| 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 |
| 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 |
