Daisuke Ogawa
Daisuke Ogawa, Kawasaki JP
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20080268782 | Receiving device and communication system - A receiving device and a communication system wherein the frequency usage efficiency is raised to improve the communication throughput. The receiving device comprises a receiving unit that receives multicarrier signals in which a plurality of subcarriers are divided into a plurality of subcarrier blocks (frequency blocks) each including at least one subcarrier and in which signals to be transmitted to receiving devices are allocated on a subcarrier block basis; an estimating unit that estimates, for each of the subcarrier blocks, quality values indicative of the reception statuses of the signals allocated to the plurality of subcarrier blocks; and a notifying unit that notifies a transmitting device of information indicative of a high quality subcarrier block having a high quality value in the quality values, a quality value in the high quality subcarrier block, and an interval of the subcarrier blocks having the quality value of which a difference from the quality value in the high-quality subcarrier block falls within a predetermined threshold value. | 10-30-2008 |
20100124299 | METHOD FOR MIMO DECODING, APPARATUS FOR MIMO DECODING, AND MIMO RECEIVER - There is provided a method for MIMO decoding, based on a channel estimated value between a plurality of transmitting antennas and a plurality of receiving antennas, a received signal received by the plurality of receiving antennas, including: in obtaining a unitary matrix Q and a triangular matrix R through QR decomposition of a channel estimated value matrix H, creating the triangular matrix R such that a sum of scalars of non-diagonal elements of the triangular matrix R is the minimum; and estimating a signal transmitted from the plurality of transmitting antennas through the use of the created triangular matrix R, the unitary matrix Q, and the received signal received by the plurality of receiving antennas. | 05-20-2010 |
20110075743 | RECEIVER, COMMUNICATION SYSTEM, AND CHANNEL ESTIMATION METHOD - A receiver includes a channel estimation unit that calculates channel estimation values of symbols containing pilot signals from signals transmitted by a plurality of antennas to obtain channel estimation values of symbols in the same positions of the antennas, a de-precoding unit that de-precodes the channel estimation values of the antennas calculated by the channel estimation unit to calculate effective channel estimation values, and a time-direction interpolation unit that performs time-direction interpolation using the effective channel estimation values calculated by the de-precoding unit to calculate effective channel estimation values of symbols other than the symbols containing pilot signals. | 03-31-2011 |
20120170627 | WIRELESS COMMUNICATIONS SYSTEM AND APPARATUS - In a wireless communication apparatus, an index value control unit transmits, to a different wireless communication apparatus, index values which indicate precoding matrices for use in precoding of the different wireless communication apparatus, and a deprecoding unit performs deprecoding using precoding matrices corresponding to index values transmitted in the past, wherein the index value control unit transmits, at each transmission timing, the index values generated based on a result of channel condition measurement for entire or some sub-frequency bands of a predetermined frequency band, the count of the index values being less than that of the entire sub-frequency bands, and the deprecoding unit selects one of the index values transmitted in the past, according to the time or frequency of a data block for which no index value is transmitted, and performs deprecoding for the data block using the selected index value. | 07-05-2012 |
20120196634 | WIRELESS COMMUNICATION SYSTEM, MOBILE TERMINAL AND COLLABORATIVE COMMUNICATION METHOD - A first base station receives from a mobile terminal identification information indicating a combination of a weight coefficient for the first base station and a weight coefficient for a second base station, transfers the received identification information to the second base station, and performs precoding of a data signal to be transmitted to the mobile terminal by collaborative transmission, by using the weight coefficient for the first base station identified by means of latest identification information. The second base station receives the identification information from the first base station, and performs precoding of a data signal to be transmitted by collaborative transmission, by using the weight coefficient for the second base station identified by means of identification information obtained as latest identification information and different from that for the weight coefficient for the first base station used for precoding of the data signal. | 08-02-2012 |
Daisuke Ogawa, Kanagawa JP
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20100322556 | WAVEGUIDE TYPE OPTICAL DEVICE - An arrayed waveguide grating optical multiplexer/demultiplexer according to the present invention including an input channel waveguide, an input slab waveguide, an arrayed waveguide, a polarization dependence eliminating means, an output slab waveguide, a temperature compensating means, and an output channel waveguide is characterized in that the temperature compensating means compensates for the temperature dependence of the optical path lengths in the channel waveguides of the arrayed waveguide, and the polarization dependence eliminating means eliminates the temperature dependence and the polarization dependence of the arrayed waveguide grating optical multiplexer/demultiplexer at the same time. | 12-23-2010 |
20110110629 | PLANAR OPTICAL WAVEGUIDE - A planar optical waveguide including a clad layer, an optical waveguide having a core embedded in the clad layer; and a groove formed in the clad layer and having a reflection interface for totally reflecting a leaked light leaked from the optical waveguide to the clad layer. Since the reflection interface for totally reflecting the leaked light is formed in the clad layer, the leaked light is prevented from entering into the tap coupler, and the variation of the branching ratio can be reduced. | 05-12-2011 |
Daisuke Ogawa, Aichi JP
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20100024117 | SAUNA DEVICE - To provide a sauna device having a small number of components without any special heat source, operable at a low running cost, and capable of turning a sauna room into a high humidity space with low noise. The sauna device has a heating/humidifying unit for heating/humidifying air, a ventilating unit for exhausting the air in the sauna room, and a control unit for controlling the heating/humidifying unit and the ventilating unit. The heating/humidifying unit has a heating section for heating the air through a circulation blowing section for circulating the air in the sauna room and a humidifying section for humidifying the heated air having passed through the heating section. The humidified air is blown out into the sauna room through the humidifying section. A bent portion where the air-blowing duct through which the humidified air having passed through the humidifying section passes is bent is provided. | 02-04-2010 |
Daisuke Ogawa, Nagoya-Shi JP
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20080303364 | Driving Force Transmission Mechanism, Image Forming Apparatus and Assembling Method Thereof - To provide a driving force transmission mechanism in which the thickness can be reduced as well as the positioning between a driven shaft and driven, and a motor shaft of a motor is easy. The driving force transmission mechanism of the invention comprises a plate through which a reference hole is pierced, a driven shaft vertically standing with respect to an inner surface on the side of the inner surface of the plate, a driven gear pivotally provided around the driven shaft, a bracket fixed to the plate so as to cover the reference hole on the side of the inner surface of the plate, and a stepping motor protruding a motor shaft toward the reference hole, being fixed to the bracket. The motor shaft is positioned through the reference hole with driving tooth formed at the motor shaft to be directly engaged with the driven gear. | 12-11-2008 |
20090269113 | Image Forming Apparatus - An image forming apparatus includes an image forming unit including an image carrier carrying a developer image to form an image by transferring the developer image onto a recording sheet at an image forming position, a recording sheet accommodating unit, a feeding path, a conveyance roller provided in the feeding path for conveying the recording sheet to the image forming position, a discharge path that guides the recording sheet to an outside, a discharge roller being rotatable normally and reversely and discharging the recording sheet to the outside by rotating normally, and a reverse feeding path, by which the recording sheet is guided when the discharge roller reversely rotates, and which reverses the recording sheet so as to guide the recording sheet to be joined again with the feeding path. The reverse feeding path is joined with the feeding path between the image carrier and the conveyance roller. | 10-29-2009 |
Daisuke Ogawa, Nagoya JP
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20080304861 | Image Forming Device - An image forming device includes a driving mechanism that transmits a driving force to a process cartridge through an input portion of the process cartridge. The driving mechanism includes a drive shaft shifting between a state engaging with the input portion and a state spaced from the input portion, a first cam joined with a door to be rotated with movement of the door, the first cam including a first sliding surface, a translation member including a sliding contact portion which slidably contacts the first sliding surface, the translation member being configured to engage with the drive shaft and shift together with the drive shaft with the sliding contact portion sliding on the first sliding surface with rotation of the first cam, and a second cam including a second sliding surface which slidably contacts the sliding contact portion to face the first sliding surface through the sliding contact portion. | 12-11-2008 |
Daisuke Ogawa, Nagano JP
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20110112354 | ARTIFICIAL HEART CONTROL DEVICE, ARTIFICIAL HEART SYSTEM AND ARTIFICIAL HEART CONTROL METHOD - Provided is an artificial heart control device for controlling a blood pump which assists flow of blood in a heart, the artificial heart control device including: a timing detection part which is configured to detect reference timing within a cardiac cycle of the heart; and a blood pump control part which is configured to control a rotational speed of the blood pump, wherein the blood pump control part controls, with reference to the reference timing detected by the timing detection part, the rotational speed of the blood pump such that the rotational speed becomes a rotational speed corresponding to a predetermined control pattern. According to the present invention, it is possible to provide an artificial heart control device, an artificial heart system and an artificial heart control method which can provide a load control optimum for the recovery of functions of a patient's own heart. | 05-12-2011 |
20120142998 | ARTIFICIAL HEART DEVICE - An artificial heart device includes: a blood pump which assists flow of blood in a heart; a blood pump control part which controls the blood pump; a first data processing part which performs first data processing on at least one data in a first period out of operation data on the blood pump, operation data on a cool sealing unit which circulates lubrication fluid in the blood pump, biological data corresponding to a state of a patient and operation data on a battery; and a TR data storing part which stores data after the first data processing in association with date-and-time data corresponding to date and time at which the data is stored each time the first period elapses, wherein the data stored in the TR data storing part is retrievable. | 06-07-2012 |
Daisuke Ogawa, Nobi JP
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20120236832 | TRANSMISSION STATION, RECEIVING STATION, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A transmission station includes a communication section configured to perform transmission and reception of data with a receiving station by using a plurality of wireless carriers whose frequency bands differ from one another, and a processor configured to obtain reception qualities of a plurality of wireless carriers which are reported from the receiving station, and configured to assign a gap for each of the wireless carriers, in accordance with the obtained reception quality of the each of the wireless carriers, the gap being a period over which transmission of the data is stopped. | 09-20-2012 |
Daisuke Ogawa, Yokosuka JP
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20130044800 | WIRELESS DEVICE AND COMMUNICATION CONTROL PROGRAM - A wireless device includes a channel covariance matrix calculating unit that calculates a covariance matrix based on a channel matrix estimated based on radio signal transmitted from a transmitting station. The wireless device further includes a first metric calculating unit that calculates a first metric based on the calculated covariance matrix. The wireless device further includes a W | 02-21-2013 |
20130064203 | TRANSMITTER, RECEIVER, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A communication system, etc. are provided that can prevent the accuracy of propagation channel estimation from degrading when performing radio communications based on OFDM by using a plurality of carriers each with a predetermined bandwidth. Radio communications based on an OFDM scheme are performed between a transmitter and a receiver by using a carrier with a prescribed bandwidth in which first signals such as reference signals, for example, are arranged at constant subcarrier intervals. The transmitter, when performing communications with the receiver by using a plurality of such carriers, transmits to the receiver an OFDM signal in which the first signals are arranged at predetermined subcarrier intervals across the plurality of carriers. The receiver extracts the first signals from the OFDM signal received from the transmitter. | 03-14-2013 |
20130301592 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - In a radio communication apparatus a configuration section sets transmission bands and receiving bands in a band group. A configuration control section controls the configuration section so that each of the receiving bands is not included between the transmission bands in the band group. In a radio communication apparatus a filter section includes a filter which can extract transmission bands lumped together. When a band group which is transmitted from the radio communication apparatus and in which setting is performed so that each of receiving bands is not included between transmission bands is received, a filter control section controls the filter section so as to extract the transmission bands from the received band group. | 11-14-2013 |
20140092764 | RECEPTION DEVICE AND RECEPTION METHOD - A reception device includes: an RF circuit configured to receive a first signal transmitted from a first transmission device; and a processor configured to: determine whether at least one symbol of the first signal has a probability of receiving interference from a second signal transmitted from a second transmission device, and measure a reception quality based on a known signal mapped to a symbol other than the at least one symbol determined to have the probability of receiving the interference from the second signal, the known signal being among known signals mapped to symbols of the first signal. | 04-03-2014 |
20140179262 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - A radio communication apparatus including: an antenna configured to receive a frame including reference signals and including other signals corresponding to radio resources to which channels are mapped, and a processor configured to acquire degree of usage of the radio resource, to calculate a reception quality of the reference signals, and to adjust the reception quality in accordance with the degree. | 06-26-2014 |
Daisuke Ogawa, Kasugai-Shi JP
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20130142597 | Article Transport Facility - An intermediate transfer device is located upwardly of an article delivering and receiving portion and downwardly of a ceiling transport vehicle. A transfer device grip is provided such that the intermediate transfer device is in vertical alignment with the ceiling transport vehicle and the article delivering and receiving portion and is capable of traveling, while guided and supported by a guiding support, to and among a transfer position for the delivering and receiving portion, a transfer position for the intermediate rack, a transfer-time retracted position, and a temporary-storage-time retracted. The guiding support is configured to form a space through which the grip portion and an article can pass in the vertical direction when the ceiling transport vehicle transfers the article. | 06-06-2013 |
20130195588 | Article Transport Facility - Disclosed is an article transport facility in which reduction in the transport capacity can be prevented while simplifying the structure and making the facility less expensive. The facility includes, as travel paths, a first travel path and a second travel path which straddles the first travel path from one side to the other side in a lateral direction of the first travel path. In a straddling portion, which is a part of the second travel path that straddles the first travel path, the second travel path is provided at a different height from the first travel path in a vertical direction, and is configured such that travel of the article transport vehicle along the first travel path and travel of the article transport vehicle along the second travel path are mutually allowed. | 08-01-2013 |
Daisuke Ogawa, Komaki-Shi JP
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20130213755 | Article Transport Facility - An article transport facility in which driving electric power can be supplied from an electricity supply line to an article transport vehicle so that it can travel through a crossing portion properly regardless of whether it is traveling along a first path or a second path. The switching device of the article transport facility is configured to switch a position change rail to a first position and a second position. The electricity supply line is supported by a first travel rail such that electric power can be supplied to the article transport vehicle traveling along the first travel rail and along the position change rail in the first position and is supported by the second travel rail such that electric power can be supplied to the article transport vehicle traveling along the second travel rail and along the position change rail in the second position. | 08-22-2013 |
20130313070 | Article Transport Facility - A travel guide member which forms travel paths for an article transport vehicle is provided on a ceiling side. The travel guide member defines a plurality of travel paths along which the article transport vehicle travels in the same direction such that the travel paths are spaced apart from each other in a path lateral direction and defines a first diverging path and a second diverging path for connecting with each other a first travel path that is one of a pair of adjacent travel paths among the plurality of the travel paths and a second travel path that is the other of the pair of the adjacent travel paths. The first diverging path and the second diverging path are formed such that both extend in directions that are slanted with respect to the travel path in plan view and such that they intersect each other in plan view. | 11-28-2013 |
Daisuke Ogawa, Gyoda City JP
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20130114264 | IRRADIATION DEVICE - one spectrum correction filter that changes a spectral characteristic of emission light from the light source, at least one neutral density filter disposed on the same optical axis of the spectrum correction filter, wherein the at least one spectrum correction filter and/or the at least one neutral density filter is tilted so that a travel direction of reflection light reflected from the at least one spectrum correction filter is deviated from the optical axis. | 05-09-2013 |
Daisuke Ogawa, Osaka JP
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20150210093 | PRINTER - A printer including: a feed portion into which a medium is inserted; and a second feed tray pivoting between a first position and a second position. In the printer, both when the second feed tray is at the first position and when the second feed tray is at the second position, a feed opening of the feed portion is exposed from a direction in which the medium is inserted. | 07-30-2015 |