Patent application number | Description | Published |
20150039178 | RESISTANCE ESTIMATION APPARATUS, ENERGY ESTIMATION APPARATUS, SYSTEM, METHOD AND PROGRAM - According to one embodiment, a resistance estimation apparatus includes a first detection unit, a second detection unit, a third detection unit and a first calculation unit. The first detection unit detects, as an output value, an output of a driving source of a vehicle. The second detection unit detects, as a braking value, a strength of a braking force. The third detection unit detects a speed of the vehicle. The first calculation unit calculates a traveling resistance resulting from a road surface that the vehicle has traveled during a traveling period, using a vehicle characteristic, the output value, the braking value and the speed, the traveling period including a period from a first time point when the vehicle starts and the speed changes from zero to a second time point when the vehicle stops and the speed changes to zero. | 02-05-2015 |
20150160300 | CELL STATE CALCULATION APPARATUS AND CELL STATE CALCULATION METHOD - According to an embodiment, a cell state calculation apparatus includes the following elements. The database stores a function indicating a relationship between a voltage and a charged capacity of an active material. The active material amount calculation unit calculates an amount of an active material of the secondary cell by referring to the database and by using the voltage detected by the voltage detector and the current detected by the current detector while the secondary cell is charged or discharged. The open circuit voltage calculation unit calculates a function indicating a relationship between an open circuit voltage and a charged capacity of the secondary cell by referring to the database and by using the calculated amount of the active material. | 06-11-2015 |
Patent application number | Description | Published |
20100054116 | Radio Base Station and Radio Mobile Station - The base station transmits a synchronization signal that contains a pattern of repeated SYNC's generated by dividing FFT size by N wherein the pattern of repeated SYNC's is inverted in polarity for each of the SYNC's according to a code outputted from a code generating circuit. CP length is M/N of FFT size, and the number of divisions (M+N) of a symbol of the synchronization signal is brought into agreement with the code length L of Barker code. The mobile station detects the synchronization signal by using a first matched filter that has as many taps as (FFT size/N) stages, and uses a pattern of SYNC's generated by dividing FFT size by N as a tap coefficient, and a second matched filter that has as many taps as (M+N) stages and uses Barker code as a tap coefficient. | 03-04-2010 |
20100086084 | ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING DEMODULATOR - An OFDM demodulator which does not require a reference signal for synchronization of carriers and can reduce influence of phase rotation by a propagation path when carrier synchronization is made. The OFDM demodulator performs Fourier transform plural times in 2 or more different operation ranges for the same OFDM symbol, calculates phases of sub carriers from the plural-time results of the Fourier transform, compares the calculated phases for each of the plural-time results of the Fourier transform and detects an error in frequency of reproduction carrier from the compared results. | 04-08-2010 |
20100309864 | RESOURCE ASSIGNMENT METHOD AND COMMUNICATION APPARATUS FOR WIRELESS COMMUNICATION SYSTEM - Resources are assigned in units of resource blocks each composed of one or more subcarriers, inter-cell interference adjustment control information is notified to each other among base stations, a transmit power limitation on each of the resource blocks in a cell is decided based on the inter-cell interference adjustment control information; and the decision of the transmit power limitation is changed sequentially beginning at a resource block having a transmit power limitation different from the transmit power limitation on an adjacent resource block. | 12-09-2010 |
20100309866 | WIRELESS COMMUNICATION SYSTEM, BASE STATION AND MOBILE STATION - In a system of the present invention, the amount of cell-edge band is limited. In addition, the upper limit of the amount of cell-edge band in each cell is set for limiting the amount of cell-edge band based on the upper limit. The number of cell-edge MSs is also limited. In addition, the upper limit of the number of cell-edge MSs in each cell is set for limiting the number of cell-edge MSs based on the upper limit. | 12-09-2010 |
20100311430 | RADIO COMMUNICATION SYSTEM, BASE STATION AND MOBILE STATION - In a radio-communication system, when wanting to perform high-accuracy scheduling in a base station, a large number of information items, such as channel quality information, desired precoding matrix information and so on, are fed back from a mobile station with a high degree of accuracy. The base station monitors the feedback information and, upon acquisition of it, transmits to the mobile station a certain kind of feedback information which is judged to contribute to scheduling accuracy improvement while preventing the other kinds of feedback information from being sent to the mobile station. | 12-09-2010 |
20110211519 | WIRELESS COMMUNICATION SYSTEM, BASE STATION AND NETWORK CONTROL APPARATUS - In a time slot in which a first base station for performing a multicast transmission executes the multicast transmission, a second base station which does not perform the multicast transmission does not perform a unicast data transmission. The time slot in which the first base station performs the multicast transmission is notified to the second base station from a multicast control apparatus for performing scheduling of the multicast transmission to the first base station. Information to receive the multicast transmission is notified from the second base station to a terminal connected to the second base station. | 09-01-2011 |
20110211560 | MOBILITY CONTROL METHOD MITIGATING INTER CELL INTERFERENCE AND BASE STATIONS WHICH ADOPT THE METHOD - Interference applied to neighbor cells during terminal handovers can be reduced in wireless communication systems containing base stations having different cell sizes. A serving cell makes handover judgment criteria easier based on pre-acquired cell size information on its own cell and cell size information of neighbor cells in order to facilitate terminal handovers from a base station with a large cell size to a base station with a small cell size. The serving cell finds evaluation function values based on the propagation state (e.g. reference signal received power) between the terminal and target cell, and the interference and load information exchanged between the base stations, and selects the terminal for handover by comparing the evaluation function value with the handover criteria value. The system selects a target cell having a good effect in lowering interference such as a cell with large reference signal received power acquired from a terminal, to serve as the handover destination. | 09-01-2011 |
20110212744 | TRANSMIT POWER CONTROL METHOD FOR RADIO COMMUNICATION SYSTEM AND RADIO BASE STATION DEVICE - A communication device includes pilot signal sending part and transmit power control part and holds a criterion value indicating target channel quality for mobile stations within the area covered by the base station. It creates quality data from reports from one or plural mobile stations, stores the quality data, creates a first representative value indicating average channel quality for the mobile station(s) from the stored quality data, and changes the transmit power depending on the result of comparison between the first representative value and the criterion value. It creates a second representative value indicating distribution of low channel quality from the stored quality data and updates the criterion value depending on the result of comparison between the second representative value and the criterion value. | 09-01-2011 |
20110244866 | WIRELESS COMMUNICATION SYSTEM AND LOAD BALANCING AWARE HANDOVER METHOD THEREFOR - An object of the invention is to provide a wireless communication system in which the load of each cell and interference between cells are taken into account. In a handover-candidate base station and a handover-source base station, parameters for interference-reducing scheduling and handover facilitating processing are adjusted based on the mutual load information. When the handover-candidate base station, to be used for load balancing, is a large-diameter cell, transmit power control and frequency scheduling are adjusted by taking account of the load state at a cell edge. When the handover-source base station has a small-diameter cell, the number of terminals to be handed over is adjusted by taking account of the load state of the handover-candidate base station. Thus, both of interference control and load balancing are achieved. | 10-06-2011 |
20110310758 | Method of Resource Assignment for Radio Communication System and Base Station Apparatus - A method for assigning resources of a radio communication system that is aimed at relaxing interference between cells and that is applicable even in the case where femtocell base stations are installed within a macrocell base station area, and a radio base station apparatus. A transmit power limitation that limits an allocatable resource for each subband consisting of one or plural sub-carriers is decided, resource assignment is preformed on a mobile terminal on a subband-by-subband basis by a scheduler so that the transmit power limitation may be satisfied, and the transmit power limitation is altered based on an estimation result of an interference quantity from surrounding cells. | 12-22-2011 |
20120028630 | Base Station and Cellular Wireless Communication System - A femtocell base station collects the terminal distribution within the cell and selects terminals to represent the cell-center and the cell-edge from among the terminals within the cell. The femtocell base station also calculates maximum transmit power for the respective the cell-center and cell-edge terminals allowable by the macrocell base station. The femtocell base station sets the respective transmit power of the cell-center and the cell-edge in a range that will not exceed the maximum transmit power, adjusts the transmit power control parameter to allow control by the terminal at the power value that was set, and notifies the terminal. Communication with high throughput can in this way be attained for terminals in cells within the femtocell base station during uplink communications to the femtocell base station, and interference applied to the terminals in the macrocell base station can be suppressed. | 02-02-2012 |
20120176955 | RADIO SYSTEM AND RADIO COMMUNICATION METHOD - Regardless of use of small resource in donor (macro) base station, high throughput in relay femto base station is provided. The relay femto base station transfers data of a C-plane communicated between a core network and a mobile station through the donor macro base station by a radio link, and transfers data of a U-plane through an internet by a wired public line. The relay femto base station measures an interfered power from a neighboring relay femto base station, and notifies the donor macro base station of the measured interfered power, and the donor macro base station adjusts radio packet scheduling so as to prevent interference between the relay femto base stations on the basis of a notified measurement value of the interfered power. | 07-12-2012 |
Patent application number | Description | Published |
20080304388 | Optical Disc Recording Apparatus and Optical Disc Recording Method - In a recording/reproducing apparatus and a recording method, for enabling a high reliability on reproduction data are conducted the followings: recording a test mark within the test aria with a predetermined write strategy; obtaining signal amplitudes corresponding to a front portion, a middle portion, and a rear portion of the test mark, by reproducing the test mark; determining on whether the test mark has a desirable configuration or not, upon basis of at least one of ratios, defined between the amplitude of the front portion and the amplitude of the rear portion, and between the amplitude of the middle portion and the amplitude of the rear portion; correcting the write strategy if it is determined that the test mark has not the desirable configuration; and recording the information within the data area with the write strategy after the correction thereof. | 12-11-2008 |
20090028020 | Optical disk device and control method for the same - Provided is an optical disk device capable of recording and/or reproducing information on optical disks with high reliability; and a method for controlling the optical disk device. The position of an optical lens where the amplitude of a reproduction signal during the period corresponding to a minimum-length recording mark and a space having the same length reaches its maximum is detected; and the detected position is set as a reference position for the objective lens relative to the optical disk, for use in focus control. Also, the position of the objective lens where the result of multiplication of resolution and modulation becomes greatest is detected; and the detected position is set as a reference position for the objective lens relative to the optical disk, for use in focus control. | 01-29-2009 |
20100220570 | SIGNAL QUALITY EVALUATING APPARATUS AND METHOD, AND INFORMATION RECORDING MEDIUM - A signal quality evaluating method necessary for a signal quality evaluation index and a margin design is provided for an apparatus utilizing hologram recording techniques. An evaluation index is used being obtained by dividing root sum square of standard deviations of luminance value distribution of on- and off-pixels obtained from reproduced signals, by a difference between average values. | 09-02-2010 |
20110261671 | REPRODUCTION APPARATUS AND REPRODUCTION METHOD - In case of reproducing a hologram recorded on an optical information recording medium, adjusting beam with the amplitude distribution and phase distribution at least partially the same as those of a signal beam upon recording is radiated to the optical information recording medium which records information. The diffracting beam diffracted by the hologram is detected by a photodetector. Based on the detected information, an incident angle of the reference beam to the optical information recording medium is appropriately controlled. | 10-27-2011 |
20110273754 | HOLOGRAPHIC MEMORY DEVICE AND REPRODUCTION/RECORDING METHOD - An optical beam with the same amplitude distribution and phase distribution as those of the signal beam used for recording is radiated to the hologram recording medium via an optical system of the signal beam prior to reproduction so that the optical beam with the amplitude and phase of the reference beam upon recording is generated through diffraction. A wavefront sensor detects the wavefront configuration of the diffraction beam and obtains preliminarily the suitable wavefront of the reference beam for reproduction. The wavefront control element preliminarily corrects the wavefront of the reference beam to an optimum wavefront. | 11-10-2011 |
20110280112 | OPTICAL INFORMATION REPRODUCTION APPARATUS AND OPTICAL INFORMATION REPRODUCTION METHOD - In an optical information reproduction method for reproducing information using holography from a medium which records an interference pattern generated when overlapping a signal beam and a reference beam, the reference beam is radiated to the medium at a reference beam angle with a predetermined range for reproducing the information, a reproduction beam is generated by diffracting the reference beam with the interference pattern, the reproduction beam is detected by a photodetector; and the information is reproduced by processing a signal detected by the photodetector. | 11-17-2011 |
20120026856 | OPTICAL INFORMATION RECORD/REPRODUCTION APPARATUS AND REPRODUCTION APPARATUS - A holographic memory apparatus comprises first phase modulation means that adds phase information to each pixel of a signal beam to generate page data at recording time; oscillator light generation means that generates an oscillator light that is superimposed on, and interferes with, a diffracted light from a holographic recording medium at reproduction time; second phase modulation means that adds phase information to the oscillator light; and light detection means that detects an interference light generated by superimposing the oscillator light and the diffracted light from the holographic recording medium. | 02-02-2012 |
20120163152 | OPTICAL INFORMATION REPROCESSING APPARATUS AND OPTICAL INFORMATION REPRODUCING METHOD - In reproduction of a two-dimensional page data from an optical information recording medium utilizing holography, a reproduced two-dimensional page data is divided into a plurality of areas each of which has a predetermined size, the divided two-dimensional areas are individually subjected to adaptive equalizing, and then are coupled to restore the condition of the original two-dimensional page data. | 06-28-2012 |
20120188618 | OPTICAL INFORMATION REPRODUCING METHOD AND OPTICAL INFORMATION REPRODUCING APPARATUS - An optical information reproducing method and apparatus using an angle-multiplex recording type holographic memory. An optical information recording medium is exposed to a reference beam, the intensity of a diffracted beam diffracted in the medium is detected by a photodetector, an error signal is generated based on a value obtained by differentiating the detected intensity of the diffracted beam based on an angle of the reference beam, so that a reference beam angle control element is subjected to a feedback control. | 07-26-2012 |
20130128714 | OPTICAL INFORMATION RECORDING APPARATUS, OPTICAL INFORMATION REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING METHOD, OPTICAL INFORMATION REPRODUCING METHOD AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD - The above-described problem can be solved by the following optical-information reproducing apparatus: An optical-information reproducing apparatus for reproducing a hologram storage medium into which an interference pattern is recorded as a hologram, the interference pattern being formed by causing a reference beam and a signal beam to interfere with each other, the optical-information reproducing apparatus, including an optical detector for detecting a reproduced beam, the reproduced beam being acquired by illuminating the recorded hologram with the reference beam, an optical element for generating a first reference beam and a second reference beam by branching the reference beam, a wavefront detector for detecting wavefront aberration of the reference beam by causing the first reference beam and the second reference beam to interfere with each other, and a wavefront compensator for compensating the wavefront of the reference beam, wherein the wavefront compensator is adjusted based on an output of the wavefront detector. | 05-23-2013 |
20130201808 | OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS, OPTICAL INFORMATION REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING/REPRODUCING METHOD AND OPTICAL INFORMATION REPRODUCING METHOD - An optical-information reproducing apparatus for reproducing information from an optical-information storage medium where an interference pattern between a signal beam and a reference beam is recorded as page data by being angle-multiplexed, the optical-information reproducing apparatus, including a light-source for emitting a light beam, an optical element for splitting the light beam into the reference beam and the signal beam, an angle-controlling element for controlling the reference beam into a direction which is perpendicular to the angle-multiplexed direction, the reference beam being guided to enter the optical-information storage medium, an optical detector for detecting a reproduced image which is reproduced by the reference beam, and a position-controlling circuit for controlling position relationship between the reference beam and the optical-information storage medium. | 08-08-2013 |