Patent application number | Description | Published |
20080304658 | Wireless Communication Apparatus and Wireless Communication Method - An inventive wireless communication apparatus that, in a wireless communication system to which a secret key scheme is applied, can generate a secret key, which is different from a secret key generated by a third party, even if a wireless signal is intercepted by the third part having an approximate propagation path environment to a receiving wireless communication apparatus. In the inventive apparatus, an eigenvalue selecting part ( | 12-11-2008 |
20090011700 | Wireless Communication Method, Relay Station Apparatus, and Wireless Transmitting Apparatus - A wireless communication method and the like for improving the system throughput. The wireless communication method is used in a mobile communication system having a base station apparatus (BS), a relay station apparatus (RS) ( | 01-08-2009 |
20090017814 | RADIO COMMUNICATION METHOD, RELAY STATION DEVICE, AND RADIO RECEIVER DEVICE - Provided is a radio communication method or the like for making compatible an improvement in error rate characteristics and a reduction in delay. The radio communication method is used in a mobile communication system ( | 01-15-2009 |
20090022239 | RADIO TRANSMITTER, RADIO RECEIVER AND SYMBOL ARRANGING METHOD - A symbol arranging method by which a processing load due to channel estimation for MIMO channels can be reduced. In the methods a symbol is arranged for a transmission frame format having a pilot area and a data area. The pilot symbol is arranged in the pilot area. An ICE data symbol used for iterative channel estimation (ICE) is arranged in an ICE data area in the data area. The MIMO data symbol not used for ICE is arranged in the MIMO data area in the data area. | 01-22-2009 |
20090028262 | RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION DEVICE - There are disclosed a radio communication device and others capable of generating in a short time a secret key common to a base station and a mobile station in a radio communication system using the MIMO technique and starting the encrypted communication at an early stage. In this device, in ST | 01-29-2009 |
20090031183 | RETRANSMISSION CONTROL SCHEME AND WIRELESS COMMUNICATION APPARATUS - A retransmission control scheme and a wireless communication apparatus wherein the efficiency of retransmission control is enhanced to further improve the system throughput. In this wireless communication apparatus ( | 01-29-2009 |
20090034637 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND LINK ADAPTATION METHOD - A link adaptation method and others wherein feedback information amount can be reduced. According to this method, a receiving apparatus ( | 02-05-2009 |
20090055701 | MIMO TRANSMITTING APPARATUS, MIMO RECEIVING APPARATUS, AND RETRANSMITTING METHOD - A MIMO transmitting apparatus that achieves a flexible control in accordance with variation of a propagation environment to reduce the number of retransmissions. A buffer ( | 02-26-2009 |
20090060082 | WIRELESS COMMUNICATION APPARATUS, AND FEEDBACK INFORMATION GENERATING METHOD - A wireless communication apparatus that allows channel information to be reproduced with high precision at a transmitting end without increasing feedback information amount. In this apparatus, a channel estimating part ( | 03-05-2009 |
20090092118 | INTERLEAVE APPARATUS AND INTERLEAVE METHOD - An interleave apparatus and an interleave method for preventing an increase in the number of retransmissions to improve the throughput. In a wireless communication apparatus having the interleave apparatus, a data holding part ( | 04-09-2009 |
20090093265 | RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS AND RADIO TRANSMITTING METHOD - A radio transmitting apparatus, a radio receiving apparatus and a radio transmitting method wherein the accuracy of detecting streams in D-TxAA is improved. There is included a transmission mode switching part ( | 04-09-2009 |
20090116571 | TRANSMITTER, RECEIVER, AND COMMUNICATION METHOD - A transmitter, a receiver and a communication method enabling improvement of the data rate of an MIMO system. One signal x | 05-07-2009 |
20090124210 | RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - A radio transmitting apparatus, a radio receiving apparatus, a wireless communication method and a wireless communication system wherein even when a channel correlation is large, the channel capacity and the feedback amount can be improved. In ST | 05-14-2009 |
20090130975 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided is a mobile communication system capable of obtaining a diversity effect even when a signal received by a relay station has an error in a corporate relay to which time space encoding is applied. In this mobile communication system, when S | 05-21-2009 |
20090238290 | TRANSMITTING DEVICE, RECEIVING DEVICE, TRANSMITTING METHOD, RECEIVING METHOD AND WIRELESS COMMUNICATION SYSTEM - Provided is a transmitting device which improves a data rate while maintaining channel estimation accuracy, or improves channel estimation accuracy while maintaining a data rate, in a MIMO-OFDM system. In the transmitting device, a transmitting antenna information adding section ( | 09-24-2009 |
20090262851 | RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - A radio transmitting apparatus and a radio transmitting method wherein the loss of transmission efficiency is suppressed to improve the reception quality of pilots received by a receiver apparatus. In the present apparatus and method, in a case of transmitting a pilot block at one of two transmission antennas, the areas of data blocks placed immediately before and after the pilot block are reduced, and the CP of the pilot block is expanded by the amount of that reduction. On the other hand, it is arranged that the interval of transmitting the expanded CP and pilot block be an interval of halting the transmission at the other transmission antenna. | 10-22-2009 |
20090268621 | TRANSMITTING APPARATUS, RECEIVING APPARATUS AND MULTIPLEX NUMBER CONTROLLING METHOD - A spatial multiplex number controlling method and others wherein streams can be separated for each of receivers and the transmission efficiency can be improved. In a receiving apparatus, a PER is calculated from a history of CRC test results per stream multiplex number. A reception quality and an offset corresponding to the calculated PER are fed hack to a transmitting apparatus. The transmitting apparatus assigns, based on the fed-back reception quality and offset, the streams, thereby controlling the stream multiplex number. | 10-29-2009 |
20090268835 | WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION DEVICE - A wireless communication method realizing a large channel capacity even in an environment of high spatial correlation and improving the reception characteristic, a wireless communication system, and a wireless communication device. Signals (X | 10-29-2009 |
20090291702 | RADIO COMMUNICATION TERMINAL AND RADIO COMMUNICATION BASE STATION DEVICE - Provided are a radio communication terminal and a radio communication base station device which are installed in a Multi-User MIMO system even if the ability to suppress interference is low. According to beam combination information fed back from NON-MIMO UE, and beam information and a CQI fed back from another MIMO UE, a scheduler section ( | 11-26-2009 |
20090305690 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Disclosed is a radio transmission device capable of improving a transmission stream error resistance and preventing lowering of a throughput of a communication system. In this device, according to the feedback information from the radio reception device, a repetition control unit ( | 12-10-2009 |
20100029285 | RELAY STATION IN MOBILE COMMUNICATION SYSTEM AND RELAY TRANSMISSION CHANNEL SETTING METHOD - Provided is a relay station capable of reducing control information required for allocating a relay transmission channel in a mobile communication system. The relay station ( | 02-04-2010 |
20100075703 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RETRANSMISSION CONTROL METHOD - In a multiuser MIMO system, entire system throughput achieved during retransmission is significantly enhanced. When an interference signal addressed to another user equipment (UE | 03-25-2010 |
20100197221 | WIRELESS COMMUNICATION METHOD, RELAY STATION APPARATUS, AND WIRELESS TRANSMITTING APPARATUS - A wireless communication method and the like for improving the system throughput. The wireless communication method is used in a mobile communication system having a base station apparatus (BS), a relay station apparatus (RS) ( | 08-05-2010 |
20100222003 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION DEVICE, AND TRANSMISSION CONTROL METHOD - It is possible to provide a transmission control method, a radio communication system, and a radio base station device which can reduce the time required until an inter-cell interference is reduced so as to improve the system throughput. A base station ( | 09-02-2010 |
20100254485 | PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, AND MIMO RECEPTION DEVICE - It is possible to provide a novel pilot transmission method which can calculate an accurate channel estimation value, a MIMO transmission device using the pilot transmission method, and a MIMO reception device which communicates with the MIMO transmission device. The MIMO transmission device ( | 10-07-2010 |
20100260235 | PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, MIMO RECEPTION DEVICE WHICH PERFORMS COMMUNICATION WITH MIMO TRANSMISSION DEVICE - It is possible to provide a novel pilot transmission method which can calculate an accurate channel estimation value, a MIMO transmission device using the pilot transmission method, and a MIMO reception device which performs communication with the MIMO transmission device. The MIMO transmission device ( | 10-14-2010 |
20100260284 | PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, AND MIMO RECEPTION DEVICE - Provided is a MIMO transmission device which can effectively perform a pilot transmission by using a surplus sample generated in a pilot symbol while maintaining the pilot separation accuracy at a reception side. The MIMO transmission device ( | 10-14-2010 |
20100272034 | BASE STATION DEVICE, MOBILE STATION DEVICE, COMMUNICATION SYSTEM, CHANNEL ESTIMATION METHOD, TRANSMISSION ANTENNA DETECTION METHOD, AND PROGRAM - It is possible to provide a base station device, a mobile station device, a communication system, a channel estimation method, a transmission antenna detection method, and a program which can employ PVS as the SCH transmission diversity method and avoid a side lobe to improve the adjacent cell search performance. When employing the PVS on the frequency axis of the SCH in these, different precoding weights are applied between sub carrier groups so as to correlate a plurality of PSC sequences to a precoding weight matrix and identify the PSC sequence. Moreover, the number of sub carriers to be allocated to sub carrier groups is correlated to the number of transmission antennas so as to detect periodicity of the self-correlation characteristic of a reception SCH signal, thereby identifying the number of transmission antennas. | 10-28-2010 |
20100284487 | WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD - A wireless transmission method for improving the reception characteristic of a preamble. The wireless transmission method allows the patterns of subcarriers (transmitting antenna Tx | 11-11-2010 |
20100315962 | BASE STATION DEVICE, TERMINAL DEVICE, AND CLOSED LOOP CONTROL METHOD - Provided is a base station device capable of reducing a DL-CSI feedback amount in a TDD type radio communication system in which a DL bandwidth is different from a UL bandwidth. In this device, a demultiplexing unit ( | 12-16-2010 |
20110165835 | RADIO COMMUNICATION METHOD, RELAY STATION DEVICE, AND RADIO RECEIVER DEVICE - Provided is a radio communication method or the like for making compatible an improvement in error rate characteristics and a reduction in delay. The radio communication method is used in a mobile communication system including a mobile station, a relay station and a base station. A transmitted signal containing a signal addressed to the base station is transmitted at first from the mobile station to the relay station. A non-reproduced relay signal obtained in the relay station from the transmitted signal is transmitted from the relay station to the base station. On the basis of the reception result of the non-reproduced relay signal at the base station, a re-transmission request of the transmitted signal is transmitted from the base station. A reproduced relay signal, as obtained from the transmitted signal in the relay station, is transmitted from the relay station to the base station in accordance with the re-transmission request transmitted from the base station. | 07-07-2011 |
20110222525 | TERMINAL DEVICE, BASE STATION DEVICE, AND FREQUENCY RESOURCE ALLOCATION METHOD - It is possible to realize reduction of inter-cell interference by an adaptive FFR with a low delay. A terminal ( | 09-15-2011 |
20120208452 | RADIO COMMUNICATION METHOD - A wireless communication method and the like for improving the system throughput. The wireless communication method is used in a mobile communication system having a base station apparatus, a relay station apparatus and a mobile station apparatus # | 08-16-2012 |
20140133498 | COMMUNICATION DEVICE AND COMMUNICATION METHOD - A data transmission device as the present communication device includes an RTP data packet creation unit which generates data packets, a data packet rearrangement processing unit which rearranges the data packets, and an FEC data creation unit which generates redundant packets for the data packets on the basis of rearranged data packets and matrix data applied to the data packets. | 05-15-2014 |
20140153637 | DATA PROCESSING DEVICE AND DATA PROCESSING METHOD - A data processing device calculates the number of temporary redundant packets based on the transmission rate of a wireless network and the frame composition ratio between I frames and P frames, calculates a temporary redundant packet rate based on the transmission rate and the number of temporary redundant packets, calculates an encoding rate from the transmission rate and the temporary redundant packet rate, encodes video data at the encoding rate to packetize the video data, calculates the number of redundant packets added to each frame obtained as a result of the processing on the video data, and adds redundant packets to each frame. | 06-05-2014 |