Patent application number | Description | Published |
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 |
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 |
20090052392 | RETRANSMISSION CONTROL METHOD, BASE STATION AND MOBILE STATION - A base station, a mobile station and a retransmission control method for enabling communication to be more efficiently performed. In a communication system comprising a base station ( | 02-26-2009 |
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 |
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 |
20090185634 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION DEVICE, AND CHANNEL CORRELATION MATRIX DECISION METHOD - It is possible to prevent lowering of a throughput of a radio communication system even when propagation path environments of an uplink line and downlink line are asymmetric. A maximum proper value calculation unit ( | 07-23-2009 |
20090232233 | MIMO RECEIVER APPARATUS AND MIMO TRANSMITTER APPARATUS - A MIMO receiver apparatus and a MIMO transmitter apparatus capable of reducing the feedback information amount to reduce the system traffics. A wireless communication apparatus ( | 09-17-2009 |
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 |
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 |
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 |
20100189189 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - The signaling amount in selecting a plurality of beams is reduced in pre-coding to thereby enhance the throughput. To select a plurality of beams when the pre-coding is applied, when notification of a beam number is provided in a feedback signal from a user equipment | 07-29-2010 |
20100190486 | RADIO COMMUNICATION MOBILE STATION DEVICE AND CDD MODE JUDGING METHOD - Provided is a radio communication mobile station device which can accurately judge a CDD mode of an interference signal from other cell when using a CDD. In this device, a mode judging unit ( | 07-29-2010 |
20100195749 | Radio Communication Device and Symbol Arrangement Method - Provided is a radio communication device which can reduce the affect of CDD channel fluctuation of an interference signal from other cell when using a CDD. In this device, an arrangement unit ( | 08-05-2010 |
20100202386 | WIRELESS COMMUNICATION APPARATUS AND MAPPING METHOD - A wireless communication apparatus wherein the power consumption can be reduced. In this apparatus, a code block dividing part ( | 08-12-2010 |
20100266060 | RADIO COMMUNICATION DEVICE AND METHOD FOR DETERMINING DELAY AMOUNT OF CDD - A radio communication device capable of obtaining the frequency diversity effect when a CDD is used for the open-loop transmission. A CDD control information determination section ( | 10-21-2010 |
20100309997 | RADIO COMMUNICATION TERMINAL DEVICE, RADIO COMMUNICATION BASE STATION DEVICE, AND CQI FEEDBACK METHOD - It is possible to provide a radio communication terminal device, a radio communication base station device, and a CQI feedback method which can improve the CQI reproducibility while reducing the feedback overhead. A terminal channel judgment unit judges whether a local terminal is a TU terminal or a LOS terminal. A feedback CQI decision unit selects a Best-M report if the local terminal is the TU terminal, and selects a DCT report if the local terminal is the LOS terminal. The feedback CQI decision unit feeds back the CQI by using the selected report method. | 12-09-2010 |
20110176595 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block. | 07-21-2011 |
20120120835 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block. | 05-17-2012 |
20130121386 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - The signaling amount in selecting a plurality of beams is reduced in pre-coding to enhance throughput. When notification of a beam number is provided in a feedback signal from a user equipment to a radio base station, a superior beam number, having a high quality rank with small time variation, is bound up and fixed for a predetermined time period and notification of only a inferior beam number is provided within the predetermined time period. For example, to select three beams among six beams, first, notification of the superior two beam numbers (beam numbers ‘b’ and ‘c’) is provided. These beam numbers are fixed for a predetermined time period and then notification of only the inferior one beam number (beam number ‘e’) is provided within the predetermined time period. Thus, the signaling amount for providing beam number notification is reduced. | 05-16-2013 |
20140098903 | radio communication for reducing the signaling amount in selecting a plurality of beams in pre-coding for enhancing throughput - The signaling amount in selecting a plurality of beams is reduced in pre-coding to enhance throughput. When notification of a beam number is provided in a feedback signal from an user equipment to a radio base station, a superior beam number, having a high quality rank with small time variation, is bound up and fixed for a predetermined time period and notification of only a inferior beam number is provided within the predetermined time period. For example, to select three beams among six beams, first, notification of the superior two beam numbers (beam numbers ‘b’ and ‘c’) is provided. These beam numbers are fixed for a predetermined time period and then notification of only the inferior one beam number (beam number ‘e’) is provided within the predetermined time period. Thus, the signaling amount for providing beam number notification is reduced. | 04-10-2014 |