Patent application number | Description | Published |
20100098177 | RADIO TRANSMISSION DEVICE, CONTROL DEVICE, RADIO COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A radio communication system converts a time domain signal into a plurality of frequency signals to be allocated onto a plurality of subcarriers to be transmitted. The radio communication system changes a method of allocating the plurality of frequency signals onto the plurality of subcarriers based on transmission power information. | 04-22-2010 |
20100190506 | SCHEDULING METHOD AND CONTROL STATION APPARATUS - Consecutive subcarriers are reserved, and the reserved consecutive subcarriers are properly allocated to a terminal. The invention is a scheduling method that allocates, within an available band, a block composed of one or more subcarriers and used for signal transmission by a communication terminal being a destination of communication, and the method includes the steps of selecting (S | 07-29-2010 |
20110045765 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS AND RELAY STATION APPARATUS - In a radio communication system including a base station apparatus | 02-24-2011 |
20110097993 | RELAY APPARATUS, COMMUNICATION SYSTEM AND RELAY METHOD - It is aimed to expand a coverage area of a transmission apparatus by relay, while improving spectral efficiency (cell throughput). A relay apparatus for transmitting a signal received from a transmission apparatus to a reception apparatus has a received signal processing section | 04-28-2011 |
20130064150 | COMMUNICATION SYSTEM, TRANSMITTER, TRANSMISSION CONTROL METHOD, TRANSMISSION CONTROL PROGRAM, AND PROCESSOR - A precoding deciding unit selects precoding for the spatial multiplexing of signals addressed to a plurality of receivers form a plurality of precodings. A filter multiplication unit multiplies the signals by filter coefficients to be used in the precoding selected by the precoding deciding unit. | 03-14-2013 |
20130121277 | BASE STATION APPARATUS, TERMINAL APPARATUS AND WIRELESS COMMUNICATION SYSTEM USING THEM - When signals received by receiving antennas included in each terminal are subjected to MMSE combining, it is configured that each terminal is able to grasp position of desired signal in signal vector obtained after combining. A base station | 05-16-2013 |
20130136050 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM AND INTEGRATED CIRCUIT - To realize transmission performances equivalent to those of an MU-MIMO BLAST ZF-THP system without increasing a signal processing amount in a base station apparatus in a downlink MU-MIMO transmission system. A transmission apparatus is provided with a plurality of transmission antennas, generates a transmission signal addressed to each reception apparatus based on information indicating spatial correlation of channels to and from a plurality of reception apparatuses, space-multiplexes the generated each transmission signal in the same wireless resource, and transmits it to each reception apparatus. The transmission apparatus includes: an ordering determination part | 05-30-2013 |
20130223269 | BASE STATION DEVICE, MOBILE STATION DEVICE, AND RADIO COMMUNICATION SYSTEM USING SAME - Provided is a radio communication system in which a base station apparatus with a plurality of transmission antennas spatially multiplexes and transmits a transmission signal addressed to a plurality of mobile station apparatuses, and in which the mobile station apparatuses receive the signal transmitted from the base station apparatus. The mobile station apparatuses select a desired precoding vector from predetermined candidates, and give the base station apparatus information identifying the selected precoding vector. The base station apparatus generates a linear filter on the basis of the information from the mobile station apparatuses, grasps multi-user interference that at least one of the mobile station apparatuses is subjected to when the generated linear filter is used, generates a new transmission signal by subtracting the multi-user interference from the transmission signal, and spatially multiplexes the transmission signal addressed to the plurality of mobile station apparatuses by multiplying the new transmission signal by the linear filter. Thus, favorable reception characteristics can be obtained while CSI feedback is performed efficiently. | 08-29-2013 |
20130286940 | BASE STATION DEVICE, TERMINAL DEVICE, AND WIRELESS COMMUNICATION SYSTEM USING THE BASE STATION DEVICE AND THE TERMINAL DEVICE - A wireless communication system in which a base station apparatus having a plurality of transmission antennas and one or more terminal apparatuses communicate with each other is provided with at least two methods of a first feedback method and a second feedback method regarding propagation path information at the time of reception. In accordance with a communication condition between the base station apparatus and the terminal apparatus, or the function of the terminal apparatus, the terminal apparatus performs feedback by one of the two methods of the first feedback method and the second feedback method. The base station apparatus performs spatial multiplexing transmission on the basis of the propagation path information that has been fed back. Thus, in a system in which CSI is fed back for MIMO transmission, desired transmission characteristics can be efficiently obtained. | 10-31-2013 |
20140146904 | WIRELESS TRANSMISSION APPARATUS, WIRELESS RECEPTION APPARATUS, WIRELESS COMMUNICATION SYSTEM, CONTROL PROGRAM AND INTEGRATED CIRCUIT - The present invention switches an interference suppression system between a linear precoding and a nonlinear precoding in accordance with a communication environment. A wireless transmission apparatus is provided with a plurality of transmission antenna units ( | 05-29-2014 |
20140177747 | MIMO COMMUNICATION METHOD, MIMO TRANSMITTING DEVICE AND MIMO RECEVING DEVICE - The current feedback mechanisms in the 802.11 standard are not appropriate for MU-MIMO, in which many STAs transmit their feedback to an AP, which then proceeds to select the most appropriate STAs for transmission and discards the feedback of the rest of the STAs. This operation leads to large overhead, effectively limiting the effectivity of the MU-MIMO operation. The techniques described in this document allow for a more efficient transmission of feedback related to a MIMO communication. | 06-26-2014 |
20140204841 | WIRELESS TRANSMISSION DEVICE AND WIRELESS RECEPTION DEVICE - A wireless reception device is notified of whether a multi-user MIMO signal transmitted from a wireless transmission device has undergone linear precoding or non-linear precoding without increasing the amount of control information. A wireless transmission device having a plurality of transmit antennas | 07-24-2014 |
20150023279 | PRE-CODING DEVICE, WIRELESS TRANSMISSION DEVICE, WIRELESS RECEIVING DEVICE, WIRELESS COMMUNICATION SYSTEM, AND INTEGRATED CIRCUIT - A terminal device knows which kind of pre-coding has been applied without increasing overhead in a wireless communication system in which plural kinds of pre-coding are selectively or simultaneously used. | 01-22-2015 |
20150029979 | RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, RADIO COMMUNICATION SYSTEM, AND INTEGRATED CIRCUIT - A radio receiving apparatus is notified of whether a multi-user multiplexing transmission signal that is transmitted from a radio transmitting apparatus is the multi-user MIMO or the OFDMA without increasing a control information amount. The radio transmitting apparatus includes a scheduling section | 01-29-2015 |
Patent application number | Description | Published |
20100215080 | RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM, AND RADIO TRANSMISSION APPARATUS - A transmission apparatus according to the present invention includes: an encoding section; a modulation section; a variable-SF spreading section that performs spreading with variable SF according to control information A from a control section; an IDFT section that performs IDFT on output from the spreading section; a GI inserting section; a parallel/serial conversion section that converts output from the GI inserting section into a serial data sequence; a digital/analog conversion section; and an RF section that transmits a signal from an antenna after converting the signal to a frequency band for analog signal transmission and controlling it to an appropriate transmission power. The control section is configured to generate control information A for determining the variable SF and input the information A to the variable-SF spreading section and the RF section. In control information A, SF is varied depending on transmission power required. | 08-26-2010 |
20110007701 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE AND COMMUNICATION METHOD - A communication system that transmits a signal from a first communication device to a second communication device using a plurality of frequency channels, wherein at least one of the plurality of frequency channels uses part of subcarriers in an overlapping manner with one or more adjacent frequency channels, the first communication device includes a transmission unit which transmits a signal to the second communication device using one or more of the plurality of frequency channels, and the second communication device includes a reception unit which receives the signal transmitted by the transmission unit. | 01-13-2011 |
20110032973 | RADIO COMMUNICATION SYSTEM AND TRANSMITTING APPARATUS USED FOR THE SAME - To provide a system that can accommodate a greater number of terminals within a limited band and can obtain a higher transmission rate. While the number of frequency signals (spectrums) output in parallel by performing a spread spectrum from the DFT unit of each terminal is 12, the number of sub-carriers constituting one sub-channel is set at 10 or 11. In this case, the users (users A and G) allocated to the sub-channels at both ends of the band will not perform transmission of one frequency signal at the end (one sub-carrier) of all the frequency signals output from the DFT unit, whereas the users (users B to F) allocated to the other sub-channels will not perform transmission of the frequency signals at the ends (two sub-carriers). This transmission can be realized by deleting (clipping) the associated number of signals from both ends or from one end of the frequency signals output from the DFT unit of each terminal and allocating the frequency signals after clipping, to individual sub-channels. | 02-10-2011 |
20110044377 | RADIO COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD - A clipping rate is controlled in spectrum shaping according to a propagation path to thereby improve transmission characteristics and perform communication at a stable transmission rate. | 02-24-2011 |
20110212743 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, RADIO COMMUNICATION DEVICE, RECEPTION DEVICE, AND PROGRAM - Each of first radio communication devices includes; a frequency spread unit which spreads frequency of a transmitted signal to generate a frequency-spread signal; and a mapping unit which allocates the frequency-spread signal to a subcarrier according to the mapping information which specifies a subcarrier. A second radio communication device includes: a demapping unit which extracts from a received signal a signal of the subcarrier specified by the mapping information; and an inverse frequency spread unit which inverse-frequency-spreads the extracted signal. The first radio communication device or the second radio communication device includes a use subcarrier decision unit that decides a subcarrier to which the frequency-spread-signal is allocated according to a communication path capacity of each subcarrier of each antenna used for transmission by the first radio communication devices and generates mapping information used to specify the decided subcarrier. | 09-01-2011 |
20110286382 | RADIO COMMUNICATION SYSTEM AND BASE STATION - Disclosed is a radio communication system including relay stations | 11-24-2011 |
20110292984 | RECEIVER APPARATUS, COMMUNICATION SYSTEM, RECEPTION METHOD AND COMMUNICATION METHOD - A receiver apparatus | 12-01-2011 |
20120045995 | INTERFERENCE SUPPRESSION WIRELESS COMMUNICATION SYSTEM AND INTERFERENCE SUPPRESSION WIRELESS COMMUNICATION DEVICE - An interference suppression wireless communication device to be used in an interference suppression wireless communication system, includes: a variance acquirer configured to acquire a variance of channel estimation errors associated with a channel for a transmission signal of the interference suppression wireless communication device, a variance of channel estimation errors associated with a channel for an interference signal, and a variance of noise included in the transmission signal when the transmission signal is received; and a coefficient calculator configured to calculate, based on the variances acquired by the variance acquirer, a coefficient by which the interference signal to be subtracted from the transmission signal is multiplied. | 02-23-2012 |
20120064833 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE - When applying inflated lattice precoding (ILP) transmission to a multi-carrier scheme, there arises a need to notify coefficient α thereof per sub-carrier. Applying ILP transmission has proven difficult since multi-carrier schemes such as those widely adopted in mobile communication systems, etc., in recent years have an extremely large number of sub-carriers and the information volume of the control signal becomes extremely large. As such, at a transmitter device B, coefficient α is inputted to a 1/α multiplier part | 03-15-2012 |
20120071104 | TRANSMITTER DEVICE, RECEIVER DEVICE, AND WIRELESS COMMUNICATION SYSTEM - With respect to a wireless communication system comprising a transmitter device | 03-22-2012 |
20120088453 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A wireless communication apparatus includes: a channel information acquiring unit that, acquires a transmitted signal channel matrix that is channel information as a transmitted signal of a pre-interference-removal transmitted signal group and an interference signal channel matrix that is channel information as an interference signal of the non-interference-removed transmitted signal group; an interference signal calculating unit that generates an interference signal group at the time of reception by the non-interference-removed transmitted signal group with respect to the pre-interference-removal transmitted signal group, based on the pre-interference-removal transmitted signal group, the non-interference-removed transmitted signal group, the transmitted signal channel matrix, and the interference signal channel matrix; a subtracting unit that subtracts the interference signal group from the pre-interference-removal transmitted signal group to generate a post-interference-removal transmitted signal group; and a transmission antenna group that transmits the post-interference-removal transmitted signal group and the non-interference-removed transmitted signal group from mutually different transmission antennas. | 04-12-2012 |
20120213054 | RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM, AND RADIO TRANSMISSION APPARATUS - A transmission apparatus according to the present invention includes: an encoding section; a modulation section; a variable-SF spreading section that performs spreading with variable SF according to control information A from a control section; an IDFT section that performs IDFT on output from the spreading section; a GI inserting section; a parallel/serial conversion section that converts output from the GI inserting section into a serial data sequence; a digital/analog conversion section; and an RF section that transmits a signal from an antenna after converting the signal to a frequency band for analog signal transmission and controlling it to an appropriate transmission power. The control section is configured to generate control information A for determining the variable SF and input the information A to the variable-SF spreading section and the RF section. In control information A, SF is varied depending on transmission power required. | 08-23-2012 |
20140086186 | RADIO TRANSMISSION DEVICE, CONTROL DEVICE, RADIO COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A radio communication system converts a time domain signal into a plurality of frequency signals to be allocated onto a plurality of subcarriers to be transmitted. The radio communication system changes a method of allocating the plurality of frequency signals onto the plurality of subcarriers based on transmission power information. | 03-27-2014 |
20140126465 | RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM, AND RADIO TRANSMISSION APPARATUS - A wireless communication system, method, program, and/or circuitry which includes at least a base station device and a terminal device. The base station device is configured to transmit information indicating a slot for transmitting data by the transmission device. The terminal device is configured to decode the received information using a first communication scheme and transmit data to be allocated to the slot using a second communication scheme to an another terminal device, where the first communication scheme is a different scheme than the second communication scheme. | 05-08-2014 |
20140185594 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, RADIO COMMUNICATION DEVICE, RECEPTION DEVICE, AND PROGRAM - A communication device comprising a transmission unit and a reception unit. The transmission unit is configured to transmit, to a first communication device, first information indicating a first set of subcarriers comprising of a plurality of subcarriers, and to a second communication device, second information indicating a second set of subcarriers comprising of a plurality of subcarriers. The reception unit is configured to receive a first Discrete Fourier Transform-spread-OFDM (DFT-S-OFDM) signal from the first communication device using the first information and a second Discrete Fourier Transform-spread-OFDM (DFT-S-OFDM) signal from the second communication device using the second information. Also, in the communication device, a portion of the second set of subcarriers can overlap with at least a portion of the first set of subcarriers in a time frame of a plurality of time frames. | 07-03-2014 |
20140286461 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE AND COMMUNICATION METHOD THAT CAN IMPROVE FREQUENCY USE EFFICIENCY - A communication device receives a reception signal including at least a first reception signal and a second reception signal, where the first reception signal is a signal to be transmitted using a first set of subcarriers and the second reception signal is a signal to be transmitted using a second set of subcarriers which overlaps with at least one end of the first set of subcarriers in a time frame. The communication device also demodulates information indicating data included in the first reception signal after reducing the second reception signal transmitted by using one or more overlapping subcarriers of the second set of subcarriers from the reception signal. | 09-25-2014 |
20140293926 | SCHEDULING METHOD AND CONTROL STATION APPARATUS - A communication terminal performing Fourier transform to convert a first time-domain signal into frequency-domain signals, allocating the frequency-domain signals to one or more first block is composed of two or more contiguous subcarriers as a first allocation unit, performing inverse Fourier transform to convert the allocated frequency-domain signals into a second time-domain signal, and transmitting, to a BS, the second time-domain signal simultaneously with another communication terminal, in case that the other communication apparatus performs communication with the BS using one or more second block composed of two or more contiguous subcarriers as a second allocation unit wherein the second block, wherein the number of subcarriers of the second block is equal to a value of x multiplied by the number of subcarriers of the first block, and x is equal to a value of 2 or a value greater than 2. | 10-02-2014 |
Patent application number | Description | Published |
20110299250 | WIRING SUBSTRATE AND MANUFACTURING METHOD THEREOF - A wiring substrate | 12-08-2011 |
20120090881 | METAL CORE SUBSTRATE - A metal core substrate is provided. A first routing member is comprised of a first area of one sheet of metal core material; a first insulation layer formed on the first area; and a first circuit pattern made of a copper foil and formed on the first insulation layer. A second routing member comprised of: a second area of the one sheet of the metal core material, which is separated from the first area; a second insulation layer formed on the second area; and a second circuit pattern made of a copper foil and formed on the second insulation layer. A connecting member electrically connects the first routing member and the second routing member. The connecting member is comprised of a third area of the one sheet of the metal core material, which is interposed between the first area and the second area. | 04-19-2012 |
20120202383 | FUSE CONNECTION UNIT - A fuse connection unit includes a metal core substrate that includes a metal core plate and insulation layers formed on front and back faces of the metal core plate, and a fuse block mounted on the metal core substrate. The metal core substrate has a fuse connection terminal part which is projected from an end edge of each of the insulation layers. The fuse block has a fuse connection terminal. The fuse connection terminal part and the fuse connection terminal are configured to be connected to a fuse. | 08-09-2012 |
20140262451 | WIRING SUBSTRATE AND MANUFACTURING METHOD THEREOF - Disclosed is wiring substrate and method of manufacturing thereof, the wiring substrate including a substrate having a high thermal conductive layer, in which at least one of a front surface and a rear surface of the substrate is a mounting surface for a variety of components; a window section formed in the substrate; and a connection terminal extended from an inside surface portion of the window section and bending in a direction perpendicular to a surface of the substrate. | 09-18-2014 |
20140268581 | WIRING SUBSTRATE AND MANUFACTURING METHOD THEREOF - Disclosed is a wiring substrate and method of manufacturing thereof, the wiring substrate including: a substrate having a high thermal conductive layer, in which at least one of a front surface and a rear surface of the substrate is a mounting surface for a variety of components; a connection terminal extended from the substrate and bending in a direction that is perpendicular to a surface of the substrate; and a heat radiation piece section integrally installed to the connection terminal. | 09-18-2014 |