Patent application number | Description | Published |
20080267133 | MIMO WIRELESS COMMUNICATION SYSTEM, MIMO WIRELESS COMMUNICATION APPARATUSES, AND WIRELESS COMMUNICATION METHOD - When a plurality of user stations (STAs) simultaneously communicate with an access point (AP) through an SDMA (Space Division Multiple Access) channel in a MIMO wireless communication system, these STAs control their respective transmission signals such that each signal is received by only a different one of the plurality of antennas at the AP. (It should be noted that the number of these STAs is equal to or smaller than the number of antennas at the AP.) This eliminates the need for the AP to perform MIMO processing, thereby allowing the AP to properly receive and demodulate the signals even if they differ in carrier frequency and transmission timing, which would otherwise result in communication degradation or failure. | 10-30-2008 |
20090060070 | Apparatus and Method for Peak Suppression in Wireless Communication Systems - A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation. | 03-05-2009 |
20100278279 | Mimo wireless data transmission system - A MIMO wireless data transmission system including a data arrangement in which data to be sent is divided for each transmission stream of MIMO with adding an error detection code thereto and thereby resending a subframe's worth of data when an error occurred at the time of resending. It therefore becomes to avoid the same frame being sent again at the time of resending. | 11-04-2010 |
20110243203 | Wireless Communication System and Wireless Communication Method - In a wireless communication system in which a sending side derives transmit weight vectors based on feedback information and carries out precoding, performance degradation is caused when the channel at the time when the transmit weight vectors are derived and the true channel are different from each other. Along with variations in the channel, the power allocation to a plurality of effective streams formed in MIMO is caused to approach asymptotically to uniform power allocation from the value determined based on the channel state information that the sending side has. | 10-06-2011 |
20120149307 | Wireless Power Transmission System, Transmitter, and Receiver - A wireless power transmission system includes a receiver and a transmitter. The transmitter includes: a power transmission unit that transmits power; a power adjustment unit that adjusts power to be transmitted; and a communication unit. The receiver includes: a power receiving unit that receives power; a power detection unit that detects the received power; a power storage unit that stores the received power; and a communication unit. The power to be transmitted is adjusted on the basis of power transmission efficiency and the remaining energy storage level. The power transmission efficiency is the ratio between the transmitted power and the received power. | 06-14-2012 |
20130147573 | Electromagnetic Wave Transmission Medium and Electromagnetic Wave Transmission System - The disclosed electromagnetic wave transmission medium prevents electromagnetic leakage during high-power electromagnetic wave transmission. The sheet-form electromagnetic wave transmission medium is configured from a first mesh conductor used in transmission of electromagnetic waves having a first power; and a second mesh conductor used in transmission of electromagnetic waves having a second power. By using two mesh conductors, when said sheet-form electromagnetic wave transmission medium is used, the conduction density of the surface region where electromagnetic waves are extracted to be used for power supply assumes a coarser state than that of the other surface region. | 06-13-2013 |
20130236189 | COMMUNICATIONS SYSTEM - In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying of an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented. | 09-12-2013 |
Patent application number | Description | Published |
20130033080 | VEHICLE SEAT - A vehicle seat includes a seat cushion, a seatback, an upholstery member that covers a surface of the seatback, and a striker. The striker is fitted to a frame body that forms the seatback, and is engaged with a lock mechanism arranged outside the seatback. The striker has an engagement portion that is locked by the lock mechanism, and a threaded shaft portion that has an external thread that is screwed to the frame body. The threaded shaft portion of the striker is fastened to the frame body through a through-hole formed in the upholstery member, with the frame body covered with the upholstery member of the seatback. | 02-07-2013 |
20130033083 | VEHICLE SEAT FRAME STRUCTURE - A vehicle seat frame structure includes a frame main body formed in a frame-shape, and a wire that extends between two frame peripheral portions that make up the frame main body, end portions of the wire being integrally joined to the two frame peripheral portions. At each of the end portions of the wire, a portion that jut outs beyond the corresponding frame peripheral portion is formed as a curved portion that is curved in a direction wrapping around an outer peripheral surface of the frame peripheral portion. At least one of the curved portions of the wire has a curvature that is more gradual than a curvature of the outer peripheral surface of the frame peripheral portion to which the curved portion is joined. | 02-07-2013 |
20130033084 | VEHICLE SEAT - An engaging member is arranged at a first portion of part of an upholstery member, the first portion facing a first section, and the engaging member is fixed to an engaged member in a second groove. A second portion of the part of the upholstery member, the portion facing the second section, is arranged in the second section. One end-side portion of the engaging member is extended into the second section. In the direction in which the second groove extends, the length of an extended portion that is formed at the one end-side portion of the engaging member and that is extended into the second section is shorter than the length of a portion of the second section excluding the other portion corresponding to the extended portion. | 02-07-2013 |