Automatic Adjustment Of Tuning Patents (Class 455/125)
  • Patent number: 10673514
    Abstract: A communication device, method, and computer program product provide configuring, by a controller, a switching matrix of a radio frequency (RF) frontend of the communication device to a receive antenna tuning mode. The receive antenna tuning mode communicatively couples a transmitter to a first receive antenna of one or more receive antennas. A reference signal is transmitted using the first receive antenna at a selected transmit power level setting of the transmitter. A feedback receiver measures magnitude and phase values of both a forward coupled transmission signal and a reverse coupled reflection signal of the reference signal. An impedance value of the first receive antenna is determined based on the measured magnitude and phase values and the reference signal transmitted at the selected transmit power level setting. The first receive antenna is tuned by an antenna tuning module using the impedance value.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: June 2, 2020
    Assignee: Motorola Mobility LLC
    Inventor: Armin Klomsdorf
  • Patent number: 10535927
    Abstract: An embedded antenna system is described for use with metallized enclosures and housings used with wireless communication devices. One or multiple radiators are coupled to a metal cover, with ground points established on the metal cover to improve radiation efficiency and control the frequency response of the antenna system. Dynamic tuning methods are described wherein detuning of the antenna system for sources such as body-loading are compensated at adjusting impedance properties of the combination of radiator and metallized cover.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: January 14, 2020
    Assignee: Ethertronics, Inc.
    Inventors: Olivier Pajona, Laurent Desclos, Abhishek Singh
  • Patent number: 9985353
    Abstract: An embedded antenna system is described for use with metallized enclosures and housings used with wireless communication devices. One or multiple radiators are coupled to a metal cover, with ground points established on the metal cover to improve radiation efficiency and control the frequency response of the antenna system. Dynamic tuning methods are described wherein detuning of the antenna system from sources such as body-loading are compensated by adjusting impedance properties of the combination of radiator and metallized cover.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: May 29, 2018
    Assignee: Ethertronics, Inc.
    Inventors: Olivier Pajona, Laurent Desclos, Abhishek Singh
  • Patent number: 9647326
    Abstract: A design for high-efficiency broadband antennas which includes a D-plate and an E-cylinder, electrically insulated from each other, the E-cylinder being above the D-plate, and both parts insulated from a ground plane. The E-cylinder and D-plate may be fed by distinct feed networks with adjustable impedance.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: May 9, 2017
    Assignee: WorldWide Antenna Systems LLC
    Inventor: Kurt Gorman
  • Patent number: 9621221
    Abstract: A full duplex radio includes self-interference cancellation circuitry for reducing self-interference. The self-interference cancellation circuitry may receive analog radio frequency signals that are to be transmitted by an antenna, and downconvert and digitize the signals to provide a digital baseband signal for processing, for example by an adaptive filter. The filtered signal may be converted to an analog signal and applied in an analog portion of a receive chain of a receiver of the full duplex radio. Preferably the analog signal is applied in the receive chain after low noise amplification of received signals of interest.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: April 11, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yingbo Hua, Ping Liang
  • Patent number: 9003426
    Abstract: A multi-display device can interface with two or more different types of docking stations. The device can determine the type of dock and change the pin outs for a connector to interface with that dock. Once docked, the device can determine a charge status for the device and the dock to present the status to the user. Further, the dock can enter one of several modes, including a call receipt mode and an entertainment mode. The modes allow for expanded functionality for the device while docked. Two particular docks, the laptop dock and the smart dock, provide special functionality with the device.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 7, 2015
    Assignee: Z124
    Inventor: Anthony Russello
  • Patent number: 8988196
    Abstract: A method of power recovery by an electromagnetic transponder in the field of a terminal, wherein: a ratio of the current coupling factor of the transponder with the terminal to an optimum coupling position with a resistive load value is evaluated; and a detuning of the oscillating circuit is caused if the ratio is greater than a first threshold greater than or equal to one.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: March 24, 2015
    Assignee: STMicroelectronics (Rousset) SAS
    Inventor: Luc Wuidart
  • Patent number: 8965392
    Abstract: Systems and methods of mobile traffic categorization and policy implementation for network use optimization are disclosed. In one aspect, embodiments of the present disclosure include a method, which may be implemented on a system, of detecting an activity state of an application on a mobile device to which traffic is originated from or directed to, detecting a time criticality of data contained in the traffic to be sent between the mobile device and the host server, determining a timing with which to allow the traffic to pass through, based on the activity state or the time criticality and/or controlling radio use on the mobile device based on the timing with which the traffic is allowed to pass through. The method may further include selecting a network configuration in the wireless network for use in passing traffic to and from the mobile device.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: February 24, 2015
    Assignee: Seven Networks, Inc.
    Inventors: Ari Backholm, Michael Luna
  • Patent number: 8903002
    Abstract: A computational processor uses a binary signal, being a set of 1- or 0-valued elements of a same number as a number of elements in an input signal, to generate computational data whose elements are exclusive OR values between each element of the input signal and a corresponding element in the binary signal at a same position. The modulator 13 modulates the input signal and the computational data according to a primary modulation scheme, and generates primary-modulated signals. An IFFT calculator applies an inverse fast Fourier transformation to the primary-modulated signals to generate inverse transformation data. A transmitter generates a baseband signal based on generated inverse transformation data whose peak-to-average power ratio matches a standard, and generates and transmits a transmission signal from the baseband signal and data specifying computations conducted to generate the inverse transformation data that matches the standard.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: December 2, 2014
    Assignee: Icom Incorporated
    Inventor: Nobuyoshi Nishikawa
  • Patent number: 8886139
    Abstract: A first plurality of training data units are transmitted via a plurality of antennas of a first station as part of a first transmit beamforming training procedure. Subsequently, a second plurality of training data units are received via the plurality of antennas as part of second transmit beamforming procedure while the first station applies a single receive antenna configuration. The second plurality of training data units includes an information element that specifies a feedback from a second station, the feedback including an identifier corresponding to one of the training data units in the first plurality of data units. The first station transmits a feedback message to the second station, that includes (i) one or more indicators of one or more training data units selected from the second plurality of training data units, and (ii) a request to perform a subsequent beamforming training procedure.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: November 11, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Manyuan Shen, Songping Wu, Hui-Ling Lou, Yong Liu
  • Patent number: 8868010
    Abstract: A synthetic-frequency RF transmitter is provided for transmitting an electromagnetic signal via an electrically short antenna. The transmitter comprises a reactive energy storage with an effective reactance adapted to form with the antenna a resonance circuit with a resonance frequency and a driver adapted to provide to the resonance circuit an electric transmission signal having an instantaneous frequency that varies in dependence on an information signal. The transmitter is characterized in that the transmitter is adapted to dynamically change the resonance frequency by changing the effective reactance in dependence on the information signal. Thus, the instantaneous pass-band of the resonance circuit may be controlled to substantially always comprise the instantaneous frequency of the electric transmission signal and thus of the electromagnetic signal.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: October 21, 2014
    Assignee: Oticon A/S
    Inventor: Kåre Tais Christensen
  • Patent number: 8861641
    Abstract: A wireless communication device includes a mixer that multiplies quadrature-modulated transmission data by a local oscillation frequency signal and outputs a high-frequency signal; a distributor that distributes the high-frequency signal; a detector circuit that detects a direct current component included in the high-frequency signal, based on the high-frequency signal distributed by the distributor; a correction signal generating unit that generates a correction signal for removing the direct current component from the high-frequency signal, based on the direct current component detected by the detector circuit; a correction unit that corrects the high-frequency signal by the correction signal generated by the correction signal generating unit; and a transmission unit that transmits the high-frequency signal that has been corrected by the correction unit.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: October 14, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Shinya Oka, Takashi Okada
  • Patent number: 8849194
    Abstract: Methods and systems for a mesh network utilizing leaky wave antennas (LWAs) are disclosed and may include configuring one or more devices as a mesh network in a wireless device coupled to a plurality of LWAs, and communicating data between said devices via the configured mesh network. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. A plurality of the LWAs may be configured to enable beamforming. The LWAs may comprise microstrip or coplanar waveguides, wherein a cavity height of the LWAs is dependent on spacing between conductive lines in the waveguides. The plurality of LWAs may be integrated in one or more of: integrated circuits, integrated circuit packages, and printed circuit boards. The devices may be internal to the wireless device. The data may be communicated via the mesh network to devices external to the wireless device.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: September 30, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8843061
    Abstract: Methods and systems for power transfer utilizing leaky wave antennas (LWAs) are disclosed and may include configuring one or more LWAs in a communication device to receive RF signals that are communicated from one or more other LWAs that are external to the communication device. The communication device may be powered utilizing the RF signals that are received via the configured LWAs. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. The LWAs may be configured to receive the RF signals from a desired direction. The LWAs may comprise microstrip or coplanar waveguides, wherein a cavity height of the LWAs is dependent on spacing between conductive lines in the waveguides. The LWAs may be integrated in integrated circuits, integrated circuit packages, and/or printed circuit boards. The packages may be affixed to printed circuit boards and the integrated circuits may be flip-chip-bonded to the packages.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: September 23, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8837635
    Abstract: Embodiments provide systems and methods to dynamically control a radio frequency (RF) transmitter based on monitored error vector magnitude (EVM) performance. Embodiments are enabled by a feedback path that allows estimating the EVM at the output of the transmitter and controlling the transmitter, including the power amplifier (PA), accordingly. As such, the transmitter (and the PA) can be operated as close as possible to the ideal operating point that meets, based on actual conditions, a specified EVM performance and desired output power. By doing so, the overall power consumption of the transmitter is reduced.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: September 16, 2014
    Assignee: Broadcom Corporation
    Inventors: Robert Lorenz, Djordje Tujkovic
  • Publication number: 20140242929
    Abstract: A method and arrangement for transmitting and receiving RF signals, associated with different radio interfaces of communication systems, employ a direct conversion based transceiver which substantially comprises one receive signal branch and one transmit signal branch. Mixing frequencies of the different systems are generated by a single common by use of an output frequency divider in combination with the synthesizer, and by use of filtering corresponding to a system channel bandwidth by means of a controllable low-pass filter operating at baseband frequency.
    Type: Application
    Filed: May 7, 2014
    Publication date: August 28, 2014
    Applicant: Nokia Corporation
    Inventors: Risto Väisänen, Kim Kaltiokallio
  • Publication number: 20140235186
    Abstract: A method for generating a radio frequency signal, wherein a signal to be transmitted is decomposed into a weighted sum of periodic basic signals of different frequencies.
    Type: Application
    Filed: February 11, 2014
    Publication date: August 21, 2014
    Applicants: Institut Polytechnique de Bordeaux, STMicroelectronics S.A.
    Inventors: Didier Belot, Yann Deval, Francois Rivet
  • Patent number: 8812045
    Abstract: The present invention relates to a wireless access system, and more particularly, to a method for controlling uplink transmission power in consideration of a transmission rank in a multi-antenna environment. A method for controlling the transmission power of an uplink data channel at a transmitting end which supports a plurality of transmission ranks according to one embodiment of the present invention, comprises the steps of: determining a first transmission power using at least one rank variable dependent on the transmission rank in a specific subframe; comparing the determined first transmission power with a second transmission power which is the preset maximum transmission power; and determining the value judged to be smaller than the result of the comparison to be the transmission power of the data channel.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: August 19, 2014
    Assignee: LG Electronics Inc.
    Inventors: Bong Hoe Kim, Byeong Woo Kang, Dae Won Lee, Yu Jin Noh, Ki Jun Kim, Joon Kul Ahn
  • Patent number: 8798555
    Abstract: A system can obtain an operational metric associated with the transceiver, determine a target figure of merit based on a compromise between a desired transmitter performance and a desired receiver, determine a current figure of merit based on the operational metric, and adjust the variable reactance component of the impedance matching circuit based on a comparison of the current figure of merit with the target figure of merit. Other embodiments are disclosed.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: August 5, 2014
    Assignee: BlackBerry Limited
    Inventor: Matthew Greene
  • Patent number: 8799417
    Abstract: The illustrative embodiments described herein provide a method, apparatus, and computer program product for customizing settings in a communication device for a user. In one illustrative embodiment, the process identifies a user profile to which a user belongs. The process identifies a set of custom communication device settings associated with the user profile. The process also sets a current set of communication device settings for a set of functions in a communication device to the set of custom communication device settings. In one embodiment, identifying the user profile to which the user belongs includes identifying the user profile to which the user belongs based on one or more characteristics of the user.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: August 5, 2014
    Assignee: CenturyLink Intellectual Property LLC
    Inventor: Catherine M. Pearce
  • Publication number: 20140213202
    Abstract: A medical device communication system transmitter may include a resonator coupled to a local oscillator for stabilizing an operating frequency of the local oscillator. A control device of the transmitter receives an open-loop control signal, and the local oscillator and the control device are configured to generate a direct modulated radio frequency transmission signal in response to the open-loop control signal.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Applicant: MEDTRONIC, INC.
    Inventors: Yu Wang, George C. Rosar
  • Patent number: 8792937
    Abstract: A computing device with a configurable antenna. The antenna is configured through a switching circuit operating under software control. Operating characteristics of the antenna are configured based on connections between conducting segments established by the switching circuit, allowing the nominal frequency, bandwidth or other characteristics of the antenna to be configured. Because the switching is software controlled, the configurable antenna may be integrated with a software defined radio. The radio and antenna can be reconfigured to support communication according to different wireless technologies at different times or to interleave packets according to different wireless technologies to support concurrent sessions using different wireless technologies.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: July 29, 2014
    Assignee: Microsoft Corporation
    Inventors: Amer A. Hassan, Christian Huitema
  • Publication number: 20140206304
    Abstract: A first plurality of training data units are transmitted via a plurality of antennas of a first station as part of a first transmit beamforming training procedure. Subsequently, a second plurality of training data units are received via the plurality of antennas as part of second transmit beamforming procedure while the first station applies a single receive antenna configuration. The second plurality of training data units includes an information element that specifies a feedback from a second station, the feedback including an identifier corresponding to one of the training data units in the first plurality of data units. The first station transmits a feedback message to the second station, that includes (i) one or more indicators of one or more training data units selected from the second plurality of training data units, and (ii) a request to perform a subsequent beamforming training procedure.
    Type: Application
    Filed: March 21, 2014
    Publication date: July 24, 2014
    Applicant: MARVELL WORLD TRADE LTD.
    Inventors: Hongyuan Zhang, Manyuan Shen, Songping Wu, Hui-Ling Lou, Yong Liu
  • Patent number: 8787847
    Abstract: A method and an apparatus for calibration of a transmitter not having a Surface Acoustic Wave (SAW) filter are provided. The apparatus includes a calibration unit for outputting a detuning signal by which a resonance frequency of a Radio Frequency (RF) circuit is detuned with respect to a transmit operating frequency, and an RF unit for changing the resonance frequency according to the detuning signal and for outputting an out-of-band noise and a transmit signal having a relatively lower power than that of a case where the resonance frequency and the transmit operating frequency are tuned to each other.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: July 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Si-Bum Jun, In-Yup Kang, Min-Goo Kim, Chang-Joon Park, Won-Suk Choi
  • Patent number: 8781415
    Abstract: A distortion module includes a first module, at least one module and a correction module. The first module is configured to (i) receive radio frequency signals from radio frequency sensors of a power amplifier, and (ii) generate a distortion signal indicating distortion values for the radio frequency signals. The radio frequency signals are indicative of radio frequency power out of the power amplifier and received by a transmission line. At least one module is configured to estimate a phase of the distortion signal. The phase of the distortion signal is indicative of a phase of the transmission line. The correction module is configured to generate a distortion correction signal based on the phase to correct at least one of the distortion values of the radio frequency signals.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: July 15, 2014
    Assignee: MKS Instruments, Inc.
    Inventors: David J. Coumou, Larry J. Fisk
  • Patent number: 8774743
    Abstract: Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: July 8, 2014
    Assignee: BlackBerry Limited
    Inventors: Shirook Ali, James Paul Warden, Mohamed Bakr
  • Patent number: 8750816
    Abstract: A process of estimating an admittance of an RF component using a ladder network with alternating series and parallel components by making three VSWR measurements and computing three admittance circle solutions in the complex admittance plane. The admittances circles are transformed through reference planes of the ladder network to obtain three RF component admittance circles, then estimating the RF component admittance using three nearest intersections of the three RF component admittance circles. Reference planes are defined immediately upstream and immediately downstream of each component of the ladder network. The transforms are performed using lumped parameter models of the series and parallel components of the ladder network.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: June 10, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Charles Sestok, Kun Shi
  • Patent number: 8744513
    Abstract: Methods, apparatuses, and articles of manufacture are disclosed for adjusting a power level in connection with transmitting parallel uplink channels. In one aspect, a user equipment determines a power-limited condition in which a total transmit power of a group of power-controlled channels exceeds a maximum level in a transmission subframe. The user equipment may determine, in an iterative fashion, power backoff values by which to establish a configured maximum power level. The parallel uplink channels in the group may be prioritized and different backoff values may be used with channels having different priorities. The user equipment may thereafter adjust a transmit power of the power-controlled channels based on the configured maximum power level.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: June 3, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Wanshi Chen, Tao Luo, Peter Gaal, Juan Montojo
  • Patent number: 8725093
    Abstract: The present invention discloses a multi-mode full frequency band radio frequency transmission device comprising a radio frequency switch chip positioned in the latter stage of the radio frequency main amplifier chip and configured to integrate all solid switch elements. Each of the solid switch elements comprises a transfer switch used when values of a variable capacitor and a variable inductor are controlled. The variable capacitor and the variable inductor are configured to control values of passive elements in an input switch matching circuit/output switch matching circuit to implement a single input/output matching circuit. The present invention further discloses a multi-mode full frequency band radio frequency transmission method comprising controlling values of passive elements in an input switch matching circuit/output switch matching circuit through the variable capacitor and the variable inductor to implement a single input/output matching circuit.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: May 13, 2014
    Assignee: ZTE Corporation
    Inventor: Xin Liu
  • Patent number: 8718581
    Abstract: Apparatus and method for reducing the current consumption and increasing the efficiency of an RF power amplifier (PA), according to which the load, connected to the output stage of the PA, tuned dynamically or statically for each level of the desired output power. By doing so, the output impedance of the output stage is essentially matched, such that the dynamic RF load line has a slope that corresponds to the impedance required to provide this level. Whenever a smaller output power is desired in response to reduction in the input signal to the amplifier, the load is further tuned, such that the dynamic or static RF load line has a slope that causes the power amplifier to essentially remain in saturation at the smaller output power.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: May 6, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: Avner Elia
  • Patent number: 8704604
    Abstract: Systems and methods for operating with oscillators configured to produce an oscillating signal having an arbitrary frequency are described. The frequency of the oscillating signal may be shifted to remove its arbitrary nature by application of multiple tuning signals or values to the oscillator. Alternatively, the arbitrary frequency may be accommodated by adjusting operation one or more components of a circuit receiving the oscillating signal.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: April 22, 2014
    Assignee: Sand 9, Inc.
    Inventors: Klaus Juergen Schoepf, Reimund Rebel, Jan H. Kuypers
  • Patent number: 8693963
    Abstract: An embodiment of the present disclosure provides a variable impedance circuit including an antenna having a tunable component. The tunable component can be operable to receive a variable signal to cause the tunable component to change an impedance of the antenna. The tunable component can include a first conductor coupled to the antenna, a second conductor, and a tunable material positioned between the first conductor and the second conductor, where at least one of the first conductor or the second conductor, or both are adapted to receive the variable signal to cause the change in the impedance of the antenna. Additional embodiments are disclosed.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: April 8, 2014
    Assignee: BlackBerry Limited
    Inventors: Cornelis Frederik du Toit, Deirdre A Ryan, Gregory Mendolia, James Martin, Izz Khayo, Heinz Bachmann, William E. McKinzie
  • Patent number: 8644779
    Abstract: An apparatus and a method of realizing an antenna matching in accordance with a user's body effect and a state of a mobile device are provided. The method includes determining a state of the mobile device on a basis of a call mode and at least one of whether an external device is connected to the mobile device, whether a receiver is being used, whether a speaker is being used, and whether a proximity sensor is activated, determining an optimal Tunable Matching Network (TMN) circuit adjustment value in accordance with the determined state, and performing the antenna matching in accordance with the optimal TMN circuit adjustment value.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: February 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong Joo Shin, Jae Ho Lee, Wan Sang Ryu, Da Jeong Kim, Ji Yeon Yun, Jin Woo Jung
  • Patent number: 8594695
    Abstract: A method of dynamically adjusting a wireless transceiver may include acquiring a geographical location of the wireless transceiver and determining transmission characteristics that are compliant with wireless regulations covering the geographical location. The wireless transceiver may be adjusted to conform to the transmission characteristics, and data may be transmitted with the adjusted wireless transceiver.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: November 26, 2013
    Assignee: Intel Corporation
    Inventor: Sean Dunn
  • Patent number: 8594589
    Abstract: This invention provides a power amplifier (100) including a signal source control unit (110) which generates and outputs an amplitude signal serving as the amplitude modulated component of an input signal and a pulse modulated signal based on the amplitude signal, and outputs a transmission signal obtained by superposing the input signal on a carrier, a delay adjustment unit (120) which synchronizes the amplitude signal, pulse modulated signal, and transmission signal with each other, a voltage signal generation unit (130) which outputs a voltage signal corresponding to the amplitude signal synchronized with the transmission signal, a current signal generation unit (140) which outputs a current signal corresponding to the pulse modulated signal synchronized with the transmission signal, and a transmission signal amplification unit (150) which amplifies the transmission signal, and outputs a transmission signal obtained by modulating the amplitude of the amplified transmission signal based on a modulated power
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: November 26, 2013
    Assignee: NEC Corporation
    Inventors: Shingo Yamanouchi, Kazuaki Kunihiro
  • Patent number: 8594660
    Abstract: An apparatus includes a report configuration controller configured to command reporting an event defined by receipt of a plurality of signals of different senders, wherein the signals are received at a same location, the signals are received with a strength above an absolute threshold, and a difference of the strengths is within a relative threshold. Another apparatus includes an aggregator configured to aggregate information reflecting an event defined by receipt of a plurality of signals of different senders, wherein the signals are received at a same location, the signals are received with a strength above an absolute threshold, and a difference of the strengths is within a relative threshold; and an aggregated information provider configured to provide the aggregated information.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: November 26, 2013
    Assignee: Nokia Siemens Networks Oy
    Inventors: Ingo Viering, Martin Doettling
  • Patent number: 8583183
    Abstract: A system and method for implementing transmission parameter control at a transmitting station is described. The exemplary system and method comprises querying a transmission parameter control module for a transmission schedule. The transmission schedule comprises at least one schedule entry defining a set of transmission parameter controls as they pertain to a destination address. At least one packet of data is then transmitted to the destination address according to the transmission parameters controls of at least one schedule entry from the transmission schedule. A system and method for selecting an antenna configuration corresponding to a next transmission of packet data is also disclosed.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: November 12, 2013
    Assignee: Ruckus Wireless, Inc.
    Inventors: William Kish, Victor Shtrom, John Chanak
  • Patent number: 8565823
    Abstract: A basestation in a cellular communication system corrects frequency errors in signals generated within the basestation. The frequency errors may be corrected on the basis of signals transmitted by one or more other basestation within the network. As an alternative, the basestation may request information from one or mobile devices that are also able to detect transmissions from other basestations.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: October 22, 2013
    Assignee: Ubiquisys Limited
    Inventors: Alan Carter, Stephen Whittaker
  • Patent number: 8532592
    Abstract: A mixed-signal adaptive integrated circuit may comprise a primary function circuit, a digitally controlled analog sub-system cooperatively connected with the primary function circuit, and an on-chip signal analyzer. The on-chip signal analyzer may be arranged to analyze RF signals. The signal analyzer may comprise at least one multiplexor for selecting selected RF signals for comparison and analysis, and may comprise a digital signal processor (DSP) for analyzing the selected RF signals and adjusting at least one operational parameter of the digitally controlled analog sub-system responsive to the analysis.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: September 10, 2013
    Assignee: Scintera Networks, Inc.
    Inventors: Qian Yu, Abhijit G. Shanbhag, Yan Wang
  • Patent number: 8520767
    Abstract: A transmission circuit adjust a difference between signal delay amounts in an amplitude path and a phase path with a low power consumption. An amplitude modulation section amplitude-modulates a phase modulation signal outputted from a phase modulation section with a voltage control signal provided by a regulator to generate a transmission signal for an output of an antenna. Similarly, a feedback signal generation section amplitude-modulates the phase modulation signal with a voltage control signal to generate a feedback signal. The signal is fed back to a delay adjustments sections used for calculating and adjusting the difference between the signal delay amounts in the amplitude path and the phase path. The feedback signal generation section is attained by a power amplifier having the same configuration as the amplitude modulation section and a smaller circuit scale.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: August 27, 2013
    Assignee: Panasonic Corporation
    Inventors: Yukihiro Omoto, Shigeru Morimoto
  • Patent number: 8489109
    Abstract: A mobile wireless device enables effective use of space in a case while reducing degradation of antenna gain and maintaining communication quality even if a plurality of antennas having different frequency bands are arranged close to one another. A magnetic antenna has a first switch unit, a second switch unit, and a concentrated constant circuit which are added to a wiring pattern at the side near to a main antenna, so that a first path and a second path can be selected. Under a predetermined condition, a CPU controls the first switch and the second switch to electrically connect terminal (A1) to terminal (B1) and electrically connect terminal (A2) to terminal (B2), thereby forming the first path; and electrically connect terminal (A1) to terminal (C1) and electrically connect terminal (A2) to terminal (C2), thereby forming the second path connected via the concentrated constant circuit.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: July 16, 2013
    Assignee: KYOCERA Corporation
    Inventors: Kenji Waku, Tadashi Koyama, Kunihiko Watanabe, Mitsuhiro Nishizono, Katsuji Morishita, Takeshi Iwanaga, Daisuke Togashi
  • Patent number: 8483626
    Abstract: Present software-defined radios (SDR) employ front end circuits that contain multiple receivers and transmitters for each band of interest, which is inflexible, expensive and power inefficient. A programmable front end circuit is implemented on a CMOS device and is configurable to transmit and receive signals in a wide band of frequencies, thereby providing an adaptable transmitter and receiver operable with current and future wireless networking technologies.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: July 9, 2013
    Assignee: Newlans, Inc.
    Inventor: Dev V. Gupta
  • Patent number: 8472904
    Abstract: In various embodiments, systems and methods for automatically tuning an antenna to a desired frequency utilize a tuning detection element that sends or receives a signal in accordance with one mode of the antenna and that is separated from the antenna by a gap and outside of a signal path of the antenna. In various system implementations, a processor communicates with the tuning detection element and antenna and monitors the amplitude of a signal transmitted to or from the tuning detection element. A resonant frequency of the antenna may be tuned to the desired frequency by a tuning element.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: June 25, 2013
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventor: Douglas W. White
  • Patent number: 8433256
    Abstract: A communication device includes an integrated circuit having an on-chip thermal sensing circuit that generates a temperature signal based on a temperature of the integrated circuit. A processing module processes the temperature signal to generate temperature information that can be transmitted to a remote device or processes the temperature signal to generate control for adjusting transmit and/or receive characteristics of an RF transceiver.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: April 30, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8433261
    Abstract: A radio frequency (RF) communications device may include a power amplifier, an antenna, a tunable coupler between the power amplifier and the antenna, a processor, and an exciter module coupled between the processor and the power amplifier and generating an RF signal based upon a baseband signal. The processor may be configured to set the tunable coupler to a desired tuning and thereby defining a transfer function for the tunable coupler, and to generate an inverse transfer function of the transfer function of the tunable coupler. The processor may be configured to perform digital filtering upstream of the power amplifier based upon the inverse transfer function.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: April 30, 2013
    Assignee: Harris Corporation
    Inventor: Andrew Mui
  • Patent number: 8428523
    Abstract: A non-transitory computer-readable storage medium includes computer instructions to determine a translation function based on a transmit frequency of a transmit mode and a receive frequency of a receive mode of a transceiver for a communication device, and adjust a variable reactance component of an impedance matching circuit for the receive mode based on the translation function, where the impedance matching circuit is operably coupled with an antenna of the communication device. Other embodiments are disclosed.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: April 23, 2013
    Assignee: Research In Motion RF, Inc.
    Inventor: Matthew Greene
  • Patent number: 8395485
    Abstract: A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two pairs of inductive and capacitive values of this oscillating circuit is compared with one or several thresholds, the two pairs of values preserving a tuning of the oscillating circuit to a same frequency.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: March 12, 2013
    Assignee: STMicroelectronics (Rousset) SAS
    Inventor: Luc Wuidart
  • Patent number: 8391804
    Abstract: A method and apparatus for providing close proximity antenna measurement and tuning, includes a first receive-only antenna, a second antenna operable in a transmit mode, a tuning circuit coupled to the first antenna, a transmitter coupled to the second antenna, a receiver coupled to the first antenna, the receiver operable to measure a power into the first antenna delivered by a signal from the second antenna driven by the transmitter, and a processor coupled to the tuning circuit, transmitter, and receiver, the processor operable to step changes in the tuning circuit until a substantially maximum power of the signal is measured by the receiver.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: March 5, 2013
    Assignee: Symbol Technologies, Inc.
    Inventors: Mark W. Duron, Rehan K. Jaffri, Richard T. Knadle
  • Patent number: 8351850
    Abstract: An apparatus for emitting and receiving radio-frequency signals includes a circuit to cancel interference. The apparatus transmits and receives signals using an antenna, and isolates the transmission and receiving circuitry. The circuit taps a first part of a signal to be transmitted, and controls the amplitude and phase of this signal. The circuit then introduces the first part of the signal into the receiver after the first part of the signal has been amplified and phase-shifted, so as to cancel in the receiver interference due to portions of the signal that have undesirably entered the receiver.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: January 8, 2013
    Assignee: Thales Nederland B.V.
    Inventors: Rogier Herman Van Aken, Jan Martinus Schouten, Hubert Langeraar
  • Patent number: 8351874
    Abstract: Methods and apparatus are disclosed for automatically adjusting antenna impedance match in a wireless transceiver employing phase-amplitude modulation. According to some embodiments of the invention, a wireless transceiver comprises a transmitter circuit and a receiver circuit connected to the antenna by a transmit/receive duplexer. An electronically adjustable matching network is located between the transmitter output and the antenna. To control the adjustable matching network, a directional coupler is located between the transmitter output and the matching network to separate transmit signals reflected from the antenna system, including the antenna, the matching network and the T/R duplexer. The reflected transmit signals are routed to the receiver circuit, which digitizes the reflected signal and determines an antenna reflection coefficient based on the digitized reflected signal and the modulation signal used to create the transmit signal.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: January 8, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Paul Wilkinson Dent, Sven Mattisson