Patent application number | Description | Published |
20090046791 | MULTICARRIER RECEIVING APPARATUS, MULTICARRIER COMMUNICATION SYSTEM AND DEMODULATION METHOD - To suppress effects produced on other terminals as much as possible, while obtaining the advantage of soft-combining. A multicarrier receiving apparatus that receives a packet comprised of at least a propagation path estimation symbol and a scrambled information symbol to demodulate, and has propagation path estimating sections | 02-19-2009 |
20090059849 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A communication means which allocates a terminal identifier to a destination communication apparatus and carries out communication with the destination communication apparatus by use of a plurality of functions including an identifier generation section | 03-05-2009 |
20090116592 | RECEIVER AND CHANNEL ESTIMATION METHOD - An extrapolation method to suppress degradation of characteristics of channel estimation is provided. | 05-07-2009 |
20090196166 | RECEIVER AND FREQUENCY INFORMATION ESTIMATING METHOD - A receiver | 08-06-2009 |
20090232243 | WIRELESS TRANSMITTING APPARATUS, WIRELESS RECEIVING APPARATUS, WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTING METHOD AND WIRELESS RECEIVING METHOD - To enable shared control information to be demodulated without requiring advance information on a MIMO block or non-MIMO block prior to demodulation of the shared control information of the block, and further enable the shared control information to be demodulated early. A wireless transmitting apparatus which performs wireless transmission in MIMO or non-MIMO for each radio frame comprised of a block or a plurality of blocks, and has mapping sections ( | 09-17-2009 |
20100254497 | COMMUNICATION DEVICE - Improving the accuracy of estimation of channel responses in receiving signals from a plurality of antennas is disclosed. A transmitting device of a base station includes a preamble A generating unit | 10-07-2010 |
20130070867 | COMMUNICATION DEVICE - Improving the accuracy of estimation of channel responses in receiving signals from a plurality of antennas is disclosed. A transmitting device of a base station includes a preamble A generating unit | 03-21-2013 |
20130272248 | COMMUNICATION METHOD AND RADIO TRANSMITTER - Radio transmission is performed even to a communication party whose bandwidth that can be used for transmission and reception is limited without having an influence of an offset of a DC component. A radio transmitter applied to an OFDMA communication system in which a plurality of different terminals performs communication using OFDM signals at the same time that includes a mapping part that allocates transmission power to each subcarrier, and also selects a subcarrier to which minimum power of the transmission power to be allocated is allocated and modulates transmission data in units of communication slots to output the modulated data; and a transmission part for transmitting radio signals including the modulated data using each of the subcarriers. | 10-17-2013 |
20140314020 | METHOD AND APPARATUS FOR ALLOCATING TERMINAL IDENTIFIERS BASED ON COMMUNICATION FUNCTION - A communication means which allocates a terminal identifier to a destination communication apparatus and carries out communication with the destination communication apparatus by use of a plurality of functions including an identifier generation section | 10-23-2014 |
20140355544 | COMMUNICATION METHOD AND RADIO TRANSMITTER - Radio transmission is performed even to a communication party whose bandwidth that can be used for transmission and reception is limited without having an influence of an offset of a DC component. A radio transmitter applied to an OFDMA communication system in which a plurality of different terminals performs communication using OFDM signals at the same time that includes a mapping part that allocates transmission power to each subcarrier, and also selects a subcarrier to which minimum power of the transmission power to be allocated is allocated and modulates transmission data in units of communication slots to output the modulated data; and a transmission part for transmitting radio signals including the modulated data using each of the subcarriers. | 12-04-2014 |
Patent application number | Description | Published |
20090129492 | TRANSMITTER, COMMUNICATION SYSTEM AND TRANSMISSION METHOD - A transmitter employing an OFDM system, including a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers modulated by a data symbol or a known symbol, a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter, and a scheduling portion which determines an existence of phase rotation. | 05-21-2009 |
20090135925 | TRANSMITTER, OFDM COMMUNICATION SYSTEM, AND TRANSMISSION METHOD - In a cellular system using an OFDM scheme, a transmitter multiplies subcarriers for channel estimation by codes and transmits them, the codes being such that a phase difference φ of the code multiplied with consecutive subcarriers for channel estimation is constant, and a code of every M consecutive subcarriers (M being 2 or an integer greater than 2) is mutually orthogonal with a code multiplied with same subcarriers of another transmitter. | 05-28-2009 |
20090168923 | MULTICARRIER-SIGNAL RECEIVING APPARATUS AND MULTICARRIER-SIGNAL TRANSMITTING APPARATUS - A multicarrier-signal receiving apparatus includes: a Fourier-transformer that performs a Fourier transform, on reception signals to extract subcarriers; a channel estimator that performs channel estimation on one of the extracted subcarriers using channel estimation symbols included in a subcarrier group to which the one of the extracted subcarriers belongs, the subcarrier group including subcarriers to which an identical phase rotation is added upon transmission; and a channel compensator that performs channel compensation on data symbols included in the one of the extracted subcarriers using a result of the channel estimation performed by the channel estimator on the one of the extracted subcarriers. | 07-02-2009 |
20090316818 | RECEIVER - A receiver employing an OFDM system which uses a frequency band that is constituted by a plurality of subchannels, and receiving a signal added a phase rotation which is made to respectively differ for each transmission antennas of transmitter and transmitted from the transmission antennas, having an informing portion which informs the transmitter of an information in subchannel units for deciding a phase rotation which is added to the signal. | 12-24-2009 |
20090316819 | TRANSMITTER - A transmitter employing an OFDM system, having a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers modulated by data or a known signal, a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter; and, and an allocating portion which allocates a plurality of groups to a receiver. | 12-24-2009 |
20110110356 | WIRELESS COMMUNICATION APPARATUS, MOBILE TERMINAL AND WIRELESS COMMUNICATION METHOD - To implement wireless communication also with a communicating apparatus that is a limited band terminal capable of receiving only part of frequencies. | 05-12-2011 |
20110136534 | BASE STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS TRANSMISSION METHOD - Allocation of transmission power is carried out adaptively without affecting adjacent cells. Included are a reception part that receives information from a mobile station apparatus, a transmission power determination part that determines transmission power when transmitting a wireless signal to a mobile station apparatus based on the received information, an acquisition part that acquires information about communication environment in each time channel or each frequency channel from the received information, a scheduling part that identified a time channel or frequency channel the relationship of which between transmission power and communication environment satisfies the condition for allocation and allocates transmission data and transmission power for transmission to a mobile station apparatus to a communication slot in the time channel or frequency channel, and a transmission part that transmits a wireless signal using the communication slot to which the transmission data and the determined transmission power have been allocated. | 06-09-2011 |
20120033753 | Communication Method and Radio Transmitter - Radio transmission is performed even to a communication party whose bandwidth that can be used for transmission and reception is limited without having an influence of an offset of a DC component. A radio transmitter applied to an OFDMA communication system in which a plurality of different terminals performs communication using OFDM signals at the same time that includes a mapping part that allocates transmission power to each subcarrier, and also selects a subcarrier to which minimum power of the transmission power to be allocated is allocated and modulates transmission data in units of communication slots to output the modulated data; and a transmission part for transmitting radio signals including the modulated data using each of the subcarriers. | 02-09-2012 |
20120039408 | Communication Method and Radio Transmitter - Radio transmission is performed even to a communication party whose bandwidth that can be used for transmission and reception is limited without having an influence of an offset of a DC component. A radio transmitter applied to an OFDMA communication system in which a plurality of different terminals performs communication using OFDM signals at the same time that includes a mapping part that allocates transmission power to each subcarrier, and also selects a subcarrier to which minimum power of the transmission power to be allocated is allocated and modulates transmission data in units of communication slots to output the modulated data; and a transmission part for transmitting radio signals including the modulated data using each of the subcarriers. | 02-16-2012 |
20120082254 | Wireless Communication Apparatus, Mobile Terminal and Wireless Communication Method - Wireless communication with a communicating apparatus that is a limited band terminal capable of receiving only part of frequencies. A frequency channel allocating section allocates frequency channels, a terminal reception quality information processing section calculates an optimal modulation rate and required transmit power for each subcarrier, a subcarrier power control section controls a level of transmit power for each subcarrier, and a determining section checks a reception bandwidth of a communicating apparatus, while determining whether the communicating apparatus is a full band terminal capable of receiving all the frequency channels in the system band or a limited band terminal capable of receiving only part of frequencies. When the communicating apparatus is the limited band terminal, the transmit power of all or part of subcarriers is decreased in a frequency channel that is adjacent to a reception band allocated to the communicating apparatus and that is allocated to another communicating apparatus. | 04-05-2012 |
20120113923 | Wireless Communication Apparatus, Mobile Terminal and Wireless Communication Method - Wireless communication with a communicating apparatus that is a limited band terminal capable of receiving only part of frequencies. A frequency channel allocating section allocates frequency channels, a terminal reception quality information processing section calculates an optimal modulation rate and required transmit power for each subcarrier, a subcarrier power control section controls a level of transmit power for each subcarrier, and a determining section checks a reception bandwidth of a communicating apparatus, while determining whether the communicating apparatus is a full band terminal capable of receiving all the frequency channels in the system band or a limited band terminal capable of receiving only part of frequencies. When the communicating apparatus is the limited band terminal, the transmit power of all or part of subcarriers is decreased in a frequency channel that is adjacent to a reception band allocated to the communicating apparatus and that is allocated to another communicating apparatus. | 05-10-2012 |
20120113924 | Wireless Communication Apparatus, Mobile Terminal and Wireless Communication Method - Wireless communication with a communicating apparatus that is a limited band terminal capable of receiving only part of frequencies. A frequency channel allocating section allocates frequency channels, a terminal reception quality information processing section calculates an optimal modulation rate and required transmit power for each subcarrier, a subcarrier power control section controls a level of transmit power for each subcarrier, and a determining section checks a reception bandwidth of a communicating apparatus, while determining whether the communicating apparatus is a full band terminal capable of receiving all the frequency channels in the system band or a limited band terminal capable of receiving only part of frequencies. When the communicating apparatus is the limited band terminal, the transmit power of all or part of subcarriers is decreased in a frequency channel that is adjacent to a reception band allocated to the communicating apparatus and that is allocated to another communicating apparatus. | 05-10-2012 |
20120230292 | BASE STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS TRANSMISSION METHOD - Allocation of transmission power is carried out adaptively without affecting adjacent cells. Included are a reception part that receives information from a mobile station apparatus, a transmission power determination part that determines transmission power when transmitting a wireless signal to a mobile station apparatus based on the received information, an acquisition part that acquires information about communication environment in each time channel or each frequency channel from the received information, a scheduling part that identified a time channel or frequency channel the relationship of which between transmission power and communication environment satisfies the condition for allocation and allocates transmission data and transmission power for transmission to a mobile station apparatus to a communication slot in the time channel or frequency channel, and a transmission part that transmits a wireless signal using the communication slot to which the transmission data and the determined transmission power have been allocated. | 09-13-2012 |
20120314805 | WIRELESS TRANSMITTING APPARATUS, WIRELESS RECEIVING APPARATUS, WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTING METHOD AND WIRELESS RECEIVING METHOD - To enable shared control information to be demodulated without requiring advance information on a MIMO block or non-MIMO block prior to demodulation of the shared control information of the block, and further enable the shared control information to be demodulated early. A wireless transmitting apparatus which performs wireless transmission in MIMO or non-MIMO for each radio frame comprised of a block or a plurality of blocks, and has mapping sections ( | 12-13-2012 |
20130142279 | MULTICARRIER-SIGNAL RECEIVING APPARATUS AND MULTICARRIER-SIGNAL TRANSMITTING APPARATUS - A multicarrier-signal transmitting apparatus comprising a rotation-amount setting unit configured to set a phase rotation amount for each subcarrier of a plurality of subcarrier groups, the phase rotation amount being set with a setting selected from a first setting and a second setting, the first setting being such that the phase rotation amount is identical for a plurality of subcarriers within each subcarrier group, and the second setting being such that the phase rotation amount is identical for a plurality of subcarriers within a plurality of subcarrier groups; and a phase rotator configured to add a phase rotation to a data signal of said each subcarrier of said plurality of subcarrier groups based on the phase rotation amount. | 06-06-2013 |
20130308720 | MULTICARRIER-SIGNAL RECEIVING APPARATUS AND MULTICARRIER-SIGNAL TRANSMITTING APPARATUS - A multicarrier-signal transmitting apparatus comprising a rotation-amount setting unit configured to set a phase rotation amount for each subcarrier of a plurality of subcarrier groups, the phase rotation amount being set with a setting selected from a first setting and a second setting, the first setting being such that the phase rotation amount is identical for a plurality of subcarriers within each subcarrier group, and the second setting being such that the phase rotation amount is identical for a plurality of subcarriers within a plurality of subcarrier groups; and a phase rotator configured to add a phase rotation to a data signal of said each subcarrier of said plurality of subcarrier groups based on the phase rotation amount. | 11-21-2013 |
20140219390 | MULTICARRIER-SIGNAL RECEIVING APPARATUS AND MULTICARRIER-SIGNAL TRANSMITTING APPARATUS - A multicarrier signal transmitting apparatus includes a rotation amount setting unit and a phase rotator. The rotation amount setting unit sets a phase rotation amount for each subcarrier of a plurality of subcarrier groups, where the phase rotation amount being set with a setting selected from a first setting being that the phase rotation amount is set for a first subcarrier group set which includes a plurality of continuous subcarrier groups and a second setting being that the phase rotation amount is set for a second subcarrier group set which includes a plurality of continuous subcarrier groups, where the number of the continuous subcarrier groups included in the first subcarrier group set is different from the number of the continuous subcarrier groups included in the second subcarrier group set. The phase rotator adds, based on the phase rotation amount, a phase rotation to reference signals and a data signal of each subcarrier of the plurality of subcarrier groups. | 08-07-2014 |