Tomoya Urushihara
Tomoya Urushihara, Chiba JP
Patent application number | Description | Published |
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20090104880 | WIRELESS COMMUNICATION APPARATUS AND COMMUNICATION CONTROL METHOD - A wireless communication apparatus and a communication control method wherein even if there occurs a change in communication control information due to a function change, an appropriate correction is implemented to improve the communication quality. A wireless communication apparatus ( | 04-23-2009 |
20090135760 | MULTIMODE WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A multimode wireless communication apparatus that supports plural wireless communication systems and switches wireless communication systems to communicate. The apparatus includes a signal processor capable of switching wireless communication systems by plural manners; and a controller that directs to the signal processor a combination of manners of switching wireless communication systems according to a communication environment. The signal processor switches wireless communication systems according to the combination of manners of switching wireless communication systems directed from the controller. | 05-28-2009 |
20090187615 | DIGITAL FILTER - Provided is a digital filter for radio communication processing capable of dynamically modifying the characteristic and simultaneously processing a plurality of systems. In the digital filter, calculation core groups ( | 07-23-2009 |
20090285329 | TRANSMISSION POWER CONTROL METHOD AND TRANSMISSION APPARATUS - Even when there is limit placed upon transmission power control time, the transmission power control method enables accurate control transmission power. The transmission power control method includes: a first measuring step of measuring, in a symbol interval before a symbol interval where mode of the power amplifier changes, output power of the power amplifier before mode changes; a first setting step of setting target power of the power amplifier after mode changes based on a measurement result obtained in the first measuring step and a transmission power control signal; a second measuring step of measuring, in the symbol interval where mode of the power amplifier changes, output power of the power amplifier after mode changes, the output power being controlled using the target power set in the first setting step; and a second step of setting corrected target power based on a measurement result obtained in the second measuring step. | 11-19-2009 |
20100029225 | POLAR MODULATION TRANSMISSION APPARATUS - By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus | 02-04-2010 |
20100222015 | POLAR MODULATION TRANSMITTER, ADAPTIVE DISTORTION COMPENSATION PROCESSING SYSTEM, POLAR MODULATION TRANSMISSION METHOD, AND ADAPTIVE DISTORTION COMPENSATION PROCESSING METHOD - An object of the invention is to provide a polar modulation transmitter that can perform adaptive distortion compensation processing without the need for a synchronization adjustment circuit for synchronizing an input baseband signal and an output signal of a power amplifier. An adaptive operation control section | 09-02-2010 |
20100291885 | MULTIMODE-COMPAIBLE POLAR MODULATION TRANSMISSION DEVICE AND MULTIMODE RADIO COMMUNICATION METHOD - An object of the invention is to provide a multimode polar modulation device and a multimode radio communication method for making it possible to decrease the distortion compensation processing data capacity while maintaining the distortion compensation accuracy and also making it possible to efficiently store the distortion compensation processing data corresponding to a multimode modulation signal adaptively acquired in memory. | 11-18-2010 |
Tomoya Urushihara, Kanagawa JP
Patent application number | Description | Published |
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20100029224 | POLAR MODULATION TRANSMISSION APPARATUS - By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus | 02-04-2010 |
20110291755 | TRANSMISSION POWER CONTROL METHOD AND TRANSMISSION POWER CONTROL APPARATUS - When switching the mode of a power amplifier between compressed mode and uncompressed mode, accurate transmission power control is realized. A transmission power control method includes setting a power setting value of mode to switch to, such that an inter-mode output power error is canceled (equal to step ST | 12-01-2011 |
20120001687 | RECEIVING APPARATUS AND AUTO GAIN CONTROL METHOD - A receiving apparatus converges a gain to a target gain even when a fish bone effect signal is included having a low power period in which signal power decreases abruptly compared to average signal power. The receiving apparatus ( | 01-05-2012 |
20120001688 | TRANSMISSION POWER CONTROL METHOD AND TRANSMISSION POWER CONTROL APPARATUS - When switching the mode of a power amplifier between a compressed mode and an uncompressed mode, an accurate transmission power control is realized. A transmission power control method includes calculating an intra-mode output power error from a power setting value in a mode before switching as a comparison standard value error (equal to step ST | 01-05-2012 |
20130058435 | HIGH EFFICIENCY TRANSMITTER - A transmitter includes: a decoder for transforming an IQ signal into a linear sum of two vectors which have non-negative coefficients, respectively, which form an angle of (π/4), and which are included in eight vectors representing directions indicated by eight angles of (−π/2), 0, (π/2), π, (−3π/4), (−π/4), (π/4), and (3π/4), respectively, and for outputting information upon magnitudes and angles of the two vectors; a phase generator for generating eight phase signals corresponding to phases of (−π/2), 0, (π/2), π, (−3π/4), (−π/4), (π/4), and (3π/4), respectively, and outputting the eight phase signals; and a selector for selecting two phase signals having phases equivalent to angles of the two vectors, from among the eight phase signals, and amplifying the two phase signals having been selected, based on the information upon the magnitudes and the angles, and outputting, as a plurality of amplification signals, the two phase signals having been amplified. | 03-07-2013 |
Tomoya Urushihara, Tokyo JP
Patent application number | Description | Published |
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20090054002 | Radio terminal device, management terminal device, and radio communication method - Management terminal apparatus, wireless terminal apparatus, and a wireless communication method that reduces interference and improves communication quality under a communication environment where a plurality of wireless communication schemes are mixed. At management terminal apparatus ( | 02-26-2009 |