Patent application number | Description | Published |
20090092198 | Communication apparatus and radio communication system - A communication apparatus includes a grouping controlling unit hierarchically groups frequency channels so that the number of channels included in a group of a layer becomes smaller than the number of channels included in a group of a layer immediately above; and a propagation path information estimating unit that estimates propagation path information of the channels. The apparatus also includes an average value calculating unit that calculates an average value of the propagation path information for each group in a highest layer with the estimate values, and calculates the estimate values used in each layer based on an average value of a layer immediately above to calculate an average value of the propagation path information for each group in other layers with the estimate values of the each layer; and a feedback unit that feeds back an average value acquired in each group as feedback information. | 04-09-2009 |
20100014604 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, COMMUNICATION APPARATUS, AND COMMUNICATION SYSTEM - A transmission apparatus divides transmission data according to spatial streams and transmits divided transmission data in parallel in an MIMO communication system. A control unit selects a modulation scheme for each of the spatial streams and determines a data allocation method for each of the spatial streams based on a selected modulation scheme. An allocating unit allocates the transmission data to each of the spatial streams based on the data allocation method determined by the control unit. A modulating unit modulates allocation data for each of the spatial streams by using the selected modulation scheme for each of the spatial streams. | 01-21-2010 |
20150180568 | RELAY DEVICE, SATELLITE RELAY DEVICE, AND SATELLITE RELAY METHOD - A relay device includes first demultiplexing units that demultiplex reception signals into demultiplexed signals in a narrower band, first and second multiplexing units that multiplex input signals to generate multiplexed signals, transmission antennas that transmit the multiplexed signals generated by the multiplexing units, a regenerative relay unit that modulates an information sequence obtained by carrying out demodulation processing to the multiplexed signal generated by the second multiplexing unit to generate a modulated signal, a second demultiplexing unit that demultiplexes the modulated signal into a demultiplexed signal in a band narrower than the band of the reception signal, and a switch unit that inputs the demultiplexed signals demultiplexed by the first demultiplexing units to the multiplexing units and inputs the demultiplexed signal demultiplexed by the second demultiplexing unit to the first multiplexing units. | 06-25-2015 |
Patent application number | Description | Published |
20090128411 | RADIO WAVE ARRIVAL STATE ESTIMATION SYSTEM, RADIO WAVE ARRIVAL STATE ESTIMATION METHOD, AND PROGRAM - It is possible to accurately estimate propagation considering diffraction without significantly increasing the operation processing amount. A radio wave propagation characteristic estimation system in a radio communication system includes: non-diffracted wave estimation means for estimating propagation characteristic of a radio wave reaching from a predetermined transmission point in a limited evaluation area to a plurality of reception points in the evaluation area and estimating a component other than diffracted wave among the radio wave component reaching from the transmission point to the reception points; diffracted wave estimation means for estimating only a diffracted wave component among the radio components reaching from the transmission point to the respective reception points; and total radio wave component calculation means for calculating total radio wave propagation characteristic in the respective reception points considering the estimated result in the non-diffracted wave estimation means and the estimation result of the diffracted wave estimation means. | 05-21-2009 |
20100081390 | RADIO WAVE PROPAGATION CHARACTERISTIC ESTIMATING SYSTEM, ITS METHOD , AND PROGRAM - The amount of operation processing is reduced without largely degrading an estimation precision of radio wave propagation estimation. | 04-01-2010 |
20110003596 | BASE STATION CONFIGURATION DESIGN SUPPORT SYSTEM, AND BASE STATION CONFIGURATION DESIGN SUPPORT METHOD AND PROGRAM - A base station configuration design support system for a mobile communication system includes an estimation unit that estimates a radio wave propagation characteristic with respect to a large number of station position candidate points, with a spot at which there is a need to improve radio wave quality (countermeasure target spot) as a transmitting point, and an extraction unit extracts an improvable station position candidate point where radio wave quality at the countermeasure target spot can be improved, from among a plurality of station position candidate points, in response to an estimation result obtained by the estimation unit. | 01-06-2011 |
20120027068 | RADIO WAVE PROPAGATION CHARACTERISTIC ESTIMATION APPARATUS, METHOD, AND COMPUTER PROGRAM - To estimate radio wave propagation characteristics with high estimation accuracy, even when used for a variety of purposes. An estimation technique determining unit determines, for each of groups classified in accordance with a measurement condition, an optimum radio wave propagation characteristic estimation technique from among a plurality of radio wave propagation characteristic estimation techniques, based on an actual measured value of radio waves. A radio wave propagation characteristic estimating unit discriminates a group corresponding to the given measurement condition, sets the optimum radio wave propagation characteristic estimation technique corresponding to the discriminated group, and estimates the radio wave propagation characteristics in accordance with the set radio wave propagation characteristic estimation technique. | 02-02-2012 |
Patent application number | Description | Published |
20100104777 | OPTICAL FILM - It is an object of the present invention to provide an optical film which has reverse chromatic dispersibility that its retardation becomes smaller as the wavelength becomes shorter and a low photoelastic constant. | 04-29-2010 |
20110288261 | OPTICAL FILM - The object of this invention is to provide an optical film formed of a copolycarbonate having a desired chromatic dispersion and low photoelasticity and having excellent melt processability. | 11-24-2011 |
20120120356 | OPTICAL FILM - An optical film having a desired wavelength dispersion characteristic, a low photoelastic coefficient and a desired Nz coefficient. | 05-17-2012 |
20120123083 | POLYESTER CARBONATE COPOLYMER FOR OPTICAL LENS AND OPTICAL LENS - This invention is to provide a polyester carbonate copolymer suitable for an optical lens that has high refractivity and transparency and low birefringence and little optical strain, and optical lenses formed therefrom. | 05-17-2012 |
20130005939 | OPTICAL FILM - An optical film comprising a copolycarbonate composed of 25 to 90 mol % of unit (A) of the following formula, | 01-03-2013 |
20130253162 | POLYCARBONATE RESIN AND MOLDED ARTICLE THEREOF - A resin which has high heat resistance, high surface hardness and excellent moldability and is obtained from a biomass resource and a molded article thereof. | 09-26-2013 |
20140128567 | COPOLYCARBONATE AND TRANSPARENT MOLDED ARTICLE OBTAINED THEREFROM - A copolycarbonate which is derived from a renewable resource and excellent in heat resistance, flowability and transparency and prevented from undergoing a dimensional change by water absorption and coloring during molding as well as a transparent molded article obtained therefrom. | 05-08-2014 |
20140350208 | POLYCARBONATE RESIN - A polycarbonate resin which is excellent in heat resistance, boiling water resistance and surface hardness and has a low water absorption coefficient. | 11-27-2014 |
20150087804 | COPOLYCARBONATE - A copolycarbonate having a low water absorption coefficient and excellent heat resistance, low temperature characteristics and surface hardness. | 03-26-2015 |
20150197608 | OPTICAL FILM - An optical film having a desired wavelength dispersion characteristic, a low photoelastic coefficient and a desired Nz coefficient. | 07-16-2015 |