Patent application number | Description | Published |
20080212659 | Communication Device and Communication Method - Based on interference electric power attributed to a delayed wave, interference electric power attributed to a signal from another non-targeted terminal or a base station, and noise electric power, in order to obtain an index for further exactly representing the signal quality, the combination of a desired-signal/undesired-signal ratio | 09-04-2008 |
20090003154 | INFORMATION RECORDING/REPRODUCING APPARATUS - In a recording apparatus for a file system conforming to UDF 2.6, performance is improved when a MetaData file (MD) representing management information and its MetaDataMirror file (MDM) are recorded. The MDM file is not recorded before finalization is executed and when finalizing, a copy of the latest MD file is recorded as the MDM file. | 01-01-2009 |
20090040890 | Information recording/reproduction apparatus, information recording method and information recording medium - Provided is a recording/reproduction apparatus capable of securing a backup area for management information on a recording medium without affecting the capacity of a user data area. Before a hard disk drive or a disc medium (recording medium) is finalized, metadata is recorded in a metadata area and when the hard disk drive or the disc medium are finalized, a user data area portion corresponding to the volume of metadata required for the finalizing is set as a metadata mirror area and then the metadata recorded in the metadata area is copied to the metadata mirror area. | 02-12-2009 |
20090129329 | SCHEDULING METHOD AND COMMUNICATION APPARATUS - The present invention provides a scheduling method in which a communication apparatus belonging to an OFDMA-based wireless communication system communicates data with a plurality of users by preferentially allocating a data sequence to a default subchannel segment that is different from other-cell allocation subchannel segment that is preferentially used for data communication by adjacent communication terminal. The scheduling method includes a data sequence selection-allocation step including selecting as many data sequences as can be allocated to the default subchannel segment and allocating (scheduling) selected data sequences to the default subchannel segment, wherein in downlink scheduling, the data sequence selection-allocation step including selecting the data sequences in order from a data sequence subjected to a maximum level of interference from an adjacent other base station (adjacent base station), and in uplink scheduling, the data sequence selection-allocation step including selecting the data sequences in order from a data sequence that causes a maximum level of interference to the adjacent base station because of data communication; and a remaining data sequence allocation step including allocating a data sequence that has not allocated to the default subchannel segment to the other-cell allocation subchannel segment when allocation of all the data sequences to the default subchannel segment fails. | 05-21-2009 |
20100086069 | COMMUNICATION DEVICE AND COMMUNICATION SYSTEM - A communication device performing communications by an OFDMA system. The communication device includes a zone-boosting-amount calculating unit that obtains a segment number calculated in a synchronization process, obtains a sub-channel corresponding to the segment number by referring to a predetermined relationship between sub-channels and segment numbers, and calculates an amount of zone boosting based on an average power of a preamble and an average power of pilot sub-carriers included in the sub-channel. A demodulating unit estimates a transmission path after correcting a power value of a received signal based on calculated amount of zone boosting, and performs demodulation. | 04-08-2010 |
20100135424 | COMMUNICATION APPARATUS - A communication apparatus includes: a plurality of antennas; a pre-processing unit that, according to an instruction from a higher-level layer, performs processing on each zone generated by time-division of a transmission frame and generates a transmitting signal; and post-processing units that transmit the transmitting signal generated corresponding to each zone via one or more of the antennas. Each post-processing unit includes transmission of a preamble via each of the antennas. Thus, each post-processing unit transmits the preamble in a format that enables a receiving side to correctly determine AGC power control amount. | 06-03-2010 |
20120127947 | ON-BOARD WIRELESS COMMUNICATION APPARATUS AND ON-BOARD WIRELESS COMMUNICATION SYSTEM - An on-board wireless communication apparatus using an OFDMA scheme includes: a position information acquisition unit which estimates a position after a predetermined time period based on base station position information, mobile station position information, and speed information of mobile station as estimated mobile station position information; a transmission path information storage unit which determines a transmission rate to be applied based on the estimated position information and a distribution of the transmission rate determined by a distance from the base station; a reception buffer unit which stores received data; a reception buffer amount adjustment unit which determines a data amount to be received based on a data storage amount from the buffer unit and a type of the data therein; and a band allocation unit which determines a band requested to the base station by the transmission rate from the storage unit and the data amount from the adjustment unit. | 05-24-2012 |
20150195500 | In-Vehicle Imaging Device - An in-vehicle imaging device is provided with a detection region setting unit for setting a detection region, which corresponds to a predetermined object to be detected within an imaging screen; a color signal determination unit for setting a specific color corresponding to the object to be detected, and for determining whether the color data of pixels contained in the detection region are close to the specific color; and a gain control unit for averaging the color data of pixels (approximate color pixels) that were determined to be close to the specific color within the detection region and for adjusting the color gain of the image signal on the basis of a differential value of the color data of the specific color and the average value of the color data of the approximate color pixels. | 07-09-2015 |