Patent application number | Description | Published |
20090060100 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus capable of enhancing the transmission efficiency, while maintaining a good BER characteristic. In this apparatus, a setting part ( | 03-05-2009 |
20090088212 | RADIO BASE STATION APPARATUS - Even when terminals having different bandwidths require different amounts of BCH information, a radio base station apparatus in a scalable bandwidth system can transmit the BCH information required by the terminals. A base station ( | 04-02-2009 |
20090104877 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A CIR measuring section | 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 |
20090141818 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD IN MULTICARRIER COMMUNICATION - A wireless communication apparatus capable of performing an efficient communication even in a case of frequency multiplexing a plurality of OFDM symbols having GIs the lengths of which are different from each other in a multicarrier communication. In this wireless communication apparatus ( | 06-04-2009 |
20090147757 | BASE STATION DEVICE AND MOBILE STATION DEVICE - There are provided a base station device and a mobile station device for increasing the speed of cell search by introducing identification of TTI timing into the cell search. In the base station device ( | 06-11-2009 |
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 |
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 |
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 |
20090285174 | COMMUNICATION TERMINAL APPARATUS, CONTROL STATION, AND MULTICARRIER COMMUNICATION METHOD - A communication terminal apparatus wherein a base station apparatus uses only subcarriers, which provide good propagation circumstance for the communication terminal apparatus, to transmit data, thereby improving the transmission efficiency of the whole system and wherein the frequency scheduling is performed in view of whether the user exists in a handover area, thereby providing a site diversity effect and hence improving the reception quality and the throughput. In this apparatus, a cell-# | 11-19-2009 |
20100014601 | RETRANSMISSION OF DATA IN A MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEM - A method for retransmission of data in a multiple input multiple output (MIMO) system, the method comprising space-time block code (STBC) encoding multiple data streams including one or more retransmission data streams using a STBC matrix, the STBC matrix multiplying at least one of the retransmission data streams with respective variable weighting factors. | 01-21-2010 |
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 |
20100157884 | BASE STATION DEVICE AND MOBILE STATION DEVICE - A base station device and a mobile station device both enabling improvement of the reception quality of transmission data at a mobile station by preventing a sequence for establishing synchronism and the transmission data from interfering with each other. In the base station device ( | 06-24-2010 |
20100172286 | RADIO COMMUNICATION BASE STATION APPARATUS AND PILOT TRANSMISSION METHOD - Provided is a base station capable of giving a pilot appropriate for both of multicast data and unicast data which are frequency-multiplexed. In a pilot generation unit ( | 07-08-2010 |
20100211844 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - Lowering of the frequency use efficiency and throughput is prevented while the blanking advantage is provided at the retransmission time in MCW using a plurality of streams per codeword. In a wireless communication apparatus for using a plurality of streams per codeword and performing data transmission according to a plurality of codewords, when two codewords are transmitted using four streams, for example, from a base station | 08-19-2010 |
20100229065 | RADIO RECEPTION DEVICE, RADIO TRANSMISSION DEVICE, AND RADIO COMMUNICATION METHOD - It is possible to provide a radio transmission device, a radio reception device, and a radio communication method which can suppress increase of the feedback overhead and improve the throughput characteristic. In ST | 09-09-2010 |
20100251057 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - Information on other code words can be utilized at the time of retransmitting, and transmission characteristics of the case of using multiple code words are improved. In a radio communication apparatus for transmitting data using multiple code words, as response time taken by a transmitting station to receive a response signal (Ack/Nack signal) after the data is transmitted from the transmitting station (BS) to a receiving station (UE), a cycle of second response time (RTT | 09-30-2010 |
20100273438 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD IN MULTI-CARRIER COMMUNICATION - Provided is a radio communication device capable of preventing lowering of the frequency diversity effect when using the CDD (Cyclic Delay Diversity) in combination with the frequency diversity technique in a multi-carrier communication. In the radio communication device ( | 10-28-2010 |
20100275090 | RADIO COMMUNICATION APPARATUS AND PUNCTURING METHOD - A radio communication apparatus is provided that enables degradation of error rate performance due to puncturing to be minimized when an LDPC code is used as an error correcting code. In this apparatus, a padding bit insertion section | 10-28-2010 |
20100278153 | WIRELESS COMMUNICATION APPPARATUS, WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION SYSTEM - The error rate characteristic in a wireless communication apparatus for relaying communications between a mobile station and a base station is improved. For the modulation level of the resource for network coding, the modulation level from a relay station to the mobile station or the modulation level from the relay station to the base station, whichever is lower, is selected and thus the modulation level becomes QPSK. The relay station preferentially assigns S | 11-04-2010 |
20100309870 | CONTROL CHANNEL SIGNALING USING A COMMON SIGNALING FIELD FOR TRANSPORT FORMAT AND REDUNDANCY VERSION - The invention relates to a method for providing control signalling associated to a protocol data unit conveying user data in a mobile communication system and to the control channel signal itself. Furthermore, the invention also provides a mobile station and a base station and their respective operation in view of the newly defined control channel signals defined herein. In order to reduce the control channel overhead, the invention suggests defining a common field for the transport format and redundancy version in the control channel information format. According to one approach, the common field is used to jointly encode transport format and redundancy version therein. According to another aspect, one shared field is provided on the control channel signal that indicates either a transport format or a redundancy version depending of whether the control channel signal relates to an initial transmission or a retransmission. In another embodiment, further enhancements to a HARQ protocol are suggested for addressing certain error cases. | 12-09-2010 |
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 |
20110007834 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing the overhead of retransmission control signaling. In a case where a retransmission control method is employed in consideration of adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>2/3, two bits are set. In a case where the encoding rate 1/301-13-2011 | |
20110009052 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - There are provided a wireless communication apparatus, a wireless communication method, and a wireless communication system capable of selectively utilizing the advantages of both centralized control and distributed control while a time needed for cell searching is suppressed. FIG. | 01-13-2011 |
20110026635 | WIRELESS RECEIVER, WIRELESS TRANSMITTER, AND FEEDBACK METHOD - Provided are a wireless receiver, a wireless transmitter, and a feedback method, with which the amount of CQI feedback in a MIMO channel is reduced. A channel estimation section ( | 02-03-2011 |
20110070891 | WIRELESS COMMUNICATION BASE STATION APPARATUS AND REFERENCE SIGNAL ALLOCATION METHOD - Disclosed is a wireless communication base station apparatus capable of preventing degradation of throughput of LTE terminals, even when both LTE terminals and LTE+ terminals are present together. In this apparatus, a CCE allocation section ( | 03-24-2011 |
20110092154 | RADIO COMMUNICATION DEVICE - Disclosed is a radio communication device capable of using a resource in which the signal cannot be received by all relay stations participating in cooperative relay for a cooperative relay. A signal-receivable frequency resource determination unit | 04-21-2011 |
20110103297 | WIRELESS COMMUNICATION APPARATUS - A repeater capable of improving the data decoding performance at a base station while achieving sharing of processing for data exchange between repeaters and initial data transmission to the base station (eNB) is provided. A repeater | 05-05-2011 |
20110134870 | FREQUENCY BAND ALLOCATION METHOD AND TRANSMISSION DEVICE - Disclosed is a frequency band allocation method which reduces PAPR (peak to average power ratio) when performing a single carrier transmission in the uplink line of an LTE+ (LTE Advanced) system in a system using both of an LTE (Long Term Evolution) system and the LTE+ system. In the frequency band allocation method, a UL band for the LTE is arranged adjacently in a lower frequency band than the UL band for the LTE+. With this arrangement, it is possible to prevent division of the band for the LTE+by the uplink line control channel (such as PUCCH) transmitted by an LTE mobile station and to allocate a wide band continuously with the LTE+ mobile station. Especially when the LTE+ mobile station performs a single carrier transmission with the uplink line, the PAPR can be reduced since it is possible to allocate a band continuous with the single carrier signal. | 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 |
20110167312 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Provided are a radio transmission device and a radio transmission method which can reduce the transmission packet collision generation ratio even when no resource allocation signal is detected in retransmission. When control information outputted from a decoding unit ( | 07-07-2011 |
20110167326 | RELAY APPARATUS AND WIRELESS COMMUNICATION SYSTEM - A relay station and a wireless communication system wherein novel retransmission control is achieved in cases when a TTI-bundling technique and a relay technique are used in communication between a terminal and a base station. A relay 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 |
20110173519 | WIRELESS COMMUNICATION APPARATUS AND ERROR DETECTION RESULT FEEDBACK METHOD - A wireless communication apparatus and an error detection result feedback method wherein unnecessary retransmissions are avoided to improve the system throughput. At a base station ( | 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 |
20110194515 | BASE STATION, TERMINAL, BAND ALLOCATION METHOD, AND DOWNLINK DATA COMMUNICATION METHOD - Provided are a base station, a terminal, a band allocation method, and a downlink data communication method with which bands can be efficiently allocated. In a base station ( | 08-11-2011 |
20110194639 | BASE STATION, TERMINAL, BAND ALLOCATION METHOD, AND DOWNLINK DATA COMMUNICATION METHOD - Provided are a base station, a terminal, a band allocation method, and a downlink data communication method in which a mapping method for synchronization signals and report signals is implemented with high resource usage efficiency when a first system in which an independent single communication is allocated to a unit band co-exists with a second system in which a plurality of unit bands can be allocated to a single communication. In a base station ( | 08-11-2011 |
20110205966 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Provided are a radio transmission device and a radio transmission method which can suppress lowering of the throughput caused by switching between the single carrier communication method and the multi-carrier communication method while suppressing increase of the signaling amount. A PHR threshold value setting unit ( | 08-25-2011 |
20110216845 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit ( | 09-08-2011 |
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 |
20130121202 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - A CIR measuring section measures CIRs of all blocks received and a block selection section makes a threshold decision based on the CIR measurement result and threshold information according to an amount of traffic in the own cell and neighboring cells. As a result of the threshold decision, blocks whose CIRs exceed the threshold are regarded as usable blocks. A CIR averaging section averages the CIRs of the usable blocks and a CQI generation section generates a CQI based on the CIR average value. The CQI generated and selected block numbers are reported to a base station apparatus. This allows the throughput of the own cell and neighboring cells to be improved. | 05-16-2013 |
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 |
20130128849 | CONTROL CHANNEL SIGNALING USING A COMMON SIGNALING FIELD FOR TRANSPORT FORMAT AND REDUNDANCY VERSION - The invention relates to a method for providing control signalling associated to a protocol data unit conveying user data in a mobile communication system and to the control channel signal. The invention also provides a mobile station and a base station and their respective operation in view of the newly defined control channel signals. To reduce the control channel overhead, the invention suggests defining a common field for the transport format and redundancy version in the control channel information format. According to one approach, the common field is used to jointly encode transport format and redundancy version therein. According to another aspect, one shared field is provided on the control channel signal that indicates either a transport format or a redundancy version depending of whether the control channel signal relates to an initial transmission or a retransmission. In another embodiment, further enhancements to a HARQ protocol are suggested for addressing certain error cases. | 05-23-2013 |
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 |
20130148602 | TERMINAL RECEIVING RESOURCE BLOCK ALLOCATION AND METHOD THEREFOR - In a wireless communication base station device, a modulation unit carries out modulation processing for Dch data after coding to generate a Dch data symbol. A modulation unit carries out modulation processing for Lch data after coding to generate an Lch data symbol. An allocation unit allocates the Dch data symbol and Lch data symbol to each sub-carrier composing an OFDM symbol and outputs the allocated sub-carrier to a multiplex unit. In this case, the allocation unit allocates the Dch data symbol to a plurality of resource blocks where one Dch is arranged at an interval equal to integral multiples of the number of resource blocks composing a resource block group. | 06-13-2013 |
20130251002 | TERMINAL APPARATUS AND COMMUNICATION METHOD - In order to reduce interference between cells through hopping and use frequencies in a good propagation situation, a scheduler section carries out scheduling for determining to which user data should be sent using CQI from each communication terminal apparatus, selects a user signal to be sent in the next frame and determines in which subcarrier block the data should be sent. Au MCS decision section selects a modulation scheme and coding method from the CQI of the selected user signal. A subcarrier block selection section selects a subcarrier block instructed by the scheduler section | 09-26-2013 |
20130286975 | RADIO COMMUNICATION DEVICE AND RESPONSE SIGNAL SPREADING METHOD - A radio communication device capable of randomizing both inter-cell interference and intra-cell interference. In this device, a spreading section primarily spreads a response signal in a ZAC sequence set by a control unit. A spreading section secondarily spreads the primarily spread response signal in a block-wise spreading code sequence set by the control unit. The control unit controls the cyclic shift amount of the ZAC sequence used for the primary spreading in the spreading section and the block-wise spreading code sequence used for the secondary spreading in the spreading section according to a set hopping pattern. The hopping pattern set by the control unit is made up of two hierarchies. An LB-based hopping pattern different for each cell is defined in the first hierarchy in order to randomize the inter-cell interference. A hopping pattern different for each mobile station is defined in the second hierarchy to randomize the intra-cell interference. | 10-31-2013 |
20130294251 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing overhead of retransmission control signaling. Where a retransmission control method is employed with adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>⅔, two bits are set. In a case where the encoding rate ⅓11-07-2013 | |
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 |
20130315173 | INTEGRATED CIRCUIT FOR RADIO TRANSMISSION OF ACK/NACK SIGNAL - It is possible to improve the CQI reception performance even when a delay is caused in a propagation path, a transmission timing error is caused, or a residual interference is generated between cyclic shift amounts of different ZC sequences. For the second symbol and the sixth symbol of the ACK/NACK signal which are multiplexed by RS of CQI, (+, +) or (−, −) is applied to a partial sequence of the Walsh sequence. For RS of CQI transmitted from a mobile station, + is added as an RS phase of the second symbol and − is added as an RS phase of the sixth symbol. A base station ( | 11-28-2013 |
20130336265 | MOBILE STATION AND RECEPTION METHOD - Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port. | 12-19-2013 |
20130343294 | RADIO TRANSMISSION DEVICE AND RADIO COMMUNICATION METHOD - A radio transmission device and a radio communication method employ sequence length decision units which hold a correspondence in which one basic sequence length is set for a plurality of transmission bandwidths. The sequence length decision units acquire transmission bandwidth information and decide a sequence length corresponding to the acquired transmission bandwidth information. A decision is made as to which of the cyclic extension process or the truncation process is to be executed on a Zadoff-Chu sequence according to the sizes of the acquired transmission bandwidth information and the basic sequence length. Then, a difference between the transmission bandwidth and the basic sequence length, i.e., the number of possible cyclic extension/truncation symbols, is obtained. | 12-26-2013 |
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 |
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 |
20140185561 | RADIO COMMUNICATION DEVICE AND RESPONSE SIGNAL SPREADING METHOD - A radio communication device capable of randomizing both inter-cell interference and intra-cell interference. In this device, a spreading section primarily spreads a response signal in a ZAC sequence set by a control unit. A spreading section secondarily spreads the primarily spread response signal in a block-wise spreading code sequence set by the control unit. The control unit controls the cyclic shift amount of the ZAC sequence used for the primary spreading in the spreading section and the block-wise spreading code sequence used for the secondary spreading in the spreading section according to a set hopping pattern. The hopping pattern set by the control unit is made up of two hierarchies. An LB-based hopping pattern different for each cell is defined in the first hierarchy in order to randomize the inter-cell interference. A hopping pattern different for each mobile station is defined in the second hierarchy to randomize the intra-cell interference. | 07-03-2014 |
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 |
20140348119 | TERMINAL AND METHOD FOR TRANSMITTING A TRANSMISSION SIGNAL - Disclosed are a wireless communication base station device and a division number determination method that improve 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 determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit. | 11-27-2014 |
20150074482 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing overhead of retransmission control signaling. Where a retransmission control method is employed with adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>2/3, two bits are set. In a case where the encoding rate 1/303-12-2015 | |
20150078313 | BASE STATION, TERMINAL, BAND ALLOCATION METHOD, AND DOWNLINK DATA COMMUNICATION METHOD - Provided are a base station, a terminal, a band allocation method, and a downlink data communication method with which bands can be efficiently allocated. In a base station in which a plurality of unit bands can be allocated to a single communication, when a data receiver acquires terminal capability information transmitted by a terminal in the initial access unit band and the bandwidth available for communication indicated by the terminal capability information can accommodate a plurality of unit bands, a unit band group which includes the initial access unit band as well as the unit bands adjacent thereto is allocated to the terminal, and a communication band movement indication, which indicates the movement of the center frequency in the communication band of the terminal toward the center frequency in the unit band group, is transmitted to the terminal using the initial access unit band. | 03-19-2015 |
20150078330 | BASE STATION, TERMINAL, BAND ALLOCATION METHOD, AND DOWNLINK DATA COMMUNICATION METHOD - Provided are a base station, a terminal, a band allocation method, and a downlink data communication method in which a mapping method for synchronization signals and report signals is implemented with high resource usage efficiency when a first system in which an independent single communication is allocated to a unit band co-exists with a second system in which a plurality of unit bands can be allocated to a single communication. In a base station, an OFDM signal generation unit maps primary synchronization channel (P-SCH), secondary synchronization channel (S-SCH), primary broadcast channel (P-BCH), and dynamic broadcast channel (D-BCH), which can be decoded by both an LTE terminal and an LTE+ terminal, to some of a plurality of unit bands. The OFDM signal generation unit also maps D-BCH+, which can be decoded only by an LTE+ terminal, to all of the plurality of unit bands to produce a multiplexed transmission signal. | 03-19-2015 |