal channel matrix, and the interference signal channel matrix; a subtracting unit that subtracts the interference signal group from the pre-interference-removal transmitted signal group to generate a post-interference-removal transmitted signal group; and a transmission antenna group that transmits the post-interference-removal transmitted signal group and the non-interference-removed transmitted signal group from mutually different transmission antennas.

Wireless communication apparatus, wireless communication system, and communication method

Disclosed is a receiver in a communication system provided with one transmitting station or two or more transmitting stations and the receiver for reception from the transmitting stations. For a case where identical signals are sent from the one transmitting station or the two or more transmitting stations, the receiver includes a first demodulator which executes demodulation processing of the signals as a single signal group, a second demodulator which executes demodulation processing of the signals as multiple signal groups, a determination unit which discriminates between the single signal group and the multiple signal groups, and a control unit which controls which one of the first demodulator and the second demodulator is to execute the demodulation processing based on a determination result by the determination unit.

Receiver and receiving method

The low-noise amplifier with through mode is configured such that a source grounded transistor and a gate grounded transistor are connected in cascode, and a load impedance element and a switching transistor are serially connected between the drain of the gate grounded transistor and a power supply, and a through pass circuit is connected between an input terminal and an output terminal. The gate voltage of the gate grounded transistor is regulated by a bias circuit and the voltage of a mode control terminal is converted by a level shifter to control the gate voltage of the switching transistor, whereby, in the case of using only transistors whose terminal-to-terminal breakdown voltages are each equal to or less than the power supply voltage, it becomes feasible to prevent voltages equal to or more than the terminal-to-terminal breakdown voltages from being applied between the terminals of each transistor.

Low-noise amplifier with through-mode

A receiver apparatus receiving a quadrature-modulated, modulated wave, includes: a real-zero signal generator for adding a sinusoidal wave to the modulated wave to generate a real-zero signal; an in-phase and quadrature component detector for extracting an in-phase component signal and a quadrature component signal from the real-zero signal; a real-zero sequence generator for generating a real-zero sequence as a sequence of time points at which the in-phase component and quadrature component signals become zero; and a signal reconstruction unit for reproducing the in-phase component and quadrature component from the real-zero sequence. It is possible to provide a receiving apparatus that enables decoding of a received signal with high precision even when sufficient linearity cannot be secured in the analog circuit of the receiver apparatus.

Receiver apparatus, communication system, reception method and communication method

In an amplifier with pass-through mode of the present invention, in a pass-through mode, a signal transmission transistor and a bias control transistor are turned ON and a voltage of an output terminal is maintained in a ground potential via the bias control transistor and a resistor. Thus, a power supply voltage is applied to a control terminal of the signal transmission transistor and one main terminal of the signal transmission transistor is maintained in a ground potential. Therefore, an ON-resistance of the signal transmission transistor is decreased to a minimum level.

Amplifier with pass-through mode

To obtain maximum throughput in accordance with characteristics of a propagation path, a radio transmission device having a plurality of transmitting antennas () for transmitting a transmission signal in units of sub-carriers by performing spatial multiplexing or without performing spatial multiplexing is provided that includes a sub-carrier modulation partmodulating the input transmission signal for each sub-carrier, a transmission signal allocation partallocating the transmission signal modulated for each of the sub-carriers to each of the transmitting antennas, and a transmission control partthat determines a multiplexing number for performing spatial multiplexing for each sub-carrier based on information received from another radio communication device as an opposite party, and outputs the determined multiplexing number to the sub-carrier modulation part and the transmission signal allocation part.

Radio transmission device

A low-noise amplifier comprises an input terminal to which a signal is input; a transistor configured to amplify the signal input to the input terminal; an output terminal through which the amplified signal from the transistor is output; a feedback amount regulator circuit configured to regulate an amplitude of the signal output from the transistor as a feedback amount and output a voltage; a bias circuit configured to generate a bias current fed to the transistor; a differential voltage comparator configured to compare the voltage output from the feedback amount regulator circuit to a reference voltage, determine whether or not a level of the signal input to the input terminal is a level at which a gain of the transistor is suppressed, and increase the bias current fed to the transistor when the differential voltage comparator determines that the level of the signal input to the input terminal is the level at which the gain of the transistor is suppressed; a first input bias circuit configured to generate the reference voltage and apply the reference voltage to one input end of the differential voltage comparator; and a second input bias circuit configured to add a bias voltage to the voltage output from the feedback amount regulator circuit and apply the voltage added with the bias voltage to the other input end of the differential voltage comparator.

Low-noise amplifier

Data errors are sufficiently corrected and desired transmission quality is obtained even when the time variation of fading is large in a multicarrier transmission scheme communication system to which HARQ is applied. A transmission apparatusis applied to a communication system in which the transmission apparatus and a reception apparatus perform automatic repeat request control therebetween, and has a subcarrier spacing setting sectionthat sets the subcarrier spacing used in transmitting a retransmission signal to be larger than the subcarrier spacing used in transmitting a first transmission signal, an IFFT sectionthat performs IFFT (Inverse Fast Fourier Transform) on an input signal based on the subcarrier spacing set in the subcarrier spacing setting section, and a transmission sectionthat transmits the first transmission signal and at least one retransmission signal.

Transmission apparatus, reception apparatus, communication system, transmission method and reception method

A method of filling copper in a non-through hole on a substrate that has been treated to render it conductive, which comprises plating said substrate in an acidic copper plating bath comprising a water-soluble copper salt, sulfuric acid and a filling additive that is a polymer having the activities of both of a brightener and a leveler.

To generate notification information for improving accuracy of channel quality information reconstructed based on a difference in notifying using the difference in channel quality information between channels. A notification information generating apparatushas a notification information tablethat stores a plurality of difference-value candidate values each indicating a difference between two pieces of channel quality information as candidate values for the notification information, a reconstructing sectionthat generates a reconstruction value using the notification information generated based on the channel quality information of a first channel, and a selecting sectionwhich receives the channel quality information of a second channel differing from the first channel, selects a single candidate value from the candidate values for the notification information based on the channel quality information of the second channel and the reconstruction value, and generates the notification information based on the selected candidate value.

Notification information generating apparatus, communication apparatus, notification information generating method and program

To obtain excellent reception performance while cutting down the amount of computing operation in a MIMO communication system using soft-decision error correction coding. Received waves picked up by receiving antennas-to-R are converted from the radio frequency to the baseband signal by respective receivers-to-R to be output as a received signal. A signal detectorcalculates bit LLRs of the transmitted signal based on the received signal and the channel-estimated values obtained from a channel estimator. The bit LLRs output from signal detectorare rearranged by deinterleaver units-to-T in the patterns opposite to the patterns in which interleaving was performed on the transmission side. The bit LLRs after de-interleaving are subjected to an error correction decoding process through decoders-to-T. The bit sequences after decoding are parallel-to-serial converted by a parallel-to-serial converterso that the detected transmission bit sequence is output.

Receiving apparatus, receiving method and communication system

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Osaka, Japan

Naoki Okamoto