Patent application number | Description | Published |
20080232506 | Reception Device, Transmission Device, and Radio System - A transmitter using a plurality of pulse signals having different pulse sequence times, a receiver for steadily demodulating pulse signals of only desirable wave, and a wireless system are disclosed. In the transmitter, a control signal generating circuit outputs a control signal for generating a plurality of pulse signals having different pulse sequence generating times, a pulse generating circuit generates a plurality of pulse signals by using the control signal. In the receiver, reception front end receives the plurality of pulse signals having different pulse sequence generating times, delay circuit delays at least one of reception front-end output signals supplied from the reception front-end by a given time, delay pulse composition circuit combines delay signal with reception front-end output signal so that the receiver steadily demodulates the pulse signals of only the desirable wave. | 09-25-2008 |
20080267324 | Impulse Radio Communication Device - An impulse radio communication device includes a wave detector for generating a detected signal, a switching section for selecting either a received signal or the detected signal in accordance with an external control signal and outputting it as a demodulation target signal, a reference waveform generating section synchronized with the demodulation target signal and generating a reference waveform signal having a different waveform in accordance with the external control signal, a demodulator for generating a demodulated signal from the demodulation target signal in accordance with the reference waveform signal, and a decoding section for decoding received data from the demodulated signal. This impulse radio communication device switches the demodulation target signal and the reference waveform signal simultaneously in accordance with a receiving and synchronizing state. This makes it difficult that synchronization is pulled in a correlation position having low electric power, and can reduce a acquisition time. | 10-30-2008 |
20080292037 | Master Side Communication Apparatus and Slave Side Communication Apparatus - A master side communication apparatus and a slave side communication apparatus wherein the structure of a receiving part of the slave side communication apparatus is simplified to achieve a reduced size, a reduced power consumption and a reduced cost. The master side communication apparatus performs a communication in synchronism with the slave side communication apparatus having no synchronization timing adjusting function. A transport signal generating timing adjusting part of the master side communication apparatus acquires, from the slave side communication apparatus, synchronization signal generation timing information used when the slave side communication apparatus receives the transport signal from the master side communication apparatus. The transport signal generating timing adjusting part varies and adjusts, based on the acquired information, the transmission timing of the signal to be transmitted to the slave side communication apparatus. A transmitting part transmits the transport signal at the adjust transmission timing. The occurrence timing of the transport signal is varied and adjusted until the slave side communication apparatus becomes able to receive the transport signal from the master side communication apparatus. | 11-27-2008 |
20090041169 | PULSE MODULATION TYPE TRANSMITTER APPARATUS AND PULSE MODULATION TYPE RECEIVER APPARATUS - A pulse modulation type transmitter apparatus and a pulse modulation type receiver apparatus wherein both a fast synchronization establishment and a low power consumption of a synchronizing part can be achieved at the same time and wherein the data transmission/reception can be performed soon after a commencement of communication, and further a fast data transmission and a low power consumption can be achieved. A first template signal ( | 02-12-2009 |
20090074117 | Pulse Radio Receiver - A pulse radio receiver not needing re-setting of the threshold for reception synchronization, judging the direction and amount of adjustment of the synchronization even if the signal strength varies, and having a shortened pull-in time of the synchronization position. The receiver comprises a detect ( | 03-19-2009 |
20090116572 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A communication apparatus in which only a terminal having a specific positional relationship can perform communication through a relatively simple arrangement. When initial setting is performed or communication is started, a timing calculating section ( | 05-07-2009 |
20090135974 | IMPULSE WAVEFORM GENERATING APPARATUS AND RADIO-FREQUENCY PULSE WAVEFORM GENERATING APPARATUS - An impulse waveform generating apparatus includes a multistage delay pulse signal generating part for generating a plurality of delay pulse signals by a timing signal; a signal source signal generating part for generating a signal source signal indicating the frequency component of an impulse waveform signal by the delay pulse signals; an envelope formation signal generating part for generating an envelope formation signal indicating the amplitude component of the impulse waveform signal by the delay pulse signals; and a mixer part for multiplying the signal source signal by the envelope formation signal to generate a prescribed impulse waveform signal. The impulse waveform generating apparatus generates the impulse waveform signal from the timing signal. Therefore, the circuit arrangement requires no digital-to-analog converter, the operational frequency of each element can be reduced, and the power consumption can be reduced. | 05-28-2009 |
20090177954 | CODE ERROR DETECTING DEVICE, WIRELESS SYSTEM AND CODE ERROR DETECTING METHOD - A code error detecting device that can more precisely detect a code error due to a delayed wave is disclosed. The code error detecting device includes a receiving antenna ( | 07-09-2009 |
20090232197 | PULSE MODULATED WIRELESS COMMUNICATION DEVICE - The transmission device includes a first transmission RF part for RF modulating the pulse signal generated at the timing of a clock signal so as to generate a clock RF signal and for outputting the clock RF signal to a synchronization signal channel; a transmission data generator for generating transmission data in synchronization with the timing of the clock signal; a PPM modulator for PPM modulating the transmission data and for outputting a PPM modulation signal; and a second transmission RF part for RF modulating the PPM modulation signal so as to generate a data RF signal and for outputting the data RF signal to a data signal channel different from the synchronization signal channel. The reception device receives reference synchronization information so as to maintain phase synchronization in data reception. | 09-17-2009 |
20090262710 | RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION DEVICE - Provided is a radio communication method capable of optimally using the wide-band communication enabled time while maintaining power saving in an ad hoc network. According to this method, in the ad hoc network using the wide-band communication and a narrow-band communication, transmission and output of the narrow-band synchronization tone signal and the resynchronization tone signal are controlled so that the reach radius of the narrow-band synchronization signal and the resynchronization tone signal exceeds the reach radius of the wide-band signal (milli-wave UWE signal). Thus, when radio communication devices pass by each other, super frame synchronization is completed before reaching the wide-band communication enabled range of the ad hoc network, thereby optimally using the wide-band communication-enabled time. | 10-22-2009 |
20100002676 | RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION DEVICE - Provided is a radio communication method capable of easily realizing multi-access in an ad-hoc network using a directive radio wave. In the ad-hoc network using the directive radio wave of the method, two PNC (A | 01-07-2010 |
20100040168 | TRANSMITTING APPARATUS, RECEIVING APPARATUS AND COMMUNICATION SYSTEM - A transmitting apparatus, receiving apparatus and communication system are disclosed, and great improvement in an S/N ratio, preventing an actual throughput from decreasing, and preventing the number of circuits for synchronizing spread spectrum signals from increasing can be expected at the receiving apparatus side. The transmitting apparatus includes a pulse generating circuit, pulse repetition cycle determining circuit, peak power determining circuit, and modulator. The pulse generating circuit generates pulse strings, pulse repetition cycle determining circuit determines, based on a clock signal, a pulse repetition cycle of the pulse string generated by the pulse generating circuit. The peak power determining circuit determines a pulse peak power of the pulse string. The modulator modulates the pulse string with transmission data, and then generates a transmission signal. | 02-18-2010 |
20100070828 | TRANSMISSION METHOD, TRANSMITTER APPARATUS AND RECEPTION METHOD - A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts ( | 03-18-2010 |
20100083314 | INFORMATION PROCESSING APPARATUS, INFORMATION ACQUISITION METHOD, RECORDING MEDIUM RECORDING INFORMATION ACQUISITION PROGRAM, AND INFORMATION RETRIEVAL SYSTEM - An information processing apparatus includes: a content-information acquisition section obtaining content information including character information on a content; a keyword acquisition section transmitting the content information obtained by the content-information acquisition section to a keyword extraction server extracting a keyword from the content information and obtaining the keyword extracted from the content information; a retrieval-information acquisition section transmitting the keyword obtained by the keyword acquisition section to a retrieval server retrieving information on the Internet by the keyword and obtaining the information retrieved by the keyword from the retrieval server; and a display control section displaying the information obtained by the retrieval-information acquisition section to a display section. | 04-01-2010 |
20100166037 | UWB TRANSMISSION APPARATUS AND UWB TRANSMISSION METHOD - A UWB transmission apparatus that, in a system using a mixture of amplitude and phase modulation schemes, can support both of the amplitude and phase modulation schemes, while preventing the signal powers of amplitude-modulated signals from degrading. In this UWB transmission apparatus, if the modulation mode is of QPSK, a mapping part ( | 07-01-2010 |
20110041717 | PLATE SUPPLY AND DISCHARGE DEVICE AND PRINTING PLATE FORMING DEVICE USING SAME - To provide a plate supply and discharge device and a printing plate forming device which are capable of transferring plates and printing plates of various sizes and preventing the plates and printing plates from being damaged in the plate supply and discharge device (printing plate forming device). A plate supply and discharge unit ( | 02-24-2011 |
20120281740 | TRANSMITTING APPARATUS, RECEIVING APPARATUS AND COMMUNICATION SYSTEM - A transmitting apparatus, receiving apparatus and communication system are disclosed, and great improvement in an S/N ratio, preventing an actual throughput from decreasing, and preventing the number of circuits for synchronizing spread spectrum signals from increasing can be expected at the receiving apparatus side. The transmitting apparatus includes a pulse generating circuit, pulse repetition cycle determining circuit, peak power determining circuit, and modulator. The pulse generating circuit generates pulse strings, pulse repetition cycle determining circuit determines, based on a clock signal, a pulse repetition cycle of the pulse string generated by the pulse generating circuit. The peak power determining circuit determines a pulse peak power of the pulse string. The modulator modulates the pulse string with transmission data, and then generates a transmission signal. | 11-08-2012 |
20130159816 | TRANSMITTING METHOD, RECEIVING METHOD, RECEIVING APPARATUS AND TRANSMITTING APPARATUS - A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts ( | 06-20-2013 |
20130189929 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A wireless communication device transmits and receives a signal by a wireless communication using a millimeter wave frequency band. The wireless communication device includes an antenna section having directivities in a plurality of different directions, an antenna control section adapted to form a directivity in a prescribed direction among the plurality of directivities of the antenna section, a direction and position estimation section adapted to estimate direction and position information of a wireless communication device to be communicated with, which is a target for the wireless communication, in accordance with a receiving signal received by the antenna section having the directivity formed, and a display section adapted to display the estimated direction and position information of the wireless communication device to be communicated with. | 07-25-2013 |