Fujitsu Corporation

Adv Antest Corporation

Toshiba Storage Device Corporation

Fujitsu Llimited

Kazuyuki Ozaki

Soichi Hama

Akio Ito

Hiroshi Fujita

Yoshiro Goto

Makoto Yoshida

Sumio Kuroda

Hiroyasu Kawano

Yun Wen

Masakazu Taguchi

Akiyoshi Uchida

Yuuta Nakaya

Akira Fujii

Shingo Hamaguchi

Yasutoshi Umehara

Kenichi Nishikawa

Kazuhiro Nakazawa

Yoko Sato

Masahiko Shimizu

Satoshi Shimokawa

Kiyoto Matsui

Akinori Miyamoto

Toshiaki Nagai

Shinichi Wakana

Yoshiaki Ogiso

Shin-ichi Wakana

Koji Matsumoto

Yoji Ohashi

Ken Tamanoi

Koichi Iida

Mineo Moribe

Hirotaka Oshima

Kaoru Yokoo

Yuzuru Yamakage

Tadahiro Sato

Kazuo Okubo

Shinichiro Kobayashi

Yasuharu Amezawa

Takayoshi Nakayama

Toshihiro Ishizuka

Hiroshi Okagawa

Shunsuke Fujio

Yusuke Furuumi

Kazuo Ookubo

Katsuhiko Tsujihata

Kazunori Sato

Kunifumi Tamachi

Hiroo Urabe

A radio communication apparatus includes a plurality of antennas, a radio transmission unit configured to execute radio transmission processing on data to be transmitted from the plurality of antennas, and a processor connected to the radio transmission unit. The processor executes a process including acquiring beam group specification information that specifies a beam group that is capable of being formed when the data to be transmitted is transmitted, forming at least one beam included in the beam group, and correcting an envelope of a beam group using correction factors, the beam group including the at least one beam formed, the correction factors corresponding to the beam group specification information.

Radio communication apparatus and radio transmission method

A channel assignment apparatus includes an interfered amount processing unit that represents a value group by a symmetric matrix, the value group including, as an element, an amount of interference that occurs in each of wireless access points, performs a row exchange and a column exchange in the symmetric matrix based on magnitude of the amount of interference, and generates one of the upper triangular matrix and the lower triangular matrix from the symmetric matrix in which the row exchange and the column exchange are performed, an assigning unit that assigns a frequency channel to each of the wireless access points by using one of the upper triangular matrix and the lower triangular matrix in accordance with a predetermined algorithm for selecting an optimal assignment candidate corresponding to the magnitude of the amount of interference from among a plurality of assignment candidates for the frequency channel.

Channel assignment apparatus, wireless communication system, and channel assignment method

A wireless power transfer system includes a first transmitter coil, a second transmitter coil and a third transmitter coil arranged such that normal directions to planes of the first, the second and the third transmitter coils are orthogonal to each other in a three-dimensional space, and a controller that controls electric currents supplied to the first, the second and the third transmitter coils such that a synthetic magnetic field vector produced by the first, the second and the third transmitter coils rotates in a plane of rotation at a first angular frequency '&#x3c9;', and that a normal vector to the plane of rotation rotates about an axis of rotation perpendicular to the normal vector at a second angular frequency 'a' equal to or smaller than the first angular frequency (a&#x2264;&#x3c9;).

Wireless power transfer system and wireless power transfer method

A rechargeable battery includes: a battery body including a cylindrical outer peripheral side surface; and a power receiving coil wound in at most a single layer around the outer peripheral side surface, and electrically connected to the battery body. The power receiving coil is helically wound around the outer peripheral side surface while forming a space from which the outer peripheral side surface is exposed.

Rechargeable battery, charging system, and electronic device

A transmission method executed by a transmission device, the transmission method including performing a plurality of transmitting processes in accordance with a plurality of transmitting patterns, each of the plurality of transmitting processes including transmitting a plurality of signals for a plurality of directions in parallel by forming a plurality of beams corresponding to the plurality of directions, each of the plurality of transmitting patterns being defined a combination of directions to be transmitted in parallel, receiving a result of a determining from a reception device, the determining including determining whether or not, for each of a plurality of receiving processes, the at least one signal satisfies a predetermined condition, each of the plurality of receiving processes including receiving at least one signal transmitted from the transmission device, and selecting a transmitting direction for the reception device from the plurality of directions based on a result of the determining.

Beamforming for selecting a transmitting direction based on feedback from a reception device

A wireless communication apparatus includes a plurality of phase adjusters configured to adjust the phase of a digital baseband signal dfor k=1, 2, . . . , K (K is a natural number equal to or larger than one) and output a plurality of digital signals d, d, d(m is a natural number equal to or larger than two) having phases different from each other, an i-th converter configured to convert a signal obtained by synthesizing the digital signals d, d, . . . , dinto an analog signal afor i=1, 2, . . . , m, and a power supply circuit including a first stage circuit, a second stage circuit, . . . , an N-th stage circuit (N is a natural number equal to or larger than one).

Wireless communication apparatus, antenna directionality control method, and power supply circuit

A wireless power transfer system includes a plurality of power sources and at least one power receiver, in which power transfer from the power sources to the power receiver is performed in wireless by using magnetic field resonance or electric field resonance. In the system, one of the plurality of power sources is designated as a master power source and the other one or more power sources are designated as slave power sources. In addition, the master power source controls the plurality of power sources and the at least one power receiver to perform the power transfer. This allows the system to perform the power transfer in an optimum state.

Wireless power transmission system and wireless power transmission method

The disclosed video processing device contains: a video acquisition unit that acquires surroundings information including video taken of the surroundings of a vehicle; a line-of-sight acquisition unit that acquires the origin and direction of the line of sight of the driver of the aforementioned vehicle; a line-of-sight video generation unit which generates, from the surroundings information, line-of-sight video corresponding to the origin of the line of sight; a blocking-information computation unit that computes, on the basis of the origin of the line of sight, blocking information including video or a region of the body of the aforementioned vehicle that blocks the driver's line of sight; and a display-video generation unit that generates display video on the basis of the line-of-sight video and the blocking information.

Picture processing device and method

A wireless communication apparatus includes antenna elements, each receiving a first signal and a second signal, a first estimator that estimates first channel information of the first signal, a false signal generator that generates false signals that are equal in number to or greater in number than the number of the antenna elements, each of the false signals arriving from a unique direction that is different from a direction of arrival of the first signal, a weight generator that generates first weights, each being associated with a corresponding one of the false signals and forming a null in the direction of arrival of the first signal, a multiplier that multiplies a signals received by the respective antenna elements by the first weights to acquire weight-multiplied signals, and a second estimator that estimates second channel information of the second signal using the weight-multiplied signals.

Wireless communication apparatus, wireless communication system, and channel estimating method

A package structure includes a first member that surrounds a semiconductor device, a heat insulating material that surrounds an outer side of the first member, and a second member that surrounds an outer side of the head insulating material. The heat insulating material has a density and a thermal conductivity lower than those of the first and second members. The first member has a heat capacity larger than that of the second member.

Package structure

A power receiving apparatus includes a power reception circuit, a first member having a cylindrical shape, a power receiving coil disposed on a cylinder side surface of the first member and connected through wires to the power reception circuit, and a resonance coil configured to be freely movable along the cylinder side surface in a circumferential direction around a cylinder center axis of the first member, wherein the power receiving coil and the resonance coil are coupled to each other through electromagnetic induction.

Power receiving apparatus and power transmission system

A wireless communication system includes a plurality of wireless terminals. Each of transmitting terminals executes direct communication or indirect communication. The wireless communication system includes a first obtainer that obtains a reception side terminal number which is the number of the wireless terminals with which the receiving terminal is able to communicate directly, a second obtainer that obtains a transmission side terminal number which is the number of the wireless terminals with which the transmitting terminal is able to communicate directly for each of a target transmitting terminal and a neighboring transmitting terminal, and a setter that selects one of the direct communication and the indirect communication based on the reception side terminal number, the transmission side terminal number for the target transmitting terminal, and the transmission side terminal number for the neighboring transmitting terminal, and executes the selected communication.

Wireless communication system, wireless communication method, and transmitting terminal

A wireless communication system constitutes a wireless ad hoc network. A plurality of wireless terminals include a receiving terminal and a plurality of the transmitting terminals. Each of the transmitting terminals executes direct communication or indirect communication. The wireless communication system includes a first obtainer that obtains a reception side terminal number which is the number of the wireless terminals with which the receiving terminal is able to communicate directly, a second obtainer that obtains a transmission side terminal number which is the number of the wireless terminals with which a target transmitting terminal, which is one of the plurality of transmitting terminals, is able to communicate directly, and a setter that selects one of the direct communication and the indirect communication based on the reception side terminal number and the transmission side terminal number, and sets the target transmitting terminal so as to execute the selected communication.

Wireless communication system, wireless communication method, transmitting terminal, and receiving terminal

In a gateway (GW), when interference is detected by an interference detection unit, a frame generation unit sends an interference broadcast signal. A terminal receives the interference broadcast signal sent at a maximum transmission power from the GW to which the terminal belongs. The interference broadcast signal includes information on a planned transmission power value that is a transmission power value of a data signal in the GW and is smaller than the maximum transmission power value. The interference broadcast signal is sent at the maximum transmission power value.

Multi-hop communication terminal, multi-hop communication system, and multi-hop communication method

A wireless communication apparatus includes: an estimating section to estimate a positional relationship between a destination node and a node; a first determination section to set an electric power larger than or equal to minimum power as a first transmission power if the node is estimated to be located in a first area, the minimum power being detected by a node at the largest distance from the node in the first area; a second determination section that set an electric power smaller than a minimum power as a second transmission power if the node is estimated to be located in an area other than the first area, the minimum power being detected by the destination; and a transmitting section to transmit data to the destination node with the first transmission power or the second transmission power.

Wireless communication apparatus and method for wireless communication

Growing community of inventors

Kawasaki, Japan

Kazuyuki Ozaki