| Patent application number | Description | Published |
|---|
| 20080273609 | RECEIVING APPARATUS, TRANSMITTING APPARATUS, AND RECEPTION METHOD - Channel fluctuation values on propagation paths of modulated signals transmitted from a plurality of antennas are estimated, an eigenvalue of a channel fluctuation matrix created with the above-mentioned channel fluctuation values as elements is found in order to relate antenna received signals to modulated signals, and using that eigenvalue, receiving antenna selection, combining of modulated signals, and weighting processing on soft decision decoded values, are performed, and modulated signals are demodulated. By this means, it is possible to perform demodulation processing based on the effective reception power of a modulated signal (that is to say, the essential reception power, of the reception power obtained by a receiving apparatus, that can be effectively used when demodulating a modulated signal), enabling the precision of demodulation of modulated signals to be improved. | 11-06-2008 |
| 20090207929 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A transmission method for transmitting an orthogonal frequency division multiplexing signal. The method includes composing a plurality of carrier groups each including one or more subcarriers and assigning transmission data for a plurality of transmission destination terminals, to the plurality of carrier groups, on a basis of one carrier group for one transmission destination terminal basis. The method further includes selecting, for each of the carrier groups, one of a first frame configuration where the transmission data is transmitted using one modulated signal, and a second frame configuration where the transmission data is transmitted using a plurality of modulated signals and transmitting the assigned transmission data of the plurality of transmission destination terminals at a same time on a time axis. | 08-20-2009 |
| 20100040160 | COMMUNICATION MEETHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for generating a transmission signal to transmit an orthogonal frequency division multiplexing signal, from one antenna or from a plurality of antennas, to a plurality of terminals. Transmission data for the plurality of terminals is assigned to a plurality of carrier groups, each carrier group including a plurality of carriers. For each of the plurality of carrier groups, one of a first frame configuration is selected, wherein one modulated signal is transmitted, and a second frame configuration is selected wherein a plurality of modulated signals are transmitted by using the plurality of antennas. A transmission signal is generated using the selected frame configuration, for transmitting the transmission data assigned to the plurality of carrier groups during a certain period. | 02-18-2010 |
| 20100111216 | Secure Communication Method, Transmission Apparatus and Reception Apparatus - A transmitting apparatus that transmits signals from a plurality of antennas, and can improve the security of communication compared with a conventional system. In this apparatus, an antenna changing section ( | 05-06-2010 |
| 20100142645 | Communication Apparatus and Communication Method - Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S | 06-10-2010 |
| 20100260278 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S | 10-14-2010 |
| 20100284481 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for use in a communication apparatus that receives an orthogonal frequency division multiplexing (OFDM) signal transmitted from a base station. The OFDM signal includes a plurality of carrier groups each comprising a plurality of carriers, the plurality of carrier groups being assigned transmission data for a plurality of communication apparatuses. Each of the plurality of carrier groups adopt one of a first frame configuration, where the transmission data is transmitted using one modulation signal, and a second frame configuration, where the transmission data is transmitted using a plurality of modulated signals. The method includes specifying a carrier group to which transmission data for the communication apparatus is assigned, based on control information included in the received OFDM signal and generating reception data associated with the specified carrier group based on one of the one modulated signal used in the first frame configuration and the plurality of modulated signals used in the second frame configuration. | 11-11-2010 |
| 20110038437 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S | 02-17-2011 |
| 20110110355 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for generating a transmission signal to transmit a modulated signal generated using orthogonal frequency division multiplexing, from a transmitting apparatus with a plurality of antennas, toward a plurality of terminals. The method includes assigning transmission data for the plurality of terminals to a plurality of carrier groups, each carrier group including a plurality of carriers and selecting, from the plurality of antennas, an antenna to be used for transmission toward each of the plurality of terminals. As a transmission mode for each of the plurality of carrier groups, a selection is made of one of a first transmission mode, in which one modulated signal is transmitted, and a second transmission mode in which a plurality of modulated signals are transmitted by using the selected antennas. A transmission signal is generated for transmitting the transmission data assigned to the plurality of carrier groups during an identical time period, using the selected transmission mode. | 05-12-2011 |
| 20110116388 | COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for communicating in a communication apparatus includes receiving an orthogonal frequency division multiplexing (OFDM) signal transmitted from a base station, the OFDM signal including a plurality of carrier groups, each carrier group including a plurality of carriers. The plurality of carrier groups are assigned transmission data for a plurality of communication apparatuses, and each of the plurality of carrier groups adopts one of a first transmission mode in which the transmission data is transmitted using one modulated signal and a second transmission mode in which the transmission data is transmitted using a plurality of modulated signals. A carrier group, to which transmission data for the communication apparatus is assigned, is specified based on control information included in the received OFDM signal. Reception data associated with the specified carrier group is generated by decoding the one modulated signal used in the first transmission mode, when the first transmission mode is adopted for the specified carrier group, and reception data associated with the specified carrier group is generated by decoding the plurality of modulated signals used in the second transmission mode when the second transmission mode, is adopted for the specified carrier group. | 05-19-2011 |
