Patent application number | Description | Published |
20090213965 | MIMO MULTIPLEXING COMMUNICATION SYSTEM AND A SIGNAL SEPARATION METHOD - A disclosed receiver in a MIMO multiplexing communication system, in which plural signals are simultaneously transmitted from plural transmitting antenna branches using the same frequency, and the transmitted signals are retrieved by receiving signals at plural receiving antennas, separating the received signals and searching for proper symbol metrics for each branch, comprises a QR decomposer for QR decomposing the received signals to orthogonalize the transmitted signals; a symbol replica candidate ranking unit for subtracting surviving symbol replica candidates from the QR decomposed received signals to get remaining received signals and rank the remaining signals in the increasing order of expected branch metrics of the remaining received signals; a symbol replica candidate selector for selecting symbol replica candidates in the ranked order; a branch metric calculator for calculating the branch metrics of the selected symbol replica candidates; and a threshold comparator for comparing the calculated branch metrics with a predetermined threshold; wherein if a calculated branch metric is larger than the predetermined threshold, the branch metric and successive branch metrics are deleted without further searching. | 08-27-2009 |
20100113059 | RADIO ACCESS NETWORK APPARATUS AND THE METHOD - A radio access network apparatus comprises a means for judging whether or not a mobile station belongs to the area of a cell end and a means for allocating the frequency of the cell end to the mobile station of the cell end and allocating the frequency of a non-cell end different from the frequency of the cell end to a user in an area other than the cell end. The frequency of the cell end includes a first band different for each cell. The frequency of the non-cell end includes a second band common to a plurality of cells including its own cell and a third band equal to the frequency of the adjacent cell end. | 05-06-2010 |
20100150274 | Method and System for Determining a Signal Vector - A method for determining a signal vector comprising a plurality of components from a received signal vector is provided comprising performing a QR decomposition of a channel matrix characterizing the communication channel via which the signal vector was received and being expanded by variance information about the noise on the communication channel carrying out a plurality of determination steps using the QR decomposition of the expanded channel matrix, wherein in each step a set of possible sub-vectors of the signal vector is determined and wherein in each step, the number of possible sub-vectors in the set is lower than a predefined maximum number, and selecting one vector of the set of possible sub-vectors determined in the last step of the plurality of determination steps as the signal vector. | 06-17-2010 |
20100254326 | BASE STATION APPARATUS, USER APPARATUS AND COMMUNICATION CONTROL METHOD - The user apparatus is provided with a plurality of antennas, and transmits a reference signal in the uplink by switching the plurality of antennas. The plurality of antennas are associated with subframes transmitted in the uplink. The base station apparatus in a radio communication system to which transmission diversity is applied in the uplink includes: a reception level storing unit configured to store a measured reception level of the reference signal for each antenna of each user apparatus; and a scheduler configured to perform, based on the reception level of the reference signal transmitted for each antenna of each user apparatus stored in the reception level storing unit, scheduling for determining a user apparatus to be assigned to a subframe associated with the antenna. | 10-07-2010 |
20110090893 | MOBILE COMMUNICATION SYSTEM, RECEIVER AND METHOD - A transmitter in a mobile communication system code-multiplexes transmission symbols together with spreading codes, performs inverse Fourier transform and transmits the result from multiple transmit antennas. A receiver in the mobile communication system performs Fourier transform on signals received at multiple receive antennas, extracts signal components of individual subcarriers and estimates symbols in accordance with a QR decomposition algorithm. A unitary matrix is derived such that a product of a spreading matrix including spreading elements as its elements and a channel matrix representing radio channel states is equal to a product of the unitary matrix and a triangular matrix. A reception vector, a unitary matrix and a triangular matrix are used to estimate symbol candidates transmitted from individual transmit antennas. | 04-21-2011 |
20110092241 | BASE STATION APPARATUS, USER EQUIPMENT TERMINAL, AND COMMUNICATION CONTROL METHOD - A base station apparatus includes a transmit diversity setting unit configured to set a transmit diversity mode to be applied to a user equipment terminal; a reception quality calculating unit configured to determine reception quality corresponding to the transmit diversity mode based on the transmit diversity mode set by the transmit diversity setting unit; a scheduling unit configured to determine a user equipment terminal to which a radio resource is to be allocated based on the reception quality determined by the reception quality calculating unit; and a notifying unit configured to notify the user equipment terminal to which the radio resource is allocated as determined by the scheduling unit of the transmit diversity mode to be applied. | 04-21-2011 |
20110256897 | BASE STATION APPARATUS, USER EQUIPMENT AND PRECODING METHOD - The present invention provides a base station apparatus capable of preventing degrading of throughput performance even when feedback information amount on precoding in uplink MIMO transmission is reduced. This base station ( | 10-20-2011 |
20110289293 | SEMICONDUCTOR DEVICE - There is provided a semiconductor device which is simple in configuration and resistant to tampering. A user input unit receives an authentication code input by a user. A CPU determines whether a user's access is legal based on the input authentication code and activates an enable signal if the user's access is legal. A normal row decoder decodes the row address specified by the CPU and selects a normal memory cell of any row based on the result of decode. A redundancy row decoder prohibits the selection by the normal row decoder when the specified row address agrees with the row address of a predetermined normal memory cell only if the enable signal is activated and selects a redundant memory cell of any row. | 11-24-2011 |
Patent application number | Description | Published |
20080274409 | Separator for Battery and Alkaline Battery - A separator for alkaline batteries which is obtained by bonding 5.0 to 45.0 g/m | 11-06-2008 |
20090017385 | ALKALINE BATTERY SEPARATOR AND ALKALINE PRIMARY BATTERY - An alkaline battery separator comprising an alkali-resistance synthetic fiber, a fibrillated organic solvent-spun cellulose fiber having a Canadian standard freeness value of 10 to 280 ml, and a mercerized pulp having a Canadian standard freeness value of not less than 550 ml is prepared. In the separator, the proportion of the alkali-resistance synthetic fiber, the proportion of the fibrillated organic solvent-spun cellulose fiber, and the proportion of the mercerized pulp relative to the total amount of the separator are respectively 25 to 62% by mass, 5 to 25% by mass, and 33 to 50% by mass, provided that the total amount of the separator is 100% by mass. The alkali-resistance synthetic fiber may comprise a polyvinyl alcohol-series fiber having an average fiber fineness of not more than 1 dtex. The alkaline battery separator may further comprise a polyvinyl alcohol-series binder in a proportion of 3 to 20% by mass relative to the total amount of the separator. The alkaline battery separator of the present invention may have a shrinkage by the area of not more than 3.5% after immersing in an aqueous solution of potassium hydroxide having a concentration of 40% by mass at 80° C. for 24 hours and a stiffness strength of not less than 2 N. | 01-15-2009 |
20100310921 | SEPARATOR FOR ALKALINE BATTERY, METHOD FOR PRODUCING THE SAME, AND BATTERY - Provided is a separator for alkaline batteries which can not only prevent batteries from internal short circuit by inhibiting the dendrite formation at anode, but also enables to have a low electrical resistance. The separator for alkaline batteries comprises a composite sheet in which a base layer comprising a wet-type nonwoven material formed from alkaline resistant fibers is covered with a nanofiber layer comprising a modified polyvinyl alcohol fiber which has a fiber diameter of 10 to 1000 nm and a liquid absorption amount by fibers of 4.0 to 40.0 g/g after immersion in a 35% aqueous solution of KOH. | 12-09-2010 |
20110309014 | FILTRATION MATERIAL FOR FILTERS, AND FILTER CARTRIDGE - The present invention relates to a filter material including a sheet-like laminate which includes an ultrafine fiber aggregate layer formed of an aggregate of ultrafine fibers produced by an electrospinning method having an average fiber diameter of not less than 10 nm and not more than 1000 nm, and a base material formed of a nonwoven fabric or a woven fabric constituted from fibers having an average fiber diameter of 1 μm or more, said filter material satisfying all of a plurality of specific requirements, having a capability of collecting or separating μm-order microfine particles with a high accuracy and exhibiting a less pressure loss and a long filtering life, as well as a filter cartridge using the filter material. | 12-22-2011 |
Patent application number | Description | Published |
20120164514 | SEPARATOR FOR NON-AQUEOUS BATTERIES, NON-AQUEOUS BATTERY USING SAME, AND PRODUCTION METHOD FOR SEPARATOR FOR NON-AQUEOUS BATTERIES - Provided is a separator for non-aqueous batteries not only having shutdown property but also achieving both higher output and short-circuit resistance. The separator comprising a laminate comprising: a low melting-point polymer fiber layer (A) having a melting point of 100 to 200° C., the low melting-point polymer fiber layer (A) comprising nanofibers having a fiber diameter of 1000 nm or smaller and formed from the low melting-point polymer; and a heat-resistant polymer fiber layer (B) positioned on the low melting-point polymer fiber layer (A) and comprising a high melting-point polymer having a melting point over 200° C. or a heat infusible polymer, the heat-resistant polymer fiber layer (B) comprising a mixture of nanofibers having a fiber diameter of 1000 nm or smaller and non-nanofibers having a fiber diameter over 1000 nm and both formed from heat-resistant polymer. | 06-28-2012 |
20130183569 | ALKALINE BATTERY SEPARATOR AND ALKALINE BATTERY USING SEPARATOR - Provided are an alkaline battery separator and an alkaline battery including the separator. The separator includes at least a coarse layer and a dense layer denser than the coarse layer. The coarse layer contains an alkaline-resistant cellulose fiber having a freeness value of 350 to 650 ml as a whole in the proportion of 25 to 65% by weight. The alkaline-resistant cellulose fiber includes at least two kinds of alkaline-resistant cellulose fibers having different freeness with each other. The difference in freeness value between the alkaline-resistant cellulose fibers having the highest and lowest freeness values is 300 to 700 ml. The dense layer contains an alkaline-resistant cellulose fiber which as a whole has a freeness value of 0 to 400 ml. The separator has a maximum pore size of 65 μm or smaller, and a liquid absorption capacity of 5 g/g or higher. | 07-18-2013 |
20130224557 | SEPARATOR FOR NON-AQUEOUS BATTERIES AND NON-AQUEOUS BATTERY EQUIPPED WITH SAME, AND PROCESS FOR MANUFACTURING SEPARATOR FOR NON-AQUEOUS BATTERIES - Provided is a separator for non-aqueous batteries, capable of being usefully used in non-aqueous batteries, and a non-aqueous battery equipped with this separator. The separator for non-aqueous batteries includes: a base layer comprising a fiber aggregate, and an electrolyte-swellable resin layer formed on at least one surface of the base layer, the resin layer comprising a urethane resin (C) obtained by reacting a polyol (A) including a vinyl polymer (a1) and a polyether polyol (a2) with a polyisocyanate (B). The vinyl polymer (a1) has as a main chain a vinyl polymer (a1′) having two hydroxyl groups at one of the termini of the main chain, and a polyoxyethylene chain having a number average molecular weight of 200 to 800 as a side chain, the percentage of the polyoxyethylene chain based on the vinyl polymer (a1) being within the range of 70 mass % to 98 mass %. | 08-29-2013 |
20150079479 | SEPARATOR FOR NONAQUEOUS CELL AND NONAQUEOUS CELL - Provided are a separator for a nonaqueous cell that has air permeability and is small in thickness while maintaining strength properties; and a nonaqueous cell having this separator. The separator includes a fiber sheet in which a polyvinyl alcohol fiber is incorporated in a proportion of 30% or more by mass (based on the fiber sheet). The fiber has a fiber breaking temperature in heated water of lower than 100° C. and higher than 85° C. | 03-19-2015 |