| Patent application number | Description | Published |
|---|
| 20080304446 | Frequency division communication system - An orthogonal frequency division communication system which enables flexible modification of the ratio of allocation between uplink and downlink transmissions, while maintaining advantages similar to those of TDD (Time Division Duplex) systems, has a base station and a plurality of mobile stations connected by uplinks and downlinks, and a plurality of mutually orthogonal frequencies are allocated, on the frequency axis and on the time axis, to the uplinks and downlinks and to the plurality of mobile stations. | 12-11-2008 |
| 20090175228 | Base Station And Method Of Assigning Frequencies To Pilot Sequences - A base station that assigns frequencies to UP link pilot signals in a radio communication system, where the base station stores the correlation between each of a plurality of pilot sequences having different Peak to Average Power characteristics and a plurality of frequencies that are used for transmitting the pilot sequence by frequency multiplexing, and makes the correlation between each of said pilot sequences and said assigned frequencies in adjacent cells or sectors different. Moreover, the base station measures the reception quality of signals received from a user terminal, makes reference to the stored correlation and finds a pilot sequence having Peak to Average Power characteristic that correspond to said reception quality, then sends an instruction to the user terminal so that the user terminal transmits the pilot sequence using the frequencies assigned to this pilot sequence. | 07-09-2009 |
| 20090190685 | MIMO COMMUNICATION SYSTEM AND TRANSMISSION STATION - An imbalanced amplitude is produced to a pair of weighing factors (U | 07-30-2009 |
| 20090219876 | RADIO RESOURCE ALLOCATION CONTROL APPARATUS AND METHOD AND BASE STATION - A radio resource allocation control apparatus for controlling allocation of radio resources used in communication by a plurality of user equipment in a wireless communication system, the apparatus including a selecting unit for selecting a user equipment to which the allocation is performed by using a priority evaluation formula in which a plurality of user equipment having wireless communication characteristics that have a higher tendency of being selected as a target of the allocation vary when different coefficients are imparted. The apparatus includes a control unit for controlling the coefficients individually for the radio resources. | 09-03-2009 |
| 20090252112 | RADIO COMMUNICATION METHOD AND A BASE STATION AND USER TERMINAL THEREOF - In a radio communication system, each of user terminals together with transmitting a data signal to a base station using different data transmission band frequencies that are assigned by a base station, performs time-division multiplexing of a pilot signal with the data signal and transmit the resulting signal to the base station. A resource management unit of the base station decides pilot transmission bands for each user terminal so that the pilot transmission band covers the data transmission band for each user terminal by frequency offset, and instructs the user terminal to transmit pilot signals using the decided pilot transmission band frequencies. Thereby the base station can estimate channel for each frequency of the data transmission band using the pilot signal. | 10-08-2009 |
| 20090287981 | Construction of Parity-Check Matrices for Non-Binarys LDPC Codes - A parity check matrix construction method for constructing a non-binary parity check matrix defining a non-binary LDPC code. In particular, a parity check matrix construction method for setting codewords able to stably give a superior decoding performance is provided. For this reason, the non-binary non-zero elements are selected so that the determinants of the partial matrices corresponding to the cycles in the parity check matrix do not become 0. Due to this, a non-binary parity check matrix able to give large weight codewords is constructed. | 11-19-2009 |
| 20090303868 | Control Channel Transmission Method And Radio Communication Apparatus - A control channel transmission method in a radio communication apparatus which has a plurality of antennas, including, generating signal which are orthogonal to each other on a frequency axis between each of the antennas; modulating the signal using a control signal corresponding to a control channel respectively; and transmitting the modulated signal from each of the antennas using a single carrier transmission. | 12-10-2009 |
| 20100040086 | RADIO COMMUNICATION APPARATUS AND COMMUNICATION METHOD - In a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, a receive state acquisition section acquires a receive state of each mobile station, a frame format decision section decides a frame format of which guard interval length is different for each slot based on the receive state of each mobile station, a slot assignment section assigns each slot of the frame format to data for each mobile station, and a frame format reporting section reports the decided frame format to the mobile stations via a reporting channel. The mobile station identifies the GI length based on the reported frame format and the slot number, removes the guard interval, and performs processing. | 02-18-2010 |
| 20100107031 | MULTIPLE-INPUT-MULTIPLE-OUTPUT TRANSMISSION USING NON-BINARY LDPC CODING - A wireless communication system constructed by a MIMO antenna system and transmitting information from a transmitter having Nt number of transmitting antennas to a receiver | 04-29-2010 |
| 20100172373 | CONTROL DATA COMMUNICATION METHOD AND APPARATUS THEREOF - A control data communication method for multiplexing and transmitting a plurality of mutually independent types of control data by using a control channel and for separating the control data received from the control channel includes changing and transmitting patterns of reference signals included in the control channel according to a format for multiplexing the control data, detecting the format for multiplexing the transmitted control data according to the pattern of the reference signals included in the control channel, and separating the control data in correspondence with the detected format. | 07-08-2010 |
| 20100309865 | TERMINAL DEVICE AND BASE STATION DEVICE - A base station measures a signal to interference power ratio using a control signal received from a terminal device through wireless communication, and decides an MCS value indicating a combination of a modulation scheme and a channel code rate. The base station includes the decided MCS value in uplink-channel transmission information and transmits the MCS value to the terminal device by using a control channel including downlink scheduling information. The terminal device decides a transmission format of an uplink data channel based on the MCS in the uplink-channel transmission information. The terminal device, when having received a downlink data channel from the base station, decides a response content (ACK/NACK/DTX) to the base station, based on the result of decoding the downlink data channel. Thereafter, the terminal device transmits the decided response content to the base station through the uplink data channel using the decided transmission format. | 12-09-2010 |
| 20110053589 | BASE STATION, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A base station used in a communication system wherein user terminals are classified into cell center terminals and cell edge terminals, based on reception quality and includes a receiving unit that receives cell edge band information transmitted from another base station and indicative of a cell edge band allocated to a cell edge terminal in a nearby cell; a determining unit that determines a cell edge band for a cell of the base station, based on the cell edge band information for a plurality of nearby cells and received by the receiving unit; and a communicating unit that, via the cell edge band determined by the determining unit, communicates with the cell edge terminals in the cell of the base station. | 03-03-2011 |
| 20110135041 | RECEIVER AND METHOD FOR RECEIVING - A procedure of receiving includes estimating a phase offset of a received signal and calculating one or more phase offsets which result in the estimated phase offset of the received signal and which have different phase rotation directions and/or different phase rotation amounts from one another; compensating for the phase offset of the received signal, using each of a plurality of phase offsets that are the estimated phase offset and the calculated phase offsets, and demodulating and decoding the plurality of compensated received signals; and selecting a decoding result that is the most likely to be the received signal among a plurality of results of the decoding corresponding one for each of the plurality of phase offsets. | 06-09-2011 |
