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 |
Patent application number | Description | Published |
20110292151 | SUPPORT STRUCTURE AND IMAGE FORMING APPARATUS - The present invention provides a support structure, which includes: a housing configured to store an optical element; a support unit configured to support the housing; a positioning element configured to position the housing with respect to the support unit; an vibration-proof element configured to proof transmission of vibration from the support unit to the housing; and an extension portion extending from the housing toward the support unit. The support unit includes a first surface configured to define an opening into which the extension portion is inserted. The positioning element supports and positions the extension portion in the opening so that the extension portion is apart from the first surface. The vibration-proof element is disposed between the first surface and the extension portion. | 12-01-2011 |
20120063398 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMISSION APPARATUS AND WIRELESS TRANSMISSION METHOD - Even when communication is performed independently in each CC (Component Carrier), the occurrence of an error in communication is prevented. Provided is a wireless communication system in which a wireless transmission apparatus and a wireless reception apparatus communicate with each other using a plurality of system frequency bands, wherein the wireless transmission apparatus performs transmission power control on transmission data in each of the system frequency bands, and furthermore, a maximum transmission power which can be transmitted in each of the system frequency bands can be controlled so as to be different from each other. Priorities are set on each of the system frequency bands, and transmission powers of the system frequency bands are determined in descending order of the priorities. | 03-15-2012 |
20120105922 | DRIVING UNIT AND IMAGE FORMING APPARATUS USING THE SAME - A driving unit ( | 05-03-2012 |
20120134441 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, AND MOBILE STATION APPARATUS - By taking into account the power consumption and PH of a mobile station apparatus on an uplink, while communication quality is maintained, the efficiency of power consumption is improved. There are provided a PUSCH reception section | 05-31-2012 |
20120155373 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS AND COMMUNICATION METHOD - A wireless communication system includes: a multiple number of mobile station apparatuses that transmit code bits obtained by applying error-correction coding to information bits; a relay station apparatus that receives code bits from the multiple mobile station apparatuses, applies network coding on the code bits and transmits the network-code bits; and a base station apparatus that receives and decodes the code bits and the network-code bits, wherein the base station apparatus, when decoding the received code bits, performs iteration decoding by regarding the received code bits as a serially concatenated code of network coding and error correction coding. Accordingly, decoding is performed by regarding the network code and the error correction code as a serial concatenated code, it is possible to obtain diversity with a simple configuration. | 06-21-2012 |
20120189341 | IMAGE FORMING APPARATUS - The present invention provides an image forming apparatus, which has an exposure device for emitting light to a charged image formation surface to form an electrostatic latent image, a support structure for supporting the exposure device, and a housing for storing the exposure device, wherein the housing has a first wall which is provided with an insertion opening to insert the support structure that supports the exposure device, and the support structure is designed so that the support structure is pulled out of the housing through the insertion opening. | 07-26-2012 |
20120218961 | WIRELESS COMMUNICATION SYSTEM, COMMUNICATION CONTROL APPARATUS, COMMUNICATION TERMINAL APPARATUS, AND CONTROL PROGRAM OF COMMUNICATION CONTROL APPARATUS - To perform control so as to achieve a transmission power that satisfies a desired communication quality by an access method which a mobile station apparatus uses, in consideration of the frequency-selective diversity effect, when switching an access method to the one having a different frequency-selective diversity effect. In a wireless communication system in which a communication control apparatus and a communication terminal apparatus that are able to use a plurality of types of access methods perform wireless communication using any of the access methods, the communication control apparatus, when the necessity of changing the access method arises, determines the access method after change and notifies the communication terminal apparatus of switching the access method before change to the determined access method, and performs the transmission power control in accordance with communication characteristics of the determined access method. | 08-30-2012 |
20120230376 | WIRELESS COMMUNICATION SYSTEM, COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM - Provided is a wireless communication system including a first communication device configured to perform spectral shaping on a frequency signal and transmit the signal, and a second communication device configured to receive the signal transmitted by the first communication device, and the second communication device includes: a frequency averaging unit configured to dividing information on transmission power gains in all the discrete frequencies into blocks by a plurality of discrete frequencies, information being necessary for the first communication device to perform the spectral shaping; a quantizing unit configured to quantize representative values of the blocks; and a transmitting unit configured to transmit the quantized signals. | 09-13-2012 |
20120258762 | TRANSMISSION APPARATUS, WIRELESS COMMUNICATION SYSTEM, MOBILE STATION APPARATUS CONTROL PROGRAM, AND BASE STATION APPARATUS CONTROL PROGRAM - A mobile station apparatus includes a plurality of PAs (Power Amplifiers) and a plurality of antennas and transmission performances thereof is to be improved when transmission signals having peak powers different from one another are transmitted through the use of the respective antennas. A transmission apparatus includes a plurality of PAs and a plurality of antennas and transmits a signal having a high peak power, by means of determining a transmission signal to be transmitted through the use of each of the PAs based on the capability of each of the PAs, converting the transmission signal into a frequency signal by time-frequency conversion, dividing the frequency signal into a plurality of clusters, and allocating the clusters to bands non-contiguously. Furthermore, the transmission apparatus transmits a signal having a low peak power by means of allocating the frequency signal to continuous bands. | 10-11-2012 |
20120281644 | TRANSMIT POWER CONTROL METHOD AND TRANSMISSION APPARATUS - In the system of a variable transmission bandwidth, transmit power control for minimizing an impact on a circuit is performed. There is provided a transmit power control method that is applied to a transmission apparatus that transmits data through the use of a different transmission format at each transmission opportunity, in which transmit power is controlled depending on the transmission format before digital/analogue conversion is performed on transmission data, and, based on the transmit power control, the transmit power is controlled on the transmission data that has been subjected for the digital/analogue conversion. In addition, the transmission format specifies a frequency bandwidth used for transmission of the transmission data. | 11-08-2012 |
20120322392 | RADIO TRANSMITTER, BASE STATION APPARATUS, RADIO TRANSMISSION METHOD, CONTROL PROGRAM FOR BASE STATION APPARATUS, AND INTEGRATED CIRCUIT - In using frequency selective precoding to a multicarrier signal, notification is provided with control information. A radio transmitter, divides a frequency signal into a plurality of clusters, arranges each of the divided clusters on a frequency domain and multiplies each of the clusters by a precoding matrix, limits the number of precoding matrices to be selected based on the relationship between a precoding matrix to be multiplied to any of the clusters and a precoding matrix to be multiplied to any of the other clusters. The number of precoding matrices to be selected is limited based on the relationship between a precoding matrix to be multiplied to any one of the clusters and a precoding matrix to be multiplied to another cluster neighboring thereto. The number of precoding matrices to be selected is limited based on frequency correlation between any one of the clusters and another cluster neighboring thereto. | 12-20-2012 |
20120324308 | WIRELESS COMMUNICATION SYSTEM, COMMUNICATION DEVICE, PROGRAM, AND INTEGRATED CIRCUIT - A communication device includes a turbo encoding section including a plurality of component encoders, wherein the plurality of component encoders within the turbo encoding section use different constraint lengths. | 12-20-2012 |
20120327830 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless communication system includes: wireless transmission devices; and a wireless reception device. Each of the wireless transmission devices is configured to transmit data by transforming a time domain signal into frequency domain signals to obtain first frequency signals, clipping a part of the first frequency signals to generate second frequency signals, and allocating the second frequency signals onto subcarriers. The wireless reception device is configured to demodulate, from signals received, time domain data transmitted. Communication is performed using a clipping rate set for each of the wireless transmission devices, the clipping rate being the number of the second frequency signals divided by the number of the first frequency signals. | 12-27-2012 |
20120328044 | COMMUNICATION APPARATUS, CONTROL PROGRAM FOR THE SAME, AND INTEGRATED CIRCUIT - In a radio communication method non-contiguously using a frequency, notification information is reduced, while suppressing an effect on performance. In a communication apparatus which switches between a communication method contiguously using a frequency and a communication method non-contiguously using the frequency, sets a parameter corresponding to each communication method, and performs radio communication, the communication apparatus sets a same parameter to an entire frequency band in the communication method contiguously using the frequency, while dividing a frequency band into a plurality of frequency bands and setting a different parameter for each divided frequency band in the communication method non-contiguously using the frequency. The communication method contiguously using the frequency and the communication method non-contiguously using the frequency mutually have different PAPR (Peak to Average Power Ratio) characteristics. | 12-27-2012 |
20130017835 | BASE STATION APPARATUS, MOBILE STATION APPARATUS, AND INTEGRATED CIRCUITAANM Takahashi; HirokiAACI Osaka-shiAACO JPAAGP Takahashi; Hiroki Osaka-shi JPAANM Hamaguchi; YasuhiroAACI Osaka-shiAACO JPAAGP Hamaguchi; Yasuhiro Osaka-shi JPAANM Yokomakura; KazunariAACI Osaka-shiAACO JPAAGP Yokomakura; Kazunari Osaka-shi JPAANM Nakamura; OsamuAACI Osaka-shiAACO JPAAGP Nakamura; Osamu Osaka-shi JPAANM Goto; JungoAACI Osaka-shiAACO JPAAGP Goto; Jungo Osaka-shi JP - A high spectrum efficiency is achieved even in a system where mobile station apparatuses with different units of assignment coexist. A base station apparatus, which performs radio communication with a mobile station apparatus, newly defines a minimum unit of assignment for each of the mobile station apparatuses, determines band assignment, and notifies each of the mobile station apparatuses of assignment information, when a mobile station apparatus with an RB (Resource Block) being a minimum unit of assignment and a mobile station apparatus with an RBG (RB Group) being a minimum unit of assignment coexist. In addition, the minimum unit of is newly defined by defining the number of RBs constituting an RBG for each mobile station apparatus. | 01-17-2013 |
20130028226 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, PROGRAM AND TRANSMISSION METHOD - A wireless communication system includes a first wireless communication apparatus, which includes a plurality of transmission antennas and transmits signals in an MIMO scheme, and a second wireless communication apparatus, which receives the signals. The first wireless communication apparatus performs the same frequency allocation for transmission antennas from which the same data is transmitted in case that transmission is performed in a rank less than the number of transmission antennas. | 01-31-2013 |
20130039405 | COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, PROGRAM, AND PROCESSOR - A coding scheme selection unit outputs bits of a signal in a past reception to a second coding unit and outputs bits of a retransmission signal to a third coding unit. The second coding unit decodes bits. The third coding unit codes bits with a different constraint length from a constraint length in the second coding unit. | 02-14-2013 |
20130083767 | WIRELESS TRANSMISSION APPARATUS, CONTROL PROGRAM, AND INTEGRATED CIRCUIT - In a communication system for performing transmission using non-contiguous frequency bands, transmit power control is performed in which minimum MPR is applied. A wireless transmission apparatus allocates at least one spectrum within a system band and performs transmit power control. The wireless transmission apparatus includes a dividing unit that divides a spectrum into non-contiguous clusters on the basis of band allocation information, a power control amount determining unit that determines transmission power for the spectrum or each of the clusters in accordance with a frequency band to which the spectrum or the cluster is allocated, a power control unit that performs transmit power control on the spectrum or each of the clusters by using the determined transmission power, and an allocating unit that allocates the spectrum or each of the clusters on which transmit power control has been performed to a frequency band on the basis of the band allocation information. | 04-04-2013 |
20130100914 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, AND COMMUNICATION METHOD - There are included a plurality of mapping units to which a plurality of data signal sequences related to the same data signal sequence are input via spectra cyclic shift units and which arrange the input data signal sequences on the frequency axis and output the arranged data signal sequences as transmission frequency spectra; an assignment information acquisition unit that controls the plurality of mapping units based on assignment information to cause the data signal sequences arranged on the frequency axis to partially overlap; the spectra cyclic shift units shifting, under control of an amount-of-shift decision unit, the input data signal sequences by an amount of cyclic shift to cause partially overlapping data signals to be identical and outputting the data signal sequences; and a plurality of transmit antennas that send out the transmission frequency spectra output by the plurality of mapping units. | 04-25-2013 |
20130114550 | 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. | 05-09-2013 |
20130135421 | POLYGON MOTOR UNIT, AND OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS WITH SAME - A polygon motor unit is mounted in a housing and includes a polygon mirror, a polygon motor, a board, a thermally conductive member and an elastic member. The polygon mirror is rotated and deflects light. The polygon motor includes a shaft portion and rotates the polygon mirror. The board includes a first surface and a second surface opposite to the first surface, and the polygon mirror and the polygon motor are mounted on the first surface. The thermally conductive member includes a positioning portion for setting a reference position, a third surface facing the second surface and a projection projecting from the third surface toward the second surface and configured to position the board with respect to the reference position by coming into contact with the second surface. The elastic member is made of a thermally conductive material and arranged between the second surface and the third surface. | 05-30-2013 |
20130142158 | WIRELESS COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND COMMUNICATION PROGRAM - Provided are a wireless communication system, communication apparatus, communication method, and communication program able to more reliably decode transmit signals at a receiver without more complex processing, even when resource blocks are overloaded. | 06-06-2013 |
20130157667 | TRANSMISSION DEVICE, RECEPTION DEVICE, RELAY DEVICE, COMMUNICATION SYSTEM, TRANSMISSION METHOD, RECEPTION METHOD, RELAY METHOD, COMMUNICATION METHOD, COMPUTER PROGRAM, AND SEMICONDUCTOR CHIP - [Object] To estimate a channel with high accuracy by a receiver without an increase in scale or an increase in power consumption of a device because of use of complicated calculation, even when a transmission device or a relay device uses different frequencies. | 06-20-2013 |
20130242930 | WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless transmission device is provisioned with a communication parameter setting unit configured to group time domain signals and setting different communication parameters for each group, a clipping unit configured to perform a clipping processing in the frequency domain on at least a portion of groups of the time domain signal, and a transmitting unit configured to transmit the time domain signal after the clipping processing. | 09-19-2013 |
20130265964 | WIRELESS CONTROL APPARATUS, WIRELESS TERMINAL APPARATUS, WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM OF WIRELESS CONTROL APPARATUS AND WIRELESS TERMINAL APPARATUS AND INTEGRATED CIRCUIT - When a mobile station apparatus uses a multi-antenna, spectrum efficiency is improved with clipping performed on a transmission signal from the mobile station apparatus. There is provided a wireless control apparatus applied to a wireless communication system that performs clipping processing not to transmit a spectrum of part of a frequency domain so as to transmit and receive data, the wireless control apparatus, based on channel state information with a wireless terminal apparatus which is a destination, generates clipping information indicating a frequency domain where the clipping processing is performed and determines frequency allocation for the wireless terminal apparatus to generate frequency allocation information, and notifies the wireless terminal apparatus of the clipping information and the frequency allocation information. | 10-10-2013 |
20130265973 | COMMUNICATION SYSTEM, TRANSMITTING DEVICE, RECEIVING DEVICE, AND PROCESSOR - An encoding unit encodes an information bit sequence. An IDFT unit generates a spectrum from the signals of the information bit sequence. A clipping unit generates, when re-transmitting the information bit sequence, a transmission spectrum that differs from that of the previous transmission. An OFDM signal generation unit transmits the transmission spectrum. | 10-10-2013 |
20130272254 | COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A communication system includes a first communication device that transmits a signal in the frequency domain, part of the signal being removed, and a second communication device that receives the transmitted signal. The second communication device determines a signal to be removed by the first communication device, and transmits information indicating the position of the signal to be removed. The first communication device receives the information indicating the position of the signal to be removed, removes part of the signal in the frequency domain on the basis of the information, and transmits the signal. Accordingly, clipping can be performed in accordance with the state of a channel. | 10-17-2013 |
20130279439 | WIRELESS TRANSMISSION APPARATUS, WIRELESS RECEPTION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND CONTROL PROGRAM AND INTEGRATED CIRCUIT OF WIRELESS TRANSMISSION APPARATUS - There is implemented a clipping technique that does not require a reception apparatus or a transmission apparatus to notify a transmission apparatus or a reception apparatus of information on clipping. A wireless transmission apparatus performs clipping processing not to transmit a spectrum of part of a frequency domain signal when transmitting data to a wireless reception apparatus and determines a frequency band to be subjected to the clipping processing using information other than information notified from the wireless reception apparatus and directly specifying a frequency band to be subjected to the clipping processing. | 10-24-2013 |
20130324143 | WIRELESS CONTROL APPARATUS, WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM, AND INTEGRATED CIRCUIT - In SORM (Spectrum-Overlapped Resource Allocation), interference to other cells caused by an increase in transmit power of mobile station apparatuses is suppressed. A wireless control apparatus allows a plurality of wireless terminal apparatuses to locate transmit signals at part of frequencies in a system band in an overlapping manner, and determines frequencies at which the individual wireless terminal apparatuses locate transmit signals, so that an interference level of the entire system band is suppressed to be lower than or equal to a certain value. Also, the wireless control apparatus determines frequencies at which the individual wireless terminal apparatuses locate transmit signals, so that a total sum of frequency bands allocated to the individual wireless terminal apparatuses is smaller than or equal to the system band. | 12-05-2013 |
20130329682 | WIRELESS CONTROL DEVICE, WIRELESS TERMINAL DEVICE, WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM AND INTEGRATED CIRCUIT - A convergence property as ability of removing inter-user interference of turbo equalization is improved in case of using a transmission method in which overlapping of a part of spectrum is allowed among a plurality of users. A wireless control device receiving a signal which is transmitted at the same transmitting timing by a plurality of wireless terminal devices, and performs a signal detection using turbo equalization, and the device includes a transmission method determination unit | 12-12-2013 |
20130329829 | WIRELESS CONTROL APPARATUS, WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM, AND INTEGRATED CIRCUIT - In a transmission method using spectrum shaping, interference to other cells caused by an increase in transmit power of mobile station apparatuses is suppressed. A wireless control apparatus performs control in which at least one wireless terminal apparatus clips part of frequencies in a system band and locates a transmit signal. The wireless control apparatus determines frequencies at which the individual wireless terminal apparatuses locate transmit signals, so that an interference level of the entire system band is suppressed to be lower than or equal to a certain value. Also, the wireless control apparatus determines frequencies at which the individual wireless terminal apparatuses locate transmit signals, so that a total sum of frequency bands allocated to the wireless terminal apparatuses before clipping is smaller than or equal to the system band. | 12-12-2013 |
20130329830 | RECEIVING DEVICE, TRANSMITTING DEVICE, RECEIVING METHOD, TRANSMITTING METHOD, PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - A reception device comprises a reception unit for receiving signals transmitted by assigning respectively a plurality of different frequency signal groups, which are generated based on a same bit sequence, to a plurality of layers, an MIMO separation unit for executing MIMO separation of the signals, received by the reception unit, into the frequency signal groups corresponding respectively to the plural layers, and a merging unit for merging individual items of information based on the frequency signal groups obtained by the MIMO separation, the items of information corresponding respectively to the plural layers. | 12-12-2013 |
20130336276 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMISSION METHOD, TRANSMITTING DEVICE, AND PROCESSOR - A transmitting device is a transmitting device configured to transmit a signal, and is provisioned with a determination unit configured to determine whether or not to perform a frequency clipping to remove a portion of a spectrum of the signal to transmit on the basis of a control information representing a frequency band used by the transmitting device to transmit data. | 12-19-2013 |
20130343320 | TERMINAL DEVICE, BASE STATION DEVICE, AND WIRELESS COMMUNICATION SYSTEM - A DMRS generator generates reference signals used for demodulation to which orthogonal codes, which are a code for one layer and a code for another layer being orthogonal to each other, are assigned. Concerning each of layers up to the predetermined number of layers, codes are assigned to the reference signals according to the same rules as assignment rules employed in a different terminal device. Accordingly, the throughput can be increased. | 12-26-2013 |
20140056213 | RADIO RELAY METHOD, BASE STATION, AND RADIO COMMUNICATION SYSTEM - A frequency resource required for communication between an RS and an eNB is reduced. Provided is a radio relay method for relaying a radio signal exchanged between a mobile station and a base station. The radio relay method includes performing relaying such that a frequency to be used in a case of relaying at least one of transmission signals transmitted from a plurality of mobile stations is overlapped with and allocated to at least a part of a frequency to which another non-relayed transmission signal is allocated. The frequency to be used for transmitting the relayed transmission signal may be disposed discretely on a frequency axis. | 02-27-2014 |
20140126507 | RECEIVING APPARATUS, FREQUENCY ASSIGNMENT METHOD, CONTROL PROGRAM, AND INTEGRATED CIRCUIT - In a communication system using retransmission control, throughput reduction is suppressed in a state in which an occurrence rate of retransmission is high. A receiving apparatus configured to, in a case where a signal received from a transmitting apparatus includes an error, request the transmitting apparatus to provide a retransmission signal, includes check units | 05-08-2014 |
20140301333 | RECEPTION DEVICE, RECEPTION METHOD, AND WIRELESS COMMUNICATION SYSTEM - A reception device is provided which can realize flexible frequency assignment to individual transmission devices in coordinated communication for receiving signals through coordination, while an influence caused by inter-user interference is reduced. In a reception device receiving a signal from a transmission device in coordination with at least one other reception device, the reception device includes a reception unit that receives the signal transmitted from the transmission device, a coordinated communication unit that, when a part of a frequency band of the signal transmitted from the transmission device is overlapped with a frequency band of a signal transmitted from another transmission device, receives from the other reception device a spectrum in at least a part of the overlapped frequency band of the signal transmitted from the transmission device, and a first reception processing unit that executes a reception process of the signal received by the reception device by employing the spectrum received by the coordinated communication unit. | 10-09-2014 |
20140341179 | BASE STATION DEVICE, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE, FREQUENCY BAND ALLOCATION METHOD, AND PROGRAM - The present invention makes it possible to minimize a decrease in the efficiency of frequency band utilization even if a constraint is placed on the number of points when performing an orthogonal transform. A base station device includes an allocation determination unit configured to allocate a frequency band of subcarriers to each of a plurality of communication devices that applies an orthogonal transform to a signal to be transmitted and transmits the signal by arranging the signal on the subcarriers, a communication device selection unit configured to select, from among the plurality of communication devices, a communication device for which the number of subcarriers included in the frequency band allocated to the communication device by the allocation determination unit is not a prescribed number, and a frequency band adjustment unit configured to perform a change that changes a frequency band allocated to the selected communication device, from the frequency band allocated by the allocation determination unit. The frequency band adjustment unit performs the change in such a way that the number of subcarriers included in a frequency band obtained as a result of the change becomes the prescribed number. | 11-20-2014 |
20140369397 | COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION PROGRAM, PROCESSOR, AND COMMUNICATION SYSTEM - An iterative processing unit iterates equalization processing on a reception signal. A PMI determination unit determines a precoding matrix by taking into consideration an interference amount that is removable by the iterative processing unit. A control information transmission unit transmits information indicating the precoding matrix. | 12-18-2014 |
20150029981 | MOBILE STATION DEVICE, BASE STATION DEVICE, WIRELESS COMMUNICATION SYSTEM AND TRANSMISSION METHOD - A probability of collision when a plurality of mobile station devices use contention based (CB) transmission is reduced. Provided is a mobile station device which performs the CB transmission, based on a control signal received from a base station device. The mobile station device includes a control information extraction unit | 01-29-2015 |
20150043451 | BASE STATION DEVICE, PROGRAM, INTEGRATED CIRCUIT, MOBILE STATION DEVICE, AND COMMUNICATION SYSTEM - The present invention reduces the amount of frequency resources required for uplink cooperative communication. There is provided a base station device that is applied to a communication system in which a plurality of base station devices establish cooperative communication with at least one mobile station device and includes a base station-to-base station communication section | 02-12-2015 |
20150063207 | RECEPTION DEVICE, POST-DECODING LIKELIHOOD CALCULATION DEVICE, AND RECEPTION METHOD - A reception device that can transmit, at a good error rate, information on which error correction has been performed by a block code is provided. The reception device includes a demodulating unit that generates a demodulation result of each coded bit for the signal received from the transmission device, a decoding unit that calculates a post-decoding likelihood of the block code based on the demodulation result, a symbol replica generating unit that generates a symbol replica based on the post-decoding likelihood, and a cancelling unit that cancels interference from the received signal by using the symbol replica. | 03-05-2015 |
20150063238 | CONTROL STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, ALLOCATION METHOD AND PROGRAM - Means of configuring a reference signal unique to a mobile station apparatus is provided. There is provided a control station apparatus notifying a first mobile station apparatus of a parameter group generating a reference signal. The control station apparatus includes: an RRC layer to configure a parameter set including a plurality of parameter groups generating the reference signal; and a physical layer to select one of the parameter groups and notify the mobile station apparatus. It is preferred that the parameter set is configured with a plurality of parameter groups that respectively configure a sequence number and a cyclic shift hopping pattern of the reference signal and includes a parameter group generating a reference signal the same as in a second mobile station apparatus different from the first mobile station apparatus. | 03-05-2015 |
20150086233 | IMAGE FORMING APPARATUS - An image forming apparatus includes an apparatus body, an image forming portion, a hold portion, a cooling air passage, and a communication opening. The apparatus body includes a front wall, and a side wall standing perpendicularly to the front wall, the front wall and the side wall defining an internal space. The image forming portion is disposed in the internal space, and forms an image on a sheet. The hold portion is in the form of a hollow at a part of the side wall, and adapted to be held when moving the apparatus body. The cooling air passage extends in the internal space vertically along the side wall. The communication opening allows communication between a space defined by the hold portion and a lower part of the cooling air passage. | 03-26-2015 |
20150124902 | TRANSMITTING DEVICE, RECEIVING DEVICE, TRANSMITTING METHOD, PROGRAM, AND INTEGRATED CIRCUIT - When signals to be transmitted to a plurality of mobile station devices are multiplexed by hierarchical modulation in a downlink, an increase in difference in reception quality among the mobile station devices is prevented. A transmitting device of the present invention is a transmitting device which performs data transmission to a plurality of receiving devices by using a plurality of symbols and a plurality of layers with different distances between signal points, and includes a modulating unit | 05-07-2015 |
20150139003 | MOBILE STATION DEVICE, PATH LOSS CALCULATION METHOD, PROGRAM, AND INTEGRATED CIRCUIT - Disclosed is a mobile station device | 05-21-2015 |
20150208412 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION METHOD - A wireless communication system includes a first communication device and a second communication device, in which the first communication device includes a cyclostationarity assignment unit that establishes a correlation between signals on two subcarriers that are a predetermined interval away from each other, the two subcarriers including at least one subcarrier on which a data signal to be transmitted to the second communication device is arranged, and the second communication device includes a frequency interval determination unit that determines the predetermined frequency interval according to information that has to be notified to a different device by the first communication device. Thus, a communication system is provided that is capable of suppressing a decrease in frame efficiency when assigning cyclostationarity. | 07-23-2015 |
20150223177 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, PROGRAM, AND INTEGRATED CIRCUIT - In a case where transmission power control is performed for a plurality of CCs in CA, information transmitted between a transmitter and a receiver in terms of the transmission power control is reduced. A wireless communication apparatus according to the present invention is a wireless communication apparatus configured to perform communication using at least two or more types of component carriers, including transmission power control units | 08-06-2015 |
20150244496 | BIT CODING DEVICE, BIT DECODING DEVICE, TRANSMISSION DEVICE, RECEPTION DEVICE, BIT CODING METHOD, BIT DECODING METHOD, TRANSMISSION METHOD, RECEPTION METHOD, AND PROGRAM - A bit coding device that creates a coded bit sequence by performing error correction coding on an input bit sequence that is input, includes a coding unit that creates a first bit sequence by performing the error correction coding on the input bit sequence, an extraction unit that extracts a second bit sequence from the first bit sequence, and an information compression unit that creates a third bit sequence by performing lossy compression on the second bit sequence, in which coded bits include at least a portion of the third bit sequence. | 08-27-2015 |
20150245346 | TERMINAL DEVICE, BASE STATION DEVICE, INTEGRATED CIRCUIT AND COMMUNICATION METHOD - There is provided a terminal device that communicates with a base station device. The terminal device includes a reception unit that receives downlink control information which is used for scheduling of a physical uplink shared channel and includes first information used to trigger a report of channel state information using the physical uplink shared channel, a higher layer signal including second information used to indicate two subframe sets, and the higher layer signal including third information. The third information is used to indicate a subframe set of the two subframe sets for which the report of the channel state information is triggered in a case that the report of the channel state information is triggered by a first value of a field of the first information, the third information is used to indicate a subframe set of the two subframe sets for which the report of the channel state information is triggered in a case that the report of the channel state information is triggered by a second value in the field of the first information, and the third information is used to indicate a subframe set of the two subframe sets for which the report of the channel state information is triggered in a case that the report of the channel state information is triggered by a third value in the field of the first information. | 08-27-2015 |
20150257060 | BASE STATION APPARATUS - There has been a problem that overhead increased from a time when a macro base station apparatus transmits, to a mobile station apparatus, an instruction of connection to small cell to a time when a pico base station apparatus performs scheduling of the mobile station apparatus. A first base station apparatus that constitutes a first cell for transmitting control information to a mobile station apparatus, in which a second cell, that is constituted by a second base station apparatus exists in the first cell, the control information with which the first base station apparatus gives an instruction of transmission of a reference signal to the mobile station apparatus in the first cell includes therein information for designating to transmit the reference signal to either the first base station apparatus or the second base station apparatus and information of a transmission parameter that is used for transmission of the reference signal to a base station apparatus that is instructed in the control information, and the first base station apparatus notifies the mobile station apparatus of the control information. | 09-10-2015 |
20150264585 | TERMINAL APPARATUS - A terminal uses different access methods between when the terminal transmits a signal to a pico base station and when the terminal uses a macro base station as a receiving station without increasing the amount of control information to be transmitted from the base station to the terminal. A terminal apparatus of the present invention communicates with a macro base station that forms a first cell or a pico base station that forms a second cell smaller than the first cell. Upon reception of an instruction to communicate with the pico base station from the macro base station (S | 09-17-2015 |
20150282092 | TERMINAL DEVICE - There has been a problem that when transmit power control is performed so as to compensate for a certain pathloss regardless of a type of a transmit signal, reception is not performed at a receiving end with an appropriate receive power in a case where a destination differs depending on a type of a transmit power. A terminal device includes a transmit power control unit that determines a transmit power. The transmit power control unit includes at least two types of transmit power equations which are used in determining the transmit power, determines the transmit power based on one of the equations when a scheduling request is transmitted to one of the multiple base stations, and determines the transmit power based on the other equation that is different from the one equation when information is transmitted to an another one of the base stations. The terminal device includes a transmission unit that transmits data based on the determined transmit power. | 10-01-2015 |
20150289275 | MOBILE STATION DEVICE AND COMMUNICATION METHOD - A mobile station device is provided that is capable of suppressing an increase in a resource that is occupied by a PUCCH while maintaining backward compatibility in LTE. A reference signal that is spread using a spread code that has an orthogonal relationship with a spread code is arranged in a domain in which a data signal that is spread by the spread code is arranged in the PUCCH in the LTE in the related art. | 10-08-2015 |
20150341910 | TERMINAL APPARATUS - A terminal apparatus, which performs communication with a first base station apparatus and a second base station apparatus which has a smaller maximum transmit power than that of the first base station apparatus, includes a control unit that extracts control information from signals received from the first base station apparatus and the second base station apparatus and sets communication parameters of an uplink data signal, in which a bit number of information which is extracted by the control unit as the control information from the signal from the second base station apparatus is smaller than a bit number of information which is extracted as the control information from the signal from the first base station apparatus. | 11-26-2015 |