Patent application number | Description | Published |
20080304582 | Multi-Carrier Transmission Device and Multi-Carrier Transmission Method - There is provided a multi-carrier transmission device capable of improving a packet error ratio in a system where transmission data is repeatedly multi-carrier-transmitted. In this device, the transmission data is subjected to error correction encoding in an error correction encoding unit ( | 12-11-2008 |
20080304583 | Radio Transmission Device, Radio Reception Device, Radio Transmission Method, and Radio Reception Method - A radio transmission device capable of improving channel estimation precision for each frequency. In this device, an FFT unit ( | 12-11-2008 |
20080304584 | Radio Transmission Device and Radio Reception Device - There is disclosed a radio transmission device capable of improving the throughput. The radio transmission device ( | 12-11-2008 |
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 |
20080305740 | Wireless Communication Apparatus, Wireless Communication Method and Wireless Communication System - The objective of the present invention is to suppress an increase in the power consumption for the relaying of signals. A relay station unit | 12-11-2008 |
20080305823 | Base Station Device and Wireless Communication Method - A base station device enabling prevention of an increase of the power consumption of a terminal and reduction of interference caused in neighboring cells. The base station device ( | 12-11-2008 |
20080310530 | Wireless Communication Apparatus and Wireless Communication Method - A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part ( | 12-18-2008 |
20090005109 | Wireless Transmitter and Wireless Transmitting Method - A wireless transmitter for infallibly delivering data to a wireless receiver, i.e., a multicast or broadcast receiver while increasing the system capacity or the individual channel accommodation capacity. A base station device ( | 01-01-2009 |
20090011702 | WIRELESS TRANSMISSION APPARATUS AND WIRELESS TRANSMISSION METHOD - A wireless transmission apparatus capable of suppressing a reduction in coverage area of a base station apparatus and improving the transmission rate in the coverage area. According to this apparatus, a mobile station ( | 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 |
20090022232 | RADIO TRANSMITTER APPARATUS AND RADIO RECEIVER APPARATUS - A radio receiver apparatus and a radio transmitter apparatus wherein the energy loss caused by addition of GI is suppressed, while the reception quality is improved. A signal having been subjected to an IFFT process is repetitively transmitted N times with a length of one OFDM symbol interval. At a receiver apparatus receiving the transmitted signals, a leading data extracting part ( | 01-22-2009 |
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 |
20090022241 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus capable of suppressing the reduction in the error correction ability in the wireless communication apparatus at the receiving end even when the propagation path environment is bad and hence the reception quality of received signals is low. This apparatus comprises a turbo encoding part ( | 01-22-2009 |
20090028065 | RADIO TRANSMISSION DEVICE, AND RADIO TRANSMISSION METHOD - Provided are a radio transmission device and a radio transmission method, which prevent the deterioration of a preamble detecting performance while reducing the collision probability of a RACH. In this radio transmission device, a Signature table storage unit ( | 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 |
20090036051 | RADIO COMMUNICATION APPARATUS AND RELAY TRANSMISSION METHOD - Provided is a relay transmission method capable of obtaining the diversity effect even when a relay station has detected an error in a relay signal when performing communication between a base station and a mobile station via a relay station. In the relay station used in this method, a decoding unit ( | 02-05-2009 |
20090046604 | WIRELESS COMMUNICATION METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - A wireless communication method for improving the transmission efficiency in an upstream communication in OFDMA-TDD system or the like. An upstream transmission timing control part ( | 02-19-2009 |
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 |
20090061767 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication method capable of selecting an optimum relay station, while preventing degradation of the throughput. According to this wireless communication method, in a frame | 03-05-2009 |
20090061920 | MOBILE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A mobile station wherein the power consumption can be suppressed. In a frame | 03-05-2009 |
20090083605 | RADIO COMMUNICATION APPARATUS - A radio communication apparatus of the present invention aims at improving an error rate characteristic in the end receiver. A repeater (radio relay device) RS | 03-26-2009 |
20090092072 | COMMUNICATION RELAY APPARATUS AND COMMUNICATION RELAY METHOD - A communication relay apparatus wherein the error rate characteristic of a relay destination is improved to raise the throughput, while reducing the given interference power to prevent the reduction of the throughput of the whole communication system. In the apparatus, a signal addressed to a base station is received (ST | 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 |
20090103648 | WIRELESS COMMUNICATION BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD IN MULTICARRIER COMMUNICATION - A base station apparatus wherein the interference suppression symbol combination can be performed in a case of using the repetition technique in a multicarrier communication. In a base station ( | 04-23-2009 |
20090104908 | WIRELESS COMMUNICATION BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication base station apparatus that can raise the usage efficiency of the frequency resources of the whole system in a multicarrier transmission. In this apparatus, a separating part ( | 04-23-2009 |
20090109999 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - Provided is a wireless communication apparatus by which the maximum throughput can be obtained while satisfying required reception qualities in multicarrier communication. In the apparatus, a coding section ( | 04-30-2009 |
20090111384 | WIRELESS COMMUNICATION TERMINAL APPARATUS AND CQI SELECTING METHOD - A wireless communication terminal apparatus and a CQI selecting method wherein when CQIs are grouped according to their levels and then an upper-order CQI, which is indicative of a group, is to be informed in a longer period, while a lower-order CQI, which identifies a CQI in the group, being to be informed in a shorter period, the CQI is precisely selected. A reception SIR range of 0-4 dB in UE corresponds to a level | 04-30-2009 |
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 |
20090135924 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD IN MULTI-CARRIER COMMUNICATIONS - Provided is a radio communication base station device capable of acquiring both a multi-user diversity effect and a frequency diversity effect simultaneously in multi-carrier communications. In this devices modulation units ( | 05-28-2009 |
20090135933 | COMMUNICATION TERMINAL DEVICE AND COMMUNICATION RELAY METHOD - There is provided a mobile station device in a multi-hop system capable of realizing relay of communication of another station while suppressing increase of power consumption of the local station. In this device, at timing t | 05-28-2009 |
20090137230 | RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - There is provided a wireless transmitting device, the reception quality of which can be improved by effectively using the cyclic prefix. In the wireless transmitting device, a data mapping determination unit ( | 05-28-2009 |
20090150740 | TRANSMITTING APPARATUS AND TRANSMITTING METHOD - A transmitting apparatus and a transmitting method wherein the systematic bit reception quality can be improved and the throughput performance can be improved. An IR parameter control part ( | 06-11-2009 |
20090168711 | RADIO COMMUNICATION SYSTEM, RADIO TRANSMISSION APPARATUS, AND RETRANSMISSION METHOD - Provided is a retransmission method capable of improving reception quality in retransmission control. In this method, for the first transmission, LRB (Localized Resource Block) method is selected as a resource allocation method according to the CQI fed back from the mobile station. A frequency resource having the best reception quality according to the LRB format is allocated for the transmission data. For the second transmission, the same resource allocation method (LRB) as the first transmission is used and the transmission data is allocated fro the same frequency resource. For the third transmission, the resource allocation method is switched from the method of the first and the second transmission and transmission data is allocated to the frequency resource by using DRB (Distributed Resource Block) format. | 07-02-2009 |
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 |
20090213813 | RADIO COMMUNICATION SYSTEM, MOBILE STATION APPARATUS, AND RACH TRANSMISSION METHOD - Provided is a mobile station device capable of performing RACH transmission with a small amount of resources. In this device, a RACH generating unit ( | 08-27-2009 |
20090233598 | RADIO COMMUNICATION BASE STATION APPARATUS, RADIO COMMUNICATION MOBILE STATION APPARATUS, AND RADIO COMMUNICATION METHOD IN MULTI-CARRIER COMMUNICATION - There is provided a mobile station device capable of effectively performing interference suppression symbol synthesis while suppressing the lowering of the transfer rate when using the repetition technique in multi-carrier communication. In the mobile station device ( | 09-17-2009 |
20090238094 | TRANSMISSION APPARATUS AND METHOD FOR TRANSMITTING DATA BASED ON A COMMUNICATION MODE DETERMINED EMPLOYING INFORMATION ON AN ERROR RATE - A transmission apparatus and method updates a communication mode selection table that updates a communication mode selection table correctly and selects an optimal MCS according to an actual channel condition. A buffer temporarily stores calibration data to be transmitted for updating a table. A scheduler performs scheduling of data to be transmitted based on a CIR on a downlink reported from a plurality of communication terminal apparatuses. When there is no data to be transmitted, the scheduler sends calibration data from the buffer. When calibration data is transmitted as a result of the scheduling, the scheduler notifies an address information generation section of the communication terminal apparatus to which the calibration data is transmitted. In one mode, first data is transmitted from a first communication apparatus to another communication apparatus, the first communication apparatus receives from the other communication apparatus, information on an error rate when the other communication apparatus receives the first data; and the first communication apparatus transmits second data to the other communication apparatus based on a communication mode determined using the information on the error rate. | 09-24-2009 |
20090239484 | RADIO RECEIVER APPARATUS AND RADIO TRANSMITTER APPARATUS - A radio receiver apparatus that can effectively utilize GI to improve the reception quality. In this apparatus, a data extracting part ( | 09-24-2009 |
20090239542 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication method capable of preventing reduction of the throughput. According to this wireless communication method, in a frame ( | 09-24-2009 |
20090245188 | RADIO COMMUNICATION SYSTEM, RADIO TRANSMISSION APPARATUS, AND RESOURCE ALLOCATION METHOD - Provided is a resource allocation method capable of improving a reception quality when connecting a plurality of sub frames into one frame and performing a communication process for each of the frames. In this method, when a sub frame # | 10-01-2009 |
20090245413 | RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - A radio transmitting apparatus and a radio transmitting method wherein a guard interval having a variable length is used to allow a radio receiving apparatus to precisely and easily obtain a symbol synchronization. In the radio transmitting apparatus, a GI adding part ( | 10-01-2009 |
20090257381 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD USED FOR MULTI-CARRIER COMMUNICATION - Provided is a base station capable of suppressing increase of overhead of allocation result report in frequency scheduling in multi-carrier communication and obtaining a sufficient frequency diversity effect. In the base station, encoding units ( | 10-15-2009 |
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 |
20090268651 | RADIO TRANSMISSION APPARATUS AND TRANSMISSION METHOD THEREOF - A base station apparatus that limits the influx of speech data into a packet channel and that enables the service quality of the packet channel to be prevented from degrading. In this apparatus, a protocol detecting section detects a protocol contained in an IP header of a packet. Based on the protocol, a packet type detecting section detects a type of packet. Based on the type of packet, a delay addition control section determines whether or not to add a delay. Specifically, when the packet is of VoIP, the delay addition control section instructs a switching section to output the packet to a delay adding section, and further instructs the delay adding section to add a delay. Meanwhile, when the packet is an IP packet, the delay addition control section instructs the switching section to output the packet to a scheduler. | 10-29-2009 |
20090290568 | RADIO COMMUNICATION APPARATUS AND RADIO TRANSMISSION METHOD - In order to improve reception performance, while reducing the arithmetic amount of a receiver apparatus in a multi-carrier CDMA system, different weightings are performed for the respective spread codes (chips) included in subcarriers in addition to performing weightings for the respective subcarriers. | 11-26-2009 |
20090298509 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Disclosed are a radio transmission device and a radio transmission method capable of reducing a reception error of a user at other cell and improving transmission efficiency at the other cell when frequency scheduling is combined with beam forming. In the device and the method, a beam allocation table storage unit ( | 12-03-2009 |
20090316825 | Radio Transmitter Apparatus, Radio Receiver Apparatus, and Wireless Communication System - A wireless communication system capable of obtaining diversity gain without fail even when the distribution of the reception qualities is large. In a radio transmitter apparatus ( | 12-24-2009 |
20100014475 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION SYSTEM - The present invention has an object to provide a wireless communication apparatus and a wireless communication method, which are capable of performing overall optimum channel allocation without producing a control delay with respect to a variation of channel qualities between a mobile station and a relay station. | 01-21-2010 |
20100023836 | OFDM Signal Collision Position Detection Apparatus and OFDM Reception Apparatus - A pilot reception power measuring section measures reception power of a pilot symbol and a data section reception power prediction section predicts reception power of data symbols based on the reception power of the pilot symbol. A power comparison section calculates a difference between this predicted value and the actual reception power of the data symbol, and when the difference is large, a collision position detection section regards the data symbol at the hopping position as colliding with data symbols in other cells. Then, an error correcting decoding section carries out error correcting processing by reducing likelihood of the data symbols detected to be involved in the collision and can thereby improve the error rate characteristic of decoded data. | 01-28-2010 |
20100040119 | WIRELESS COMMUNICATION APPARATUS - An object of the invention is to provide a wireless communication apparatus which can correct error flexibly without wasting consumed resources while maintaining the improvement of reliability resulted from error correction. The wireless communication apparatus (relay station) | 02-18-2010 |
20100093304 | WIRELESS COMMUNICATION DEVICE AND EMERGENCY SIGNAL TRANSMISSION METHOD - Provided is a wireless communication device which can transmit an emergency signal without deteriorating data transmission efficiency. In the device, a modulating section ( | 04-15-2010 |
20100135432 | Wireless Transmission Apparatus, Wireless Reception Apparatus and Block Construction Method - A wireless transmission apparatus in which degradation of error-rate characteristics can be avoided without decreasing a data rate in the mobile communication using a pre-coding together with a FDE. In this apparatus, a modulation unit ( | 06-03-2010 |
20100142630 | MULTICARRIER TRANSMITTING APPARATUS, MULTICARRIER RECEIVING APPARATUS, AND THEIR METHODS - A multicarrier transmitting apparatus capable of improving the data symbol error rate characteristic to improve the reception quality. In this apparatus, a replacement position deciding part ( | 06-10-2010 |
20100172278 | RADIO TRANSMISSION APPARATUS AND RADIO TRANSMITTING METHOD - Provided is a radio transmission device capable of improving reception accuracy of a unicast channel received after a multicast channel. In the radio transmission device, a multicast transmission power control unit ( | 07-08-2010 |
20100172284 | Mobile Communication System, Radio Communication Relay Station Device, and Relay Transmission Method - Provided is a radio communication relay station device which can improve a line quality measurement accuracy. In the radio communication relation station ( | 07-08-2010 |
20100189192 | RADIO TRANSMISSION DEVICE, RADIO RECEPTION DEVICE, AND PRECODING METHOD - Provided is a radio transmission device which can improve an error ratio characteristic in a radio communication system which performs precoding. There are two types of modulation methods: a first modulation method having a small error ratio improvement width by precoding and a second modulation method having a large error ratio improvement width by precoding. In the radio transmission device ( | 07-29-2010 |
20100195700 | Cyclic Shift Sequence Generation Method, Radio Communication Terminal Device, and Radio Communication Base Station Device - Provided is a cyclic shift sequence generation method which can prevent coming of an interference wave into a desired wave detection window even if a cyclic shift sequence has a high mutual correlation in different bandwidths, thereby improving a channel estimation accuracy in a base station. In this method, a cyclic shift sequence number to be allocated to a cell is decided in advance. Moreover, when the cyclic shift amount between cyclic shift sequences allocated in cells is Δ | 08-05-2010 |
20100197223 | RELAY STATION, MOBILE STATION, AND RELAY TRANSMISSION METHOD IN MOBILE COMMUNICATION SYSTEM - Provided is a mobile communication system which includes a plurality of RAT (Radio Access Technology) and can eliminate the need of a control channel for reporting RAT information so as to prevent congestion or shortage of the control channel capacity. In the mobile communication system, an LTE relay station ( | 08-05-2010 |
20100232542 | RADIO TRANSMITTING APPARATUS AND MULTICARRIER SIGNAL GENERATING METHOD - A base station allowing mobile stations to efficiently remove interference signals. In this base station ( | 09-16-2010 |
20100248613 | Wireless Communication Device and Transmission Method - A wireless communication device, e.g., a mobile station, capable of performing its communication and relay processing for another mobile station, when requested, at the same time without stopping the communication and the relay processing. In the device, an outgoing/incoming call request detection unit ( | 09-30-2010 |
20100248620 | RADIO COMMUNICATION DEVICE, CRADLE DEVICE, AND RELAY TRANSMISSION METHOD - Provided is a radio communication device which can increase a relay performance of a mobile station. In this device, a connection unit ( | 09-30-2010 |
20100272201 | WIRELESS COMMUNICATION BASE STATION DEVICE, WIRELESS COMMUNICATION MOBILE STATION DEVICE, AND PROPAGATION PATH ESTIMATION METHOD - A wireless communication base station device, whereby precision of propagation path estimation is improved by making possible determination of the contiguity of precoding strings contiguous in frequency regions. In this device, a pre-coding string contiguity determining portion ( | 10-28-2010 |
20100272212 | MULTI-CARRIER TRANSMISSION DEVICE AND MULTI-CARRIER TRANSMISSION METHOD - There is provided a multi-carrier transmission device capable of improving a packet error ratio in a system where transmission data is repeatedly multi-carrier-transmitted. In this device, the transmission data is subjected to error correction encoding in an error correction encoding unit ( | 10-28-2010 |
20100279603 | RADIO COMMUNICATION APPARATUS AND RELAY TRANSMISSION METHOD - A relay transmission method for communication between a base station and a mobile station via a relay station while producing a diversity effect even if the relay station detects an error in the relay signal. A decoding section ( | 11-04-2010 |
20100284448 | WIRELESS COMMUNICATION APPARATUS - An object of the invention is to provide a wireless communication apparatus which can correct error flexibly without wasting consumed resources while maintaining the improvement of reliability resulted from error correction. The wireless communication apparatus (relay station) | 11-11-2010 |
20100297969 | RADIO TRANSMISSION DEVICE, RADIO RECEPTION DEVICE, RADIO TRANSMISSION METHOD, AND RADIO RECEPTION METHOD - A radio transmission device capable of improving the reception error rate characteristics of a receiver. In this device, an FFT (Fast Fourier Transform) unit ( | 11-25-2010 |
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 |
20100315956 | RADIO COMMUNICATION RELAY DEVICE, RADIO COMMUNICATION BASE STATION DEVICE, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - It is possible to provide a radio communication relay device, a radio communication base station device, a radio communication system, and a radio communication method which can effectively use resources and suppress a data delay and system complexity. When a terminal starts an upstream communication with a base station via a repeater in ST | 12-16-2010 |
20110002321 | RADIO TRANSMISSION DEVICE, AND RADIO TRANSMISSION METHOD - Provided are a radio transmission device and a radio transmission method, which prevent the deterioration of a preamble detecting performance while reducing the collision probability of a RACH. In this radio transmission device, a Signature table storage unit ( | 01-06-2011 |
20110026615 | METHOD AND APPARATUS FOR MULTICARRIER COMMUNICATION - A multicarrier communication method and a multicarrier communication apparatus used for the method for adjusting the arrangement in code block units according to the actual reception state of the multicarrier signal, when arranging code blocks generated through error correcting coding processing not only in the time axis direction but also in the frequency axis direction in order to improve an error correction rate of a multicarrier signal. | 02-03-2011 |
20110041045 | TRANSMITTING APPARATUS AND TRANSMITTING METHOD - A transmitting apparatus and a transmitting method wherein the systematic bit reception quality can be improved and the throughput performance can be improved. An IR parameter control part ( | 02-17-2011 |
20110051856 | WIRELESS TRANSMISSION DEVICE, WIRELESS RECEPTION DEVICE, AND SYMBOL ARRANGING METHOD - A wireless transmission device enabled to improve an error rate performance at a receiver, by acquiring at least one of frequency diversity effect and a time diversity effect while keeping the interference resistance which is acquired by diffusion. In this transmission device, a modulation unit ( | 03-03-2011 |
20110081916 | RANDOM ACCESS METHOD AND RADIO COMMUNICATION TERMINAL DEVICE - There are disclosed a random access method for establishing an individual channel between a radio communication terminal device and a base station device in a short time and a radio communication terminal device executing the random access method. In this device, in step ST | 04-07-2011 |
20110090832 | MOBILE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A mobile station wherein the power consumption can be suppressed. In a frame | 04-21-2011 |
20110096852 | RADIO RECEPTION DEVICE, RADIO TRANSMISSION DEVICE, AND FEEDBACK METHOD - Provided are a radio reception device, a radio transmission device, and a feedback method which can uniformly guarantee the feedback accuracy of an average CQI even when the transmission band width is different. A channel estimation unit ( | 04-28-2011 |
20110111693 | RADIO COMMUNICATION BASE STATION DEVICE, RADIO COMMUNICATION RELAY STATION DEVICE, RADIO COMMUNICATION TERMINAL DEVICE, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - It is possible to provide a radio communication base station device, a radio communication relay station device, a radio communication terminal device, a radio communication system, and a radio communication method which can minimize a delay and effectively use resources. When a terminal starts an uplink communication with a base station via a repeater, [ST | 05-12-2011 |
20110134864 | RADIO COMMUNICATION APPARATUS - A radio communication apparatus includes a receiving section that receives a quality indication signal from a communicating station of a communicating party, a transmitting section that transmits transmission data corresponding to the quality indication signal to the communicating station, and a non-transmission information notifying section that notifies the communicating station of the communicating party of non-transmission information indicative of not transmitting the transmission data when the apparatus does not transmit the transmission data corresponding to the quality indication signal or the apparatus cannot transmit the transmission data to the communicating station. When the communicating terminal apparatus receives the non-transmission information indicative of not transmitting the transmission data, resources are saved in that the apparatus stops awaiting the data. | 06-09-2011 |
20110134879 | WIRELESS COMMUNICATION DEVICE AND POWER DENSITY SETTING METHOD - Disclosed is a wireless communication device that, when both localized transmission and distributed transmission are used, can obtain channel estimation accuracy equivalent to that of localized transmission with distributed transmission. With this device, a setting unit ( | 06-09-2011 |
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 |
20110170425 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION SYSTEM - Disclosed is a radio communication device capable of improving the usage efficiency of resources in multi-stage relay to reduce the amount of delay of a relay signal and improving the reception quality of signals by a relay station or a base station. A transmission determining unit | 07-14-2011 |
20110170502 | WIRELESS TRANSMISSION APPARATUS AND WIRELESS TRANSMISSION METHOD - In DFT-s-OFDM, disclosed are a wireless transmission apparatus and wireless transmission method whereby freedom of allocation of frequencies is secured, while increases of CM are avoided. An SD number determination unit ( | 07-14-2011 |
20110176474 | WIRELESS RELAY STATION APPARATUS - A wireless relay station apparatus for enabling a mobile station and a base station to reliably receive network coding data and to provide sufficient reception performance is provided. (1) A repeater divides data X received from a mobile station into important data and non-important data and divides data Y received from eNB into important data and non-important data. Next, (2) the repeater places the data so that important data Sx for the mobile station and important data Sy for the eNB do not overlap, XORs (exclusive ORs) them, and generates network coding data X (X) Y. (3) The repeater applies downlink propagation inverse characteristic H | 07-21-2011 |
20110182265 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD USED FOR MULTI-CARRIER COMMUNICATION - Provided is a base station capable of suppressing increase of overhead of allocation result report in frequency scheduling in multi-carrier communication and obtaining a sufficient frequency diversity effect. In the base station, encoding units ( | 07-28-2011 |
20110216848 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part ( | 09-08-2011 |
20110223951 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided is a base station capable of performing cell search of all mobile stations having different communicable frequency band widths in a scalable band width communication system to which a multi-carrier communication method such as the OFDM method is applied. The base station includes: a modulation unit ( | 09-15-2011 |
20110228757 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided is a base station capable of performing cell search of all mobile stations having different communicable frequency band widths in a scalable band width communication system to which a multi-carrier communication method such as the OFDM method is applied. The base station includes: a modulation unit ( | 09-22-2011 |
20110243109 | RANDOM ACCESS METHOD, RADIO COMMUNICATION TERMINAL DEVICE, RECEIVING METHOD, AND BASE STATION APPARATUS - There are disclosed a random access method for establishing an individual channel between a radio communication terminal device and a base station device in a short time and a radio communication terminal device executing the random access method. In this device, in step ST | 10-06-2011 |
20110280284 | WIRELESS COMMUNICATION TERMINAL DEVICE AND METHOD OF SIGNAL DIFFUSION - Disclosed is a wireless communication terminal device that is capable of preventing inter-coding interference upon each of a plurality of base stations, even when the timing changes for a transmission of a control signal that is CoMP received by the plurality of base stations. Upon the device, a diffusion unit ( | 11-17-2011 |
20110286502 | WIRELESS TRANSMITTER AND PRECODING METHOD - Disclosed is a wireless transmitter that can prevent deterioration of the error rate characteristic without reducing the data rate during mobile communications also utilizing THP for FDE. In the device, an equivalent channel matrix computation unit ( | 11-24-2011 |
20110299407 | BASE STATION APPARATUS, TERMINAL DEVICE, AND RANK SETTING METHOD - A base station apparatus, in a wireless communication system supporting band aggregation, able to limit drops in throughput while lowering the amount of control information for the rank of an added band; and a terminal device and rank setting method of the same. An added band rank setting unit ( | 12-08-2011 |
20120008532 | WIRELESS COMMUNICATION APPARATUS AND METHOD OF TRANSMITTING SUB-PACKETS - A wireless communication apparatus enabling improved system throughput while limiting the amount of signaling for feedback information. In this apparatus, a setting unit ( | 01-12-2012 |
20120014279 | WIRELESS TRANSMISSION APPARATUS AND PRECODING METHOD - A wireless transmission apparatus able to reliably increase outage capacity according to the state of a propagation path. This apparatus is a wireless transmission apparatus ( | 01-19-2012 |
20120014373 | WIRELESS TRANSMITTER, WIRELESS RECEIVER, AND PREAMBLE SEQUENCE GENERATION METHOD - Provided is a wireless transmitter capable of accurately specifying the number of multiplexed streams and correctly decoding the data signals when a preamble sequence transmitted from any antenna of a wireless transmitter is detected. In this device, a multiplex count determination unit ( | 01-19-2012 |
20120021754 | RADIO COMMUNICATION DEVICE AND BANDWIDTH DETERMINATION METHOD - Disclosed is a radio communication device that, even when a terminal erroneously receives a retransmission grant or a response signal from a base station, can reduce the number of other terminals in which the terminal interferes at a retransmission. In this device, a determination unit ( | 01-26-2012 |
20120026948 | WIRELESS COMMUNICATION BASE STATION DEVICE AND DIVISION NUMBER DETERMINATION METHOD - Disclosed are a wireless communication base station device and a division number determination method that improves the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit ( | 02-02-2012 |
20120028684 | RADIO COMMUNICATION DEVICE AND ERROR CORRECTION/ENCODING METHOD - Provided is a radio communication device which can obtain an error ratio characteristic equivalent to the one obtained by using a tail bit, without using a tail bit in the error correction and encoding. The device includes: a blocking unit ( | 02-02-2012 |
20120057649 | RADIO TRANSMISSION APPARATUS, RADIO COMMUNICATION BASE STATION APPARATUS, RADIO COMMUNICATION MOBILE STATION APPARATUS, AND TRANSMISSION SIGNAL GENERATING METHOD - A base station allowing mobile stations to efficiently remove interference signals. In this base station, an encoding part performs an error correction encoding of transport data to generate a bit sequence comprising systematic bits and parity bits; a repetition part repeats, as a repetition subject, only the parity bits out of the plurality of bits included in the bit sequence, which is generated by the encoding part, so as to perform a rate matching; a modulating part modulates, after the repetition, the bit sequence to generate symbols; an S/P part parallel converts the symbols serially inputted from the modulating part ( | 03-08-2012 |
20120063469 | SCHEDULING DEVICE AND SCHEDULING METHOD - Provided are a scheduling device and a scheduling method, in which the amount of signaling of frequency resource allocation information can be reduced while the system throughput is maintained. In a base station device ( | 03-15-2012 |
20120069920 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part ( | 03-22-2012 |
20120093064 | WIRELESS COMMUNICATION RELAY STATION APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS, WIRELESS COMMUNICATION MOBILE STATION - There is provided a wireless communication relay station apparatus and a wireless communication base station apparatus capable of allocating resources dynamically to each apparatus in accordance with traffic. A wireless communication relay station apparatus according to the invention includes a receiver that receives data from the wireless communication base station apparatus or the wireless communication mobile station apparatus, and a selector that selects data, within an uplink subframe or a downlink subframe, from: first data to be relayed from the own apparatus to the wireless communication base station apparatus; second data to be relayed from the own apparatus to the wireless communication mobile station apparatus; third data to be relayed from the wireless communication base station apparatus to the own apparatus; and fourth data to be relayed from the wireless communication mobile station apparatus to the own apparatus. The receiver receives allocation information for switching transmission/reception in the own apparatus from the wireless communication mobile station apparatus within an uplink subframe or a downlink subframe. The selector switches the first data and the fourth data within the uplink subframe in accordance with the allocation information received by the receiver, or the selector switches the second data and the third data within the downlink subframe in accordance with the allocation information received by the receiver. | 04-19-2012 |
20120093247 | RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD - A radio transmission device capable of improving channel estimation precision for each frequency. In this device, an FFT unit ( | 04-19-2012 |
20120094709 | WIRELESS TRANSMISSION APPARATUS AND TRANSMISSION POWER CONTROL METHOD - Disclosed are a wireless transmission apparatus and transmission power control method which improve the error rate characteristics of data signals even when the number of streams of data signals increases, without increasing the amount of signaling. The relationship between the number of streams of data signals in each antenna ( | 04-19-2012 |
20120099462 | RADIO COMMUNICATION TERMINAL AND RADIO COMMUNICATION METHOD - Provided is a radio communication terminal which is capable of measuring quality in communication with a handover destination with high accuracy. The radio communication terminal is capable of communicating with a base station or a relay node, and includes: a receiver which receives control information including information relating to measurement of measuring quality of a neighbor cell; an extractor which extracts information on a subframe where the measurement should be performed, which is a subframe where only transmission of a signal from the relay node connected to the base station is performed, from the information relating to the measurement; a measurement section which performs the measurement, on a subframe basis, based on the extracted information on the subframe where the measurement should be performed: and a transmitter which transmits a result, of the measurement to the base station or the relay node. | 04-26-2012 |
20120108164 | RELAY STATION APPARATUS AND RELAY METHOD - To prevent relaying wrong information by determining whether a radio signal is to be relayed in accordance with a function of error detection in the radio signal. A relay station apparatus according to an aspect of the invention is a relay station apparatus which relays a radio signal between a transmission station and a reception station, including: a receiver which is configured to receive the radio signal from the transmission station; and a relay determination section which is configured, in accordance with a function of error detection in the radio signal received by the receiver, to determine whether the signal is to be relayed or not, based on a first channel quality indicating a channel quality from the transmission station to the relay station apparatus. | 05-03-2012 |
20120115539 | METHOD AND DEVICE FOR ADJUSTING TIMING ADVANCE IN UPLINK MULTIPLE POINTS RECEPTION - A method and device for adjusting a timing advance in a communication system composed of a mobile terminal and multiple base stations is provided. The method includes steps: the multiple base stations measures channel latencies and powers of channel responses between the mobile terminal and the multiple base stations separately; the non-serving base station in the multiple base stations reports the channel latency and the power measured to a serving base station; and the serving base station determines the timing advance of the uplink of the mobile terminal according to the channel latency and the power received and the channel latency and the power which are measured by the serving base station itself, and informs the mobile base station of the timing advance. By using the method and the device, the useful power received by the uplink multi-base stations can be optimized, and the interference power can be effectively reduced. | 05-10-2012 |
20120120884 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - Interference between users in an MU-MIMO system is minimized by effective precoding, without increasing an overhead of control data. In a wireless communication system in which multiplex communication is possible between multiple UE | 05-17-2012 |
20120120900 | MOBILE STATION APPARATUS AND COMMUNICATION METHOD - Provided is a base station capable of suppressing increase of overhead of allocation result report in frequency scheduling in multi-carrier communication and obtaining a sufficient frequency diversity effect. In the base station, encoding units ( | 05-17-2012 |
20120120901 | BASE STATION APPARATUS AND COMMUNICATION METHOD - Provided is a base station capable of suppressing increase of overhead of allocation result report in frequency scheduling in multi-carrier communication and obtaining a sufficient frequency diversity effect. In the base station, encoding units ( | 05-17-2012 |
20120120911 | RADIO COMMUNICATION BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - A base station apparatus is provided, which includes a generator configured to generate a synchronization signal and a transmitter configured to transmit the generated synchronization signal. The generator is configured to generate a synchronization signal to be mapped on a subcarrier included in one of a plurality of frequency resource candidates that are separated by an interval, which is a common multiple of a determined frequency spacing and a subcarrier spacing between contiguous subcarriers, wherein the subcarrier spacing does not have a value that is a divisor of the determined frequency spacing. | 05-17-2012 |
20120128087 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD - A wireless receiving apparatus capable of efficiently removing interference signals in a multicarrier communication. In a mobile station incorporating this wireless receiving apparatus, a selecting part selects a plurality of the same symbols in accordance with a mapping pattern established at the time of generating OFDM symbols in a base station. A correlation value calculating part determines correlation values between the subcarriers of the same symbols to generate an R-matrix, and further determines an inverse matrix of the R-matrix. An MMSE processing part performs an MMSE processing to determine a weight from both a P-vector received from a channel estimating part and the inverse matrix of the R-matrix received from the correlation value calculating part. Multipliers multiply each of the symbols selected by the selecting part by the weight determined by the MMSE processing part. A combining part combines the symbols as multiplied by the weight. | 05-24-2012 |
20120147930 | WIRELESS RELAY DEVICE AND WIRELESS RELAY METHOD - Disclosed is a wireless relay device wherein the number of stream multiplexes between a wireless transmission device and a wireless reception device can be increased without increasing the number of antennas for the wireless transmission device or the number of antennas for the wireless reception device. Specifically disclosed is a wireless relay device ( | 06-14-2012 |
20120231755 | RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD - Data streams stored in buffers are modulated by modulation sections. Multipliers multiply the signals output from the modulation sections by weights output from a weight control section. The signals output from the multipliers are added up by addition sections, subjected to radio transmission processing by transmission radio sections and sent through antennas. A buffer control section controls the buffers based on a retransmission count output from a retransmission count detection section. The weight control section outputs weights different from weights at the time of previous transmission to the multipliers every time data is retransmitted. This allows a diversity gain at the time of data retransmission to be increased even if a time variation of the propagation path environment for radio signals is slow. | 09-13-2012 |
20120263140 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, TRANSMITTING METHOD, AND RECEIVING METHOD - There is disclosed a radio transmission device capable of improving the throughput. The radio transmission device transmits a first signal and a second signal which are different from each other. In the radio transmission device, an FFT unit subjects first data to an FFT process. A sub-carrier allocation unit maps the first data which has been subjected to the FFT process and the second data into different frequencies. An IFFT unit subjects the mapped signal to the IFFT transform. A transmission radio processing unit transmits the signal which has been subjected to the IFFT processing, with a single carrier. | 10-18-2012 |
20120294229 | TERMINAL DEVICE AND INTERFERENCE REMOVAL METHOD - When a terminal ( | 11-22-2012 |
20120328056 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part ( | 12-27-2012 |
20130077466 | RADIO COMMUNICATION DEVICE AND SIGNAL DIVISION METHOD - Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit ( | 03-28-2013 |
20130100988 | WIRELESS RELAYING DEVICE, WIRELESS TRANSMISSION DEVICE, AND WIRELESS RELAYING METHOD - Provided is a wireless relaying device, wherein system capacity can be increased by reducing power consumption required for relay processing at mobile stations equipped with relaying function. This is a relaying node ( | 04-25-2013 |
20130121445 | RADIO RECEIVER APPARATUS AND RADIO TRANSMITTER APPARATUS - A radio receiver apparatus that can effectively utilize GI to improve the reception quality. In this apparatus, a data extracting part extracts a data portion of a direct wave from a signal subjected to a radio reception process by a received RF part. A GI extracting part extracts, from the signal subjected to the radio reception process by the received RF part, GI having a length determined by an extracted GI length deciding part. The extracted GI is adjusted by a data position adjusting part such that its rear end coincides with the read end of the extracted data portion. A combining part combines the extracted data portion with the GI the data position of which has been adjusted. The combined signal is then supplied to a frequency axis equalizing part, which equalizes the signal distortions of the combined signal on the frequency axis. | 05-16-2013 |
20130136085 | TERMINAL APPARATUS, BASE STATION APPARATUS, AND COMMUNICATION METHOD - Provided is a cyclic shift sequence generation method which can prevent coming of an interference wave into a desired wave detection window even if a cyclic shift sequence has a high mutual correlation in different bandwidths, thereby improving a channel estimation accuracy in a base station. In this method, a cyclic shift sequence number to be allocated to a cell is decided in advance. Moreover, when the cyclic shift amount between cyclic shift sequences allocated in cells is Δ | 05-30-2013 |
20130136088 | INTEGRATED CIRCUIT FOR COMMUNICATION RESOURCE ALLOCATION - Provided is a base station capable of suppressing increase of overhead of allocation result report in frequency scheduling in multi-carrier communication and obtaining a sufficient frequency diversity effect. In the base station, encoding units ( | 05-30-2013 |
20130142282 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided is a wireless communication apparatus wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. In the wireless communication apparatus ( | 06-06-2013 |
20130208828 | TRANSMITTING APPARATUS AND TRANSMITTING METHOD - A duplicating section duplicates a hit sequence to be input, and a 16 QAM section modulates a bit sequence of a duplicating source to form a symbol, a 16 QAM section modulates the duplicated bit sequence to form a symbol, an S/P section parallel converts the symbol sequence input in series, an S/P section parallel converts the symbol sequence input in series, and an IFFT section provides IFFT processing to the input symbol sequence. Since each of multiple same bits duplicated by the duplicating section is included in a different symbol, each of the multiple same bits is allocated to each of multiple subcarriers each having a different frequency by IFFT processing. As a result, a multicarrier signal including the multiple same bits each having a different frequency is generated. | 08-15-2013 |
20130279403 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - Overhead related to precoding (beamforming weight) information to be notified over a backhaul may be reduced while maintaining an ICI reduction effect by coordinated CoMP among a plurality of nodes. A communication apparatus of the invention includes a reception unit that receives precoding information from user equipment, a selection unit that variably controls an amount of the precoding information, which is to be notified to another communication apparatus via a backhaul, in response to positions of frequency resources, and a transmission unit that transmits the precoding information to the other communication apparatus in accordance with the amount of the precoding information controlled by the selection unit. | 10-24-2013 |
20130301594 | INTEGRATED CIRCUIT FOR CONTROLLING RADIO TRANSMISSION OF ACK/NACK INFORMATION - A radio receiver apparatus that can effectively utilize GI to improve the reception quality. In this apparatus, a data extracting part extracts a data portion of a direct wave from a signal subjected to a radio reception process by a received RF part. A GI extracting part extracts, from the signal subjected to the radio reception process by the received RF part, GI having a length determined by an extracted GI length deciding part. The extracted GI is adjusted by a data position adjusting part such that its rear end coincides with the read end of the extracted data portion. A combining part combines the extracted data portion with the GI the data position of which has been adjusted. The combined signal is then supplied to a frequency axis equalizing part, which equalizes the signal distortions of the combined signal on the frequency axis. | 11-14-2013 |
20140064241 | COMMUNICATION APPARATUS AND A COMMUNICATION METHOD - Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit ( | 03-06-2014 |
20140064408 | INTEGRATED CIRCUIT FOR CONTROLLING A PROCESS - Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into ‘1’ or ‘0’. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated. | 03-06-2014 |
20140169205 | RADIO COMMUNICATION TERMINAL AND RADIO COMMUNICATION METHOD - Provided is a radio communication terminal which is capable of measuring quality in communication with a handover destination with high accuracy. The radio communication terminal is capable of communicating with a base station or a relay node, and includes: a receiver which receives control information including information relating to measurement of measuring quality of a neighbor cell; an extractor which extracts information on a subframe where the measurement should be performed, which is a subframe where only transmission of a signal from the relay node connected to the base station is performed, from the information relating to the measurement; a measurement section which performs the measurement, on a subframe basis, based on the extracted information on the subframe where the measurement should be performed; and a transmitter which transmits a result of the measurement to the base station or the relay node. | 06-19-2014 |
20140177624 | MOBILE STATION APPARATUS, RECEPTION METHOD AND INTEGRATED CIRCUIT - A base station apparatus is provided, which includes a generator configured to generate a synchronization signal and a transmitter configured to transmit the generated synchronization signal. The generator is configured to generate a synchronization signal to be mapped on a subcarrier included in one of a plurality of frequency resource candidates that are separated by an interval, which is a common multiple of a determined frequency spacing and a subcarrier spacing between contiguous subcarriers, wherein the subcarrier spacing does not have a value that is a divisor of the determined frequency spacing. | 06-26-2014 |
20140177650 | RADIO RECEIVER APPARATUS AND RADIO TRANSMITTER APPARATUS - A radio receiver apparatus that can effectively utilize GI to improve the reception quality. In this apparatus, a data extracting part extracts a data portion of a direct wave from a signal subjected to a radio reception process by a received RF part. A GI extracting part extracts, from the signal subjected to the radio reception process by the received RF part, GI having a length determined by an extracted GI length deciding part. The extracted GI is adjusted by a data position adjusting part such that its rear end coincides with the read end of the extracted data portion. A combining part combines the extracted data portion with the GI the data position of which has been adjusted. The combined signal is then supplied to a frequency axis equalizing part, which equalizes the signal distortions of the combined signal on the frequency axis. | 06-26-2014 |
20140254571 | RANDOM ACCESS METHOD, RADIO COMMUNICATION TERMINAL DEVICE, RECEIVING METHOD, AND BASE STATION APPARATUS - Random access technology is provided for establishing an individual channel between a radio communication terminal device and a base station device in a short time and a radio communication terminal device executing the random access method. A RACH sub-channel allocation unit allocates a transmission packet input from a replication unit to an arbitrary sub-carrier at the RACH arbitrary time slot at random. An allocation unit judges whether an overlap is generated in the allocation result obtained by the RACH sub-channel allocation unit. | 09-11-2014 |
20140286272 | INTEGRATED CIRCUIT FOR CONTROLLING A PROCESS - Provided is a cyclic shift sequence generation method which can prevent coming of an interference wave into a desired wave detection window even if a cyclic shift sequence has a high mutual correlation in different bandwidths, thereby improving a channel estimation accuracy in a base station. In this method, a cyclic shift sequence number to be allocated to a cell is decided in advance. Moreover, when the cyclic shift amount between cyclic shift sequences allocated in cells is Δ1 and the cyclic shift amount of the cyclic shift sequences allocated between the cells is Δ2, Δ1 and Δ2 are made different when generating a cyclic shift sequence. | 09-25-2014 |
20140307829 | TRANSMITTING APPARATUS AND TRANSMITTING METHOD - A duplicating section duplicates a bit sequence to be input, and a 16QAM section modulates a bit sequence of a duplicating source to form a symbol, a 16QAM section modulates the duplicated bit sequence to form a symbol, an S/P section parallel converts the symbol sequence input in series, an S/P section parallel converts the symbol sequence input in series, and an IFFT section provides IFFT processing to the input symbol sequence. Since each of multiple same bits duplicated by the duplicating section is included in a different symbol, each of the multiple same bits is allocated to each of multiple subcarriers each having a different frequency by IFFT processing. As a result, a multicarrier signal including the multiple same bits each having a different frequency is generated. | 10-16-2014 |
20140321573 | RADIO COMMUNICATION APPARATUS AND COMMUNICATION METHOD - Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into or ‘0’ or ‘0’. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated. | 10-30-2014 |