Patent application number | Description | Published |
20100328414 | Optical Scanning Device and Image Forming Apparatus Equipped with the Same - An optical scanning device includes a light source for emitting first light beams, a deflecting unit that deflects the first light beams as second light beams having scanning lines that are substantially arc shaped, a scanning lens disposed in a light path of one of the second light beams, and a light-blocking member interposed between the deflecting unit and the scanning lens. The light-blocking member blocks reflected light generated from the one of the second light beams when the second light beam enters the scanning lens. The light-blocking member protrudes toward the second light beam path along at least a scanning area of the second light beam, and includes a protruding edge section curving in substantially a same arc shape as the scanning line. | 12-30-2010 |
20110116566 | WIRELESS COMMUNICATION SYSTEM, TRANSMITTER AND RECEIVER - According to the present invention, a transmitter includes: multiple antennas 15-1, 15-2; a DFT unit 04 configured to transform a time domain signal into a frequency domain signal; a cluster mapping unit 05 configured to divide the frequency domain signal into clusters and to assign the clusters to frequencies on the basis of cluster assignment information; an IDFT unit 06 configured to transform a mapped frequency domain signal into a time domain signal; and cyclic delay setting units 11-1, 11-2 configured to set, for the respective multiple antennas, a cyclic delay amount to the IDFT-transformed time domain signal. | 05-19-2011 |
20110200071 | WIRELESS COMMUNICATION SYSTEM, CONTROL STATION APPARATUS AND TERMINAL APPARATUS - To switch among access schemes of different systems efficiently, in a wireless communication system for selecting one access scheme from among a plurality of access schemes to perform wireless communications in between a control station apparatus and a terminal apparatus, the control station apparatus notifies the terminal apparatus of an access scheme using information indirectly designating the access scheme, and the terminal apparatus selects one access scheme from among a plurality of access schemes according to the notified information to perform wireless communications with the control station apparatus. | 08-18-2011 |
20110228815 | TRANSMISSION APPARATUS, RECEPTION APPARATUS AND COMMUNICATION SYSTEM - In SU-MIMO, even when the channel state of one antenna is poor, an error ratio is improved by obtaining a transmission antenna diversity effect. A transmission apparatus | 09-22-2011 |
20110242265 | FIXING MECHANISM OF OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS - A fixing mechanism of an optical scanning device, the optical scanning device emitting a light beam and performing a scanning, the optical scanning device further being fixed to a frame at an external part, the optical scanning device further including a housing, and the fixing mechanism including: a penetration hole provided in the frame; and a protruding pin provided at both ends of the housing thereby forming a plurality of protruding pins, wherein at least one of the plurality of protruding pins is insertable to the penetration hole formed in the frame; and a biasing member biasing the housing in a direction. | 10-06-2011 |
20110255624 | MULTIUSER MIMO SYSTEM, RECEIVER, AND TRANSMITTER - Even when respective transmitters use different transmission schemes, signals of the respective transmitters are separated. A receiver that is applied to a multiuser MIMO system in which a plurality of transmitters performs transmission to at least one receiver, includes a MIMO separation part | 10-20-2011 |
20120002580 | MOBILE STATION APPARATUS, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND PROGRAM - A mobile station apparatus performs communication with abase station apparatus using a multiple number of component frequency bands, each being a band having a predetermined frequency bandwidth, and includes: a controller setting up a value relating to the transmission power of each component frequency band in accordance with the number of component frequency bands to which radio resources are allocated; and a transmission processor adjusting the transmission power of each component frequency band, based on the value of transmission power set at the controller and transmitting a signal using radio resources of a multiple number of component frequency bands. With this configuration, in a radio communication system using a multiple number of component frequency bands, it is possible to adjust transmission power control in accordance with the number of uplink component frequency bands used for transmission and transmit a signal of a waveform suitable for the radio communication system. | 01-05-2012 |
20120002602 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE STATION APPARATUS, AND COMMUNICATION METHOD - TPC is appropriately operated in response to access method switching timing, an error is prevented from occurring in communication, and influence given to another cell due to transmission of unnecessary power is reduced. | 01-05-2012 |
20120057543 | WIRELESS COMMUNICATION SYSTEM, RECEPTION APPARATUS, TRANSMISSION APPARATUS, COMMUNICATION METHOD OF WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM, AND AUTONOMOUS DISTRIBUTED NETWORK - Based on a data signal and a known reference signal, a frequency response of a channel is predicted, and the state of the channel over the entire transmission band is predicted such that frequency allocation is performed in a short period of time. A reception apparatus that receives a signal from a transmission apparatus which distributedly arranges signals in a frequency domain into a plurality of frequencies and which performs wireless transmission, the reception apparatus including: a channel property prediction unit ( | 03-08-2012 |
20120063341 | WIRELESS COMMUNICATION SYSTEM, MOBILE STATION APPARATUS, BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD - To reduce power consumption in a mobile station apparatus in uplink, while making the system more efficient, the mobile station apparatus has a plurality of transmission antennas | 03-15-2012 |
20120064846 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTER, AND CONTROL PROGRAM FOR WIRELESS TRANSMITTER - By switching between an SFBC and a CDD according to required transmission power in an uplink, the transmission diversity of the uplink is efficiently performed. A wireless transmitter which includes transmitting antennas | 03-15-2012 |
20120093114 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, BASE STATION CONTROL PROGRAM, AND MOBILE STATION CONTROL PROGRAM - A wireless communication system which includes a base station and a mobile station and in which the mobile station performs data transmission to the base station by allocating a transmission signal converted into a frequency signal to contiguous frequency bands or non-contiguous frequency bands divided into a predetermined number, wherein, when retransmission occurs in the data transmission the mobile station has performed by allocating the transmission signal converted into the frequency signal into the non-contiguous frequency bands, the base station determines a transmission power headroom of the mobile station in the allocation of the transmission signal to the non-contiguous frequency bands, and, if a result of the determination shows that there is not a transmission power headroom, the base station instructs the mobile station to allocate the transmission signal to the contiguous frequency bands and to perform the retransmission by increasing transmission power. | 04-19-2012 |
20120093251 | RADIO COMMUNICATION SYSTEM, TRANSMISSION APPARATUS, AND RECEPTION APPARATUS - To provide a radio communication system, a transmission apparatus, a central control unit, and a reception apparatus, which can enhance transmission performances without giving more interference than necessary. The radio communication system in which a plurality of transmission apparatuses | 04-19-2012 |
20120096336 | Transmission Apparatus Reception Apparatus and Communication System - To improve performance of a decoder even in a system with the coder configuration determined by inserting a doping bit sequence known between a transmission apparatus and a reception apparatus in an information bit sequence to transmit, the transmission apparatus is a transmission apparatus that transmits radio signals to the reception apparatus, and is provided with a doping section | 04-19-2012 |
20120120942 | WIRELESS COMMUNICATION SYSTEM, TRANSMITTER AND WIRELESS COMMUNICATION METHOD - To suppress deterioration of channel estimation accuracy even when a terminal moves at high speed in a system for switching among a plurality of insertion patterns of channel estimation signals, in a wireless communication system for using one of a plurality of types of frame formats with different insertion positions of a channel estimation symbol, and spreading data in the frequency domain to perform communications, the types of frame formats include at least a first frame format having a channel estimation symbol in which channel estimation signals are allocated to all subcarriers, and a second frame format having a channel estimation symbol in which a channel estimation signal and data is multiplexed, and PAPR characteristics of a subcarrier for data transmission in the second frame format are the same as PAPR characteristics of a subcarrier for transmitting a symbol assigned only the data. | 05-17-2012 |
20120163858 | IMAGE FORMATION APPARATUS - What is provided is an image formation apparatus including: an image formation part provided inside a main body so that the image formation part may be attached to the main body and detached from the main body; a plurality of opening-closing parts which may be opened and closed to attach the image formation part to the main body or detach the image formation part from the main body; and a plurality of locking parts latching each of the plurality of opening-closing parts to the main body, wherein when one of the plurality of locking parts undergoes a releasing operation, an other one of the plurality of locking parts also undergoes a releasing operation. | 06-28-2012 |
20120275410 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, AND FREQUENCY ALLOCATING METHOD - A wireless communication system includes: a plurality of transmitter apparatuses each of which converts a transmitted signal into a frequency signal, then places the frequency signal into a frequency spectrum allocated to the transmitter apparatus and then transmits the signal; and a receiver apparatus that receives the signals transmitted by the plurality of transmitter apparatuses, removes the interference between the signals of the transmitter apparatuses, and separates the signals of the respective transmitter apparatuses; wherein the bandwidth obtained by summing the frequency spectra allocated to the plurality of transmitter apparatus exceeds the allocatable system bandwidth. | 11-01-2012 |
20140119326 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, BASE STATION CONTROL PROGRAM, AND MOBILE STATION CONTROL PROGRAM - A base station which includes a transmission section that is configured to transmit, to a mobile station, first information indicating first control information for controlling a number of transmission antennas of the mobile station for retransmitting transmission data with at least second information indicating a retransmission request and third information indicating second control information for controlling retransmission power for retransmitting the transmission data. The base station also includes a radio section configured to receive, from the mobile station, the transmission data. | 05-01-2014 |
20140187229 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMISSION APPARATUS AND WIRELESS TRANSMISSION METHOD - A wireless transmission apparatus that transmits transmission data in each of a plurality of system frequency bands using a transmission power controlled so that a total transmission power of each of the plurality of system frequency bands is less than a maximum transmit power, where the maximum transmit power incase of transmitting the transmission data simultaneously using two or more system frequency bands in the plurality of system frequency bands is less than a maximum transmit power in case of transmitting the transmission data using single system frequency band in the plurality of system frequency band. | 07-03-2014 |
20140219318 | WIRELESS COMMUNICATION SYSTEM, CONTROL STATION APPARATUS AND TERMINAL APPARATUS - A control station apparatus comprising a transmitter that is configured to transmit, to a terminal apparatus, information indicating an allocation method for allocating frequency signals to a plurality of subcarriers, where the information indicates a communication scheme which is one of Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme and Clustered Discrete Fourier Transform-spread-OFDM (Clustered DFT-S-OFDM) scheme. | 08-07-2014 |
20140334367 | MOBILE STATION APPARATUS, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND PROGRAM - A mobile station (MS) communicates with a base station using a plurality of component frequency bands, each band of the plurality of component frequency bands being a band having a predetermined frequency bandwidth. The MS sets up an upper limit value of transmission power (TP) of each component frequency band in accordance with the number of component frequency bands to which radio resources are allocated at a time. The MS also adjusts the TP of each component frequency band based on the upper limit value of TP set at the controller, wherein the adjusting of the TP is according to the following formula: | 11-13-2014 |
20140348529 | CLEANING DEVICE, IMAGE FORMING APPARATUS, AND CLEANING METHOD - A cleaning device is provided in an image forming apparatus, and cleans an object to be cleaned. The cleaning device includes a cleaning member, a cleaning mechanism, a motor, a cleaning control portion, and a driving change portion. The cleaning member slides along the object to be cleaned. The cleaning mechanism causes the cleaning member to slide along the object to be cleaned. The motor drives the cleaning mechanism. The cleaning control portion drives the motor with a predetermined driving voltage being applied to the motor, and stops the driving of the motor after a predetermined driving time has elapsed. The driving change portion is able to change one or both of the driving time and the driving voltage. | 11-27-2014 |
20150055596 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTER, AND CONTROL PROGRAM FOR WIRELESS TRANSMITTER - A mobile station transmitting transmission signals using one of a plurality of transmission schemes which includes at least a first transmission scheme and a second transmission scheme, where in a case that the used transmission scheme is the first transmission scheme, the transmission signals are applied by an open loop (OL) in which precoding information is not fed back and in a case that the used transmission scheme is the second transmission scheme, the transmission signals are applied by a closed loop (CL) for which a precoding matrix indicator (PMI) is fed back from the mobile station. The first peak-to-average power ratio (PAPR) characteristics of the first transmission scheme differs from the second PAPR characteristics of the second transmission scheme. | 02-26-2015 |