Patent application number | Description | Published |
20100158080 | WIRELESS RECEPTION DEVICE, WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - A wireless reception device which communicates with a wireless transmission device which has a plurality of transmission antennas, includes at least one reception antenna which receives a plurality of transmission signals transmitted from the plurality of transmission antennas of the wireless transmission device; a channel response estimation unit which estimates a channel response between a plurality of transmission antennas and the reception antenna; a block dividing unit which divides a reception signal of at least one reception antennas into a plurality of blocks; and a transmission signal detection unit which detects the plurality of transmission signals transmitted by the wireless transmission device based on a plurality of reception signals divided by the block dividing unit and the channel response estimated by the channel response estimation unit. | 06-24-2010 |
20100183094 | RECEPTION DEVICE AND RECEPTION METHOD - A reception device includes a block division setting unit which sets a block division setting value based on an arrived delay wave group, a replica signal generating unit which generates a replica signal which is a replica of a transmitted signal based on a received signal, a delay wave removing unit which removes delay waves from the received signal for every time period, the removals being performed by using the block division setting value set by the block division setting unit and the replica signal, a combining unit which combines the signal from which the delay wave was removed, the combining being performed by the combining unit for every time period, and a determining unit which makes determination on the signal combined by the combining unit. | 07-22-2010 |
20110038430 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, COMMUNICATION SYSTEM, TRANSMISSION METHOD AND RECEPTION METHOD - Data errors are sufficiently corrected and desired transmission quality is obtained even when the time variation of fading is large in a multicarrier transmission scheme communication system to which HARQ is applied. A transmission apparatus | 02-17-2011 |
20110206031 | RECEIVER AND RECEIVING METHOD - A receiver includes a replica signal generating unit which generates a replica signal as a replica of a transmission signal based on a received signal; a time zone setting unit which sets a plurality of time zones to be extracted such that a part of a signal interval of the received signal is included in the plurality of time zones to be extracted; a signal extracting unit which extracts a signal in a predetermined time zone of the received signal based on the replica signal and a time zone which is set by the time zone setting unit; a combining unit which combines signals of the respective time zones extracted by the signal extracting unit; and a decoding processing unit which carries out decoding on the signal combined by the combining unit. | 08-25-2011 |
20120201333 | RECEIVER AND RECEIVING METHOD - Disclosed is a receiver in a communication system provided with one transmitting station or two or more transmitting stations and the receiver for reception from the transmitting stations. For a case where identical signals are sent from the one transmitting station or the two or more transmitting stations, the receiver includes a first demodulator which executes demodulation processing of the signals as a single signal group, a second demodulator which executes demodulation processing of the signals as multiple signal groups, a determination unit which discriminates between the single signal group and the multiple signal groups, and a control unit which controls which one of the first demodulator and the second demodulator is to execute the demodulation processing based on a determination result by the determination unit. | 08-09-2012 |
20120219079 | RECEIVING DEVICE, RECEIVING METHOD, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - Provided is a receiving device including: a receiving unit that receives a multicarrier modulation signal; an interference cancelling unit that removes a modulation symbol replica generated using a decoding process result, from the signal received by the receiving unit, and outputs the resultant signal; and a signal detecting unit that decodes the signal outputted by the interference cancelling unit, and outputs the decoding process result. The interference cancelling unit generates the modulation symbol replica with the use of the decoding process result of part of data modulation symbols constituting the signal received by the receiving unit. | 08-30-2012 |
20120230445 | RECEPTION DEVICE, RECEPTION METHOD, AND RECEPTION PROGRAM - A propagation channel estimation unit estimates a propagation channel estimated value. A symbol replica generation unit generates a symbol replica which is a modulated symbol from demodulated information. A signal extraction unit extracts each subcarrier component from a received signal from which interference has been removed, based on the propagation channel estimated value and the symbol replica. A demodulation unit demodulates the signals of the subcarrier components extracted by the signal extraction unit. | 09-13-2012 |
20130003901 | RECEIVING DEVICE, RECEIVING METHOD, RECEIVING PROGRAM, AND PROCESSOR - A propagation channel estimation unit estimates a propagation channel estimation value. A symbol replica generation unit generates a symbol replica that is modulated symbol of a demodulated information. A signal extraction unit extracts, in an arbitrary time duration, each subcarrier component of a received signal in which an interference signal was removed, the extraction being made based on the propagation channel estimation value and the symbol replica. A demodulator demodulates a signal of each subcarrier component in the received signal, the demodulation being made based on signal during the time duration extracted by the signal extraction unit. | 01-03-2013 |
20130182802 | RECEIVER APPARATUS, RECEPTION METHOD, AND RECEPTION PROGRAM - A receiver apparatus includes a propagation channel estimating unit that estimates a propagation channel. The propagation channel estimating unit includes a path detector unit that repeatedly performs a process of detecting paths in the order of increase in a propagation channel goodness of fit. The receiver apparatus that estimates a propagation channel at a high accuracy level with a small amount of calculation operation involved is thus provided. | 07-18-2013 |
20130308716 | WIRELESS COMMUNICATION SYSTEM, RECEPTION DEVICE, AND TRANSMISSION DEVICE - A wireless communication system includes a plurality of transmission devices, each of which transmits signals resulting from precoding performed for a plurality of resources, and a reception device that receives at least one desired signal and a plurality of undesired signals, the number of which is greater than or equal to the degree of freedom that the plurality of resources have. The at least one desired signal and the plurality of undesired signals have been transmitted from the transmission devices. The plurality of resources is the unit of precoding. At least one of the plurality of transmission devices transmits signals on each of which precoding has been performed such that equivalent channel vectors of the plurality of undesired signals in the reception device are made to be orthogonal to a reception weight vector used in the reception device. The reception device estimates equivalent channel vectors of the plurality of undesired signals, calculates a reception weight vector by using the estimated equivalent channel vectors of the plurality of undesired signals, and extracts a desired signal by multiplying a reception signal received using the plurality of resources and the calculated reception weight vector together. The plurality of resources is the unit of precoding. As a result, in a system in which IA is used, the degradation of reception characteristics may be suppressed even under circumstances in which a CSI error occurs. | 11-21-2013 |
20130308733 | RECEIVER APPARATUS, RECEPTION METHOD, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A receiver apparatus includes a channel estimator (b | 11-21-2013 |
20140192936 | RECEIVING DEVICE, RECEIVING METHOD, AND RECEIVING PROGRAM - To provide a receiving device, a receiving method, and a receiving program, which are capable of reducing performance degradation in a case where the spatial correlation of a channel becomes high. | 07-10-2014 |
20140241470 | RECEIVER APPARATUS, RECEPTION METHOD, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A receiver apparatus includes a first frequency response estimator configured to calculate a first frequency response estimation value using a reference signal, a duration extractor configured to determine an estimation duration by extracting at least one duration from among a plurality of duration candidates into which a predetermined maximum delay time is divided, and a second frequency response estimator configured to calculate a second frequency response estimation value as a frequency response estimation value for demodulation using the first frequency response and the estimation duration. The receiver apparatus thus performs high-precision channel estimation even if a variety of PDPs occur with time. | 08-28-2014 |
20140286298 | COMMUNICATION SYSTEM, COMMUNICATION METHOD, BASE STATION APPARATUS, AND MOBILE STATION APPARATUS - A communication system, a communication method, a base station apparatus, and a mobile station apparatus capable of improving spectral efficiency even when inter-cell interference is caused between cells of a plurality of base station apparatuses are provided. | 09-25-2014 |
20140315559 | COMMUNICATION SYSTEM AND BASE STATION APPARATUS - There is provided an invention whose object is to efficiently perform exchange of control information, for example, in the case where a plurality of cells cooperate to moderate inter-cell interference, like the IA technology. | 10-23-2014 |
20150023317 | COMMUNICATION SYSTEM, COMMUNICATION METHOD, BASE STATION APPARATUS, AND TERMINAL APPARATUS - Frequency utilization efficiency is increased while inter-cell interference is controlled. | 01-22-2015 |
20150043683 | RECEIVING DEVICE, RECEIVING METHOD, AND RECEIVING PROGRAM - GI removers b | 02-12-2015 |
Patent application number | Description | Published |
20090141834 | RECEIVER AND RECEIVING METHOD FOR RF SIGNALS - An rf signal receiver of the present invention includes: a replica signal generating unit for generating on the basis of a received signal a replica of a transmission signal a delayed arriving signal removing unit for removing the delayed arriving signal from the received signal through the use of the replica signal at the timing of a predetermined timing pattern; a signal combining unit for combining the output of the delayed arriving signal removing unit, whose output represents the results of the removal of the delayed arriving signal from the received signal at the timing of a predetermined timing pattern; and a demodulation unit for demodulating the output of the signal combining unit. | 06-04-2009 |
20090264076 | TRANSMITTER FOR COMMUNICATIONS SYSTEM - An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station. | 10-22-2009 |
20090268686 | WIRELESS TRANSMITTER AND WIRELESS TRANSMISSION METHOD - A wireless transmitter of the present invention includes n (n being an integer of 2 or more) transmission antennas, a transmission circuit controller that, based on reception qualities reported from terminals, assigns a chunk to each terminal, and sends a phase-control report signal that determines whether to perform phase-control, to that chunk, and a transmission circuit unit that, to each of the n transmission antennas, performs phase-control based on the phase-control report signal, and applies a delay that obtains an optimum transmission diversity effect among a plurality of transmission diversity effects. | 10-29-2009 |
20090285322 | RADIO TRANSMITTER, RADIO COMMUNICATION SYSTEM, AND RADIO TRANSMISSION METHOD - A radio transmitter of the present invention includes a scheduler for assigning a communication time or a communication frequency to each radio receiver based on quality information of a received signal transmitted by the radio receiver, a transmission circuit controller for transmitting either a frequency diversity region or a multiuser diversity region to be selected with respect to each chunk, and a transmission circuit for applying different delay times to signals of a plurality of transmission antennas based on a transmission result of the transmission circuit controller. | 11-19-2009 |
20090318178 | TRANSMITTER FOR COMMUNICATIONS SYSTEM - An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station. | 12-24-2009 |
20100189162 | TRANSMISSION-AND-RECEPTION APPARATUS, TRANSMISSION-AND-RECEPTION SYSTEM, AND TRANSMISSION-AND-RECEPTION METHOD - A transmission-and-reception apparatus of the present invention includes: a receiver that receives category information concerning a function of another transmission-and-reception apparatus; a selector that selects an interleaving scheme based on the category information; and an interleaver that interleaves signals to be transmitted to the other transmission-and-reception apparatus based on the selected interleaving scheme. Thereby, the maximum performance of each reception apparatus can be achieved even when reception apparatuses belonging to multiple categories are included in a wireless communication system. | 07-29-2010 |
20100311358 | TRANSMITTER FOR COMMUNICATIONS SYSTEM - An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station. | 12-09-2010 |
20120216491 | METHOD AND APPARATUS FOR MANUFACTURING LIQUID CONTAINER - A compression member is used to press a first outer surface of a negative pressure generating member which contacts a surface of a partition wall and to press a second outer surface of the negative pressure generating member which contacts an inner surface of a first recessed portion located opposite the partition wall. The negative pressure generating member is placed in the first recessed portion with releasing the pressure exerted on the first outer surface while maintaining the pressure exerted on the second outer surface. After the negative pressure generating member is placed in the first recessed portion, the pressure exerted on the outer surface of the negative pressure generating member is released. | 08-30-2012 |
20120227861 | INSERT METHOD OF NEGATIVE-PRESSURE GENERATING MEMBER AND INSERT DEVICE OF NEGATIVE-PRESSURE GENERATING MEMBER - There is provided an insert method of a negative-pressure generating member where, upon inserting a negative-pressure generating member | 09-13-2012 |
20120252381 | TRANSMITTER FOR COMMUNICATIONS SYSTEM - An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station. | 10-04-2012 |
20150062259 | INK FILLING APPARATUS AND INK FILLING METHOD - When ink remains in a space that communicates with an ink storage chamber so as to be set under reduced pressure together with the ink storage chamber, the pressure in the ink storage chamber can still be efficiently reduced to a target pressure level. A liquid spray device sprays liquid toward a pipe extended between a negative-pressure generation member storage chamber and a valve in order to cool down ink that is present inside the pipe. | 03-05-2015 |