| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | SELF-CALBRATING RFID TRANSPONDER | US12261573 | 2008-10-30 | US20090174529A1 | 2009-07-09 | Bernd Hertwig |
| A RFID transponder includes a resonant circuit for providing a clock signal at a predetermined clock frequency, a self-calibration stage for calibrating the resonant circuit's current clock frequency towards the predetermined clock frequency. The self-calibration stage is adapted to compare a first clock frequency of the resonant circuit determined during an interrogation period, during which the resonant circuit is excited by an external RF signal, with a second clock frequency determined during a frequency maintenance period, during which the resonant circuit is excited internally through an oscillation maintenance circuit of the RFID transponder and to calibrate the resonant circuit towards the predetermined clock frequency based on the comparison result. | ||||||
| 42 | Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems | US12149108 | 2008-04-25 | US20090041150A1 | 2009-02-12 | Jiann-An Tsai; Cornelius Van Rensburg; Jianzhong Zhang |
| A method includes broadcasting, at a transmitter, messages comprising antenna configuration, antenna spacing and a number of antenna of the transmitter and reference signals; generating, at a receiver, a codebook comprising a plurality of antenna beams based on the broadcasted messages; receiving, at the receiver, the broadcasted reference signals; selecting, at the receiver, an antenna beam among the plurality of antenna beams within the codebook in dependence upon a predetermined performance criteria of a data communication system and in dependence upon the broadcasted reference signals; feedbacking to the transmitter, at the receiver, information comprising the antenna beam selected by the receiver; optimizing, at the transmitter, a beamforming process by utilizing the feedback information from the receiver; transmitting, at the transmitter, data signals by utilizing the optimized beamforming process; and receiving and processing, at the receiver, the data signals in dependence upon the selected antenna beams within the codebook. | ||||||
| 43 | Rf ID Tag Device | US10590882 | 2005-02-21 | US20090033462A1 | 2009-02-05 | Hitoshi Kitayoshi; Kunio Sawaya |
| The present invention aims to overcome the drawback with conventional RFID tag devices having a short communication range, and expand the communication range to several times or more that in the conventional scheme. The conventional scheme is based on equilibrium feeding/equilibrium modulation (a two-terminal circuit for antenna operation), whereas the present invention is based on disequilibrium feeding/equilibrium modulation (a three-terminal circuit for antenna operation). The conventional scheme is based on simple rectification of received RF signals, whereas the present invention employs a circuit based on a combination of a stub resonance-based, impedance transformation boosting scheme and a ladder boosting scheme. The conventional scheme is based on ASK or BPSK modulation, whereas the present invention is based on passive modulation, but can employ a QPSK modulation circuit. | ||||||
| 44 | METHODS AND APPARATUS FOR WIRELESSLY COMMUNICATING SIGNALS THAT INCLUDE EMBEDDED SYNCHRONIZATION/PILOT SEQUENCES | US12038983 | 2008-02-28 | US20090011722A1 | 2009-01-08 | John Eric KLEIDER; Robert John BAXLEY |
| An embodiment for wirelessly communicating a signal includes a transmitter combining a plurality of phase shifted input data signals with a plurality of synchronization/pilot sequences to produce a plurality of combined signals, performing frequency domain-to-time domain transformations of the combined signals to produce a plurality of candidate signals, determining peak-to-average ratios for at least some of the plurality of candidate signals, identifying a selected signal from the plurality of candidate signals based on the peak-to-average ratios, and transmitting the selected signal over a wireless communication channel. An embodiment further includes a receiver receiving a channel-affected version of the transmitted, selected signal, determining an estimate of a selective mapping index, which identifies the synchronization/pilot sequence from the plurality of synchronization/pilot sequences, applying corrections to the received signal based on estimated channel perturbations to produce an equalized combined signal, and producing an output data symbol from the equalized combined signal. | ||||||
| 45 | Radio Communication System, Radio Communication Apparatus and Radio Communication Method as Well as Computer Program | US11629416 | 2005-05-16 | US20080298808A1 | 2008-12-04 | Kunio Fukuda |
| It is possible to realize remote control in a reflection wave transmission system, and enhance operability for a mobile apparatus having a reflector. The mobile apparatus comprises a reflector and performs reflection wave transmission by carrying data on a reflection wave for unmodulated carrier. A reflection wave reader comprises an infrared light receiving section, receives and decodes a request signal sent as an infrared remote control command, transmits it to the mobile apparatus by an ASK modulated signal and then transmits the unmodulated carrier. The mobile apparatus transmits requested data by reflection wave. The mobile apparatus can be operated from an infrared remote controller and remote control distance can be extended. | ||||||
| 46 | Radio-Communication Control Apparatus And Radio Communication System | US11579132 | 2004-07-29 | US20080094176A1 | 2008-04-24 | Akinori Taira |
| A radio-communication control apparatus controls a plurality of read/write devices that perform reading and writing of data with respect to a plurality of radio tags. A collecting unit collects, from the read/write devices, interference information on interference of reception signals received from the radio tags by the read/write devices. A timing determining unit determines a transmission timing at which the read/write devices transmit information to the radio tags, based on the collected interference information. The read/write devices transmit information to the radio tags based on the determined transmission timing. | ||||||
| 47 | Half duplex device and signal processing method thereof | US10895904 | 2004-07-22 | US20050249135A1 | 2005-11-10 | Yueh-Chang Chen |
| A half duplex device and signal processing method thereof. First, a signal detection unit of a signal detector of a half duplex device obtains a short-term power and long-term power. Next, a data update unit of the signal detector sets a short-term power threshold as a default threshold, determines whether the long-term power is greater than the default threshold, sets the short-term power threshold value equal to the long-term power value if the long-term power value is greater than the default threshold value, and provides smooth performance in a noisy environment. | ||||||
| 48 | SYSTEM AND METHOD FOR DELIVERY OF ELECTRONIC DATA | PCT/US2008073503 | 2008-08-18 | WO2009026242A3 | 2009-05-14 | THIAGARAJAN ARVIND; NARAYANAN SHIVAKUMAR KARATHOZUVU; MUKUNDAN SUNIL; NAMASIVAYAM CHANDRAMOULI; RAVILLA JAISIMHA; MUNIRATHNAM YUVARAJ KARUMANCHI; RAJAKANI GANESAN; ELZIQ YACOUB |
| System and method for compressing data with the use of an Adaptive Progression Pattern and/or Logical Frequency Lexicon. The system and method may also comprise a adaptive learning scheme to update the Adaptive Progression Pattern and/or Logical Frequency Lexicon. | ||||||
| 49 | METHOD AND CIRCUIT INTENDED FOR HIGH-FREQUENCY COMMUNICATION BETWEEN AN INTERROGATOR AND A SMART TAG | PCT/SI2012000026 | 2012-04-30 | WO2013002737A8 | 2013-02-21 | KUNC VINKO; STIGLIC MAKSIMILIJAN; VODOPIVEC ANDREJ |
| A smart tag observes a first amplitude (Ai) being an amplitude of a voltage induced in a tag's antenna by an interrogator's carrier signal and transmits responding signals in that it excites its antenna with a voltage, whose amplitude as a second amplitude (At) is set with respect to said first amplitude (Ai), observed so far, in a way that the second amplitude (At) is inversely proportional to the first amplitude (Ai). The advantageous setting of the amplitude of the tag's responding signals eliminates a too strong electromagnetic emission and saves battery's energy. | ||||||
| 50 | TRANSMISSION DEVICE AND TRANSMISSION SYSTEM | US16098871 | 2016-12-13 | US20190188424A1 | 2019-06-20 | Takanori WASHIRO |
| A transmission device includes a magnetic field antenna and an electric field antenna connected electrically to the magnetic field antenna. When the magnetic field antenna is at a position allowing reception of a magnetic field signal transmitted by another magnetic field antenna included in a magnetic field transmission device, the transmission device becomes capable of transmitting an electric field signal generated on the basis of the magnetic field signal. The electric field antenna is grounded by being connected electrically to a ground to which the magnetic field transmission device is connected. | ||||||
| 51 | Communication terminal, computer-readable storage medium, and communication method | US14976279 | 2015-12-21 | US10123369B2 | 2018-11-06 | Norihito Aoki |
| A communication terminal includes a first communication unit which has a power supply function by electromagnetic induction and writes or reads information in an active or passive mode, and a second communication unit having a communication capability higher than that of the first communication unit. A mode in which the first communication unit is functioning, the active mode or the passive mode, is determined. Communication via the second communication unit is controlled based on the determination result. | ||||||
| 52 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD | US15765893 | 2016-10-26 | US20180287669A1 | 2018-10-04 | Hiroaki Nakano; Masayoshi Abe; Hiroaki Fujita; Hiroshi Matsui |
| This technology relates to a communication apparatus and a communication method adapted to improve the deterioration of communication performance due to variations in parts, for example.A test signal generating section generates a predetermined test signal. A detecting section detects, given a received test signal obtained by a transmitting and receiving section upon receipt of the test signal, an influence parameter affecting the intensity of an active load modulation signal that combines a transmission carrier with a synchronizing signal synchronized with a received signal obtained upon receipt of the transmission carrier. A controlling section controls the intensity of the active load modulation signal in accordance with the influence parameter. This technology applies to cases where short-range wireless communication is performed using magnetic fields. | ||||||
| 53 | COMMUNICATION APPARATUS AND METHOD FOR CONTROLLING COMMUNICATION APPARATUS | US15761503 | 2016-08-16 | US20180270823A1 | 2018-09-20 | KATSUYUKI TANAKA; YUSUKE SHINOHE; FUMITAKA KONDO; TATSUKI AMIMOTO; SHINGO HARADA |
| A communication apparatus performs communication while suppressing an increase in power consumption. The communication apparatus includes a periodic signal generating unit, a clocking unit, a multiplication unit, and a communication processing unit. The periodic signal generating unit generates a predetermined periodic signal. The clocking unit clocks time in synchronization with the predetermined periodic signal generated by a frequency signal generating unit. The multiplication unit multiplies the predetermined periodic signal generated by the frequency signal generating unit to supply the signal as a multiplied signal. The communication processing unit performs predetermined communication processing in synchronization with the multiplied signal generated by the multiplication unit. | ||||||
| 54 | WIRELESS COMMUNICATION SYSTEM | US15759830 | 2017-04-24 | US20180254883A1 | 2018-09-06 | Jin MITSUGI; Yuki IGARASHI; Haruhisa ICHIKAWA; Yuusuke KAWAKITA; Kiyoshi EGAWA |
| Provided is a wireless communication system which enables wireless communication in which crosstalk due to multiple access is canceled while using a large number of inexpensive wireless terminals. In order to generate an interference component, an analysis data sequence is generated by applying a Hilbert transform, by a Hilbert transform, to a subcarrier data sequence obtained by extracting a target subcarrier wave component from a finite length data sequence, while a carrier phase difference Ψ is estimated by using the regression analysis by a carrier wave phase estimation unit. After rotation calculation configured to return the analysis data sequence by the carrier phase difference Ψ is performed, conversion into an angle is performed. Further, a multiplication by a desired odd number of multiplication is performed, and then an inverse Hilbert transform is applied. | ||||||
| 55 | ELECTRONIC APPARATUS AND WIRELESS COMMUNICATION SYSTEM | US15751154 | 2017-02-09 | US20180232618A1 | 2018-08-16 | Masayuki HAYAKAWA; Seiji TANAKA |
| The present invention addresses the problem of preventing the malfunction of an electronic apparatus containing an RFID module with a wired communication port. An electronic apparatus is provided with: an RFID module containing an antenna, a control circuit, a memory connected to the control circuit, and a wired communication port; a processing unit connected to the RFID module via the wired communication port; and a switch that electrically connects or interrupts the antenna and the control circuit. | ||||||
| 56 | OBJECT AND COMMUNICATION PROGRAM | US15745810 | 2016-07-13 | US20180211048A1 | 2018-07-26 | YOSHITAKA TANEMURA; YOHICHIROH TATSUKI; MASAYUKI NAITOH; TOMOYUKI KAWASOE |
| An object includes: a first communication interface unit configured to communicate with a first apparatus; a second communication interface unit configured to communicate with a second apparatus; and a control unit configured to perform control to transmit second information based on first information received from the first apparatus via the first communication interface unit to the second apparatus via the second communication interface unit, and, in a case that communication with the first apparatus via the first communication interface unit ends, perform control to transmit request information for requesting deletion of the second information transmitted to the second apparatus to the second apparatus. | ||||||
| 57 | COMPLIANCE METHOD AND SYSTEM FOR TRAFFIC CONTROL DEVICES | US15568306 | 2016-04-22 | US20180179712A1 | 2018-06-28 | Dominic Mangialardi |
| A sign comprising a substrate having a planar sign face and an opposing planar back face having peripheral side edges; a recessed portion formed within said substrate having an opening and a bottom, and side walls; a RFID tag assembly having a metal shielding sheet, said RFID tag assembly having a mounting substrate, a double-sided adhesive sheet with one side adhered to a metal shielding sheet and an opposing side adhered to said bottom of said recessed portion; a retroreflective sheeting having a double-sided pressure-sensitive adhesive sheeting for application over said RFID tag assembly to hermetically seal said RFID tag assembly within said recessed portion; a translucent vinyl backed material with primary indicia applied to said retroreflective sheeting; and a label with secondary indicia applied to said back face via label adhesive. | ||||||
| 58 | Communication system and work vehicle | US15514158 | 2015-02-27 | US09991928B2 | 2018-06-05 | Eiji Mizutani; Takayuki Koshi |
| A communication system provided to a working vehicle includes: an information receiving unit that communicates with identification devices and receives identification information; a first area information storage that stores first area information indicating an area where use of the information receiving unit is permitted; a comparing unit that compares the first area information with second area information indicating an area where the working vehicle is used; and a communication control unit that prohibits the information receiving unit from outputting electric waves when the second area information is not included in the first area information. | ||||||
| 59 | POWER RECEIVING-TYPE INFORMATION ACQUISITION AND TRANSMISSION DEVICE, AND INFORMATION ACQUISITION SYSTEM | US15563269 | 2016-03-31 | US20180096237A1 | 2018-04-05 | Hiroshi MICHIWAKI |
| This power receiving-type information acquisition and transmission device 101 is provided with one or more power receiving means 110 which receive power supply waves that can supply power, one or more power storage means 120 which store power obtained by the power receiving means, one or more information acquisition means 130 which acquire information by expending at least part of the aforementioned power of the power receiving means 110 and/or the power storage means 120, and one or more information transmission means 140 which utilize the power from the power storage means 120 to transmit information externally. This enables regular or steady information collection, and enables transmitting said information stably, on a permanent basis and remotely, i.e., either over a short or long distance externally. | ||||||
| 60 | WAVEFORM SYNTHESIS FOR RFID TRANSMITTERS | US15037205 | 2013-12-13 | US20180041372A9 | 2018-02-08 | Thomas Frederick |
| A waveform synthesis technique for radio frequency identification (RFID) transmitters and an RFID system making us of the technique are disclosed. The RFID transmitter in example embodiments synthesizes a continuous transmitter waveform from a symbol alphabet without Nyquist or interpolation filters. High spectral occupancy waveforms are achieved which include the ability to do both linear and nonlinear predistortion with no increase in computational load once the signal set has been adapted to compensate for linear and nonlinear distortion in the transmitter analog circuitry. A polarity generator can be used to impart the required polarity to each waveform. The RFID transmitter can be employed in RFID readers to reduce the computational requirements of the digital signal processor (DSP). | ||||||
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