Receiver Or Analog Modulated Signal Frequency Converter Patents (Class 455/130)
  • Patent number: 10271273
    Abstract: Systems and method are provided for dynamically adjusting relay methodology based on current radio frequency channel conditions by selecting an optimal relay method. Radio relay systems that can dynamically adapt their relay modes in accordance with embodiments of the present disclosure can achieve useful power savings over conventional relay systems designed for worst case scenario operation.
    Type: Grant
    Filed: April 29, 2017
    Date of Patent: April 23, 2019
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventor: Aaron E. Cohen
  • Patent number: 10254386
    Abstract: An access point may include a radio. The radio may receive a waveform, and the waveform may comprise a plurality of pulses. The access point may further include a hardware processor coupled to the radio. The hardware processor may determine a model of the received waveform. Determining a model of the received waveform may include extracting a plurality of characteristics corresponding to the received waveform, determining a plurality of parameters, wherein each of the plurality of parameters is based on a corresponding characteristic of the plurality of characteristics, and constructing an output waveform model based on the plurality of parameters, wherein the output waveform model corresponds to the received waveform. The hardware processor may further transmit the output waveform model to the hardware processor as an input waveform, wherein the input waveform is to tune the model.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: April 9, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Andre Beaudin, Gilbert Moineau, Scott McGrath
  • Patent number: 10211867
    Abstract: Various embodiments are described herein that improve the signal reception and transmission capabilities of an access point by coupling an active antenna assembly to the access point. An active antenna assembly includes an antenna and at least one active component, such as a low-noise amplifier or a power amplifier. The active component can be connected to an antenna circuit board rather than the main circuit board of the access point, which is typically retained within an access point housing. By positioning the active component near the antenna, the active antenna assembly prevents degradation of signals received by the antenna. One or more coaxial cables can be used to connect the active component of the active antenna assembly to the main circuit board of the access point.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: February 19, 2019
    Assignee: NETGEAR, INC.
    Inventors: Joseph Amalan Arul Emmanuel, Shun-Liang Yu, Mark G. Merrill, Peiman Amini
  • Patent number: 10212679
    Abstract: The propagation channel in a wireless communication system may be characterized as a multipath fading model wherein the multiple delayed and attenuated versions of the transmitted signal are received. In the receiver's processing chain, the impairments introduced by this propagation channel may be equalized using the channel estimates. The channel estimation is mainly performed using the known reference signals by conventional methods. The estimation of delay spread profile may be crucial for high performance channel estimation. The conventional methods may be appropriate for high operating channel bandwidths. In the case of low channel bandwidth, limited number of reference signals may be available which may not be adequate for accurate delay spread estimation. A method and apparatus are disclosed that improve the delay spread estimation for low channel bandwidth scenarios.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: February 19, 2019
    Assignee: MBIT WIRELESS, INC.
    Inventors: Keerthivasan Suresh, Anandhavadivel Sepperumal, Karthik Thirukannan, Krishnavelan Sivaraman
  • Patent number: 10171191
    Abstract: A broadcast receiving apparatus includes a reception unit, sound controlling unit, and determination unit. The reception unit receives a signal of an analog broadcast and a signal of a digital broadcast having the same broadcast content. The sound controlling unit performs, when an output of the broadcast receiving apparatus switched into the analog broadcast from the digital broadcast, a switching control of switching the output into the analog broadcast from the digital broadcast so that an acoustic characteristic of the output digital broadcast gradually approaches an acoustic characteristic of the analog broadcast based on a reception intensity of the signal of the analog broadcast. The determination unit determines, after the sound controlling unit starts the switching control, whether or not the switching control performed by the sound controlling unit is to be continued, based on reception state of the signal of the digital broadcast.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: January 1, 2019
    Assignee: DENSO TEN Limited
    Inventors: Yuya Terashima, Kenichi Nakano
  • Patent number: 10148475
    Abstract: A receiver receives a load modulated analog input signal and outputs digital data detected in the input signal. An in-phase correlator and a quadrature-phase correlator for each of an in-phase component and an quadrature-phase component correlate the in-phase component and the quadrature-component with an in-phase component and a quadrature-phase component of a subcarrier or code clock frequency of the input signal. A combiner combines four output signals of the two in-phase correlators and the two quadrature-phase correlators. A slicer samples an output signal of the combiner at maximum energy levels to output the digital data detected in the input signal.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: December 4, 2018
    Assignee: PANTHRONICS AG
    Inventor: Jakob Jongsma
  • Patent number: 10108522
    Abstract: One embodiment provides a method, including: identifying an application executing across a plurality of processors, wherein the application generates communication messages between the plurality of processors; collecting, using a profiler, a plurality of samples of the messages, wherein the plurality of samples are collected at a predetermined sampling rate and wherein the collecting comprises interrupting the execution of the application to collect a sample; determining, using an adaptive sampling technique, if the sampling rate comprises a sampling rate that is sufficiently low while meeting a predetermined quality threshold; adjusting, based upon the sampling rate not comprising a sampling rate that is sufficiently low, the sampling rate, and then collecting samples until the sampling rate comprises the sampling rate that is sufficiently low while meeting a predetermined quality threshold; and building, using the collected samples, an output performance profile of the application.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: October 23, 2018
    Assignee: International Business Machines Corporation
    Inventors: Nitisha Jain, Prakash Murali
  • Patent number: 10069692
    Abstract: Various embodiments relate to an electronic device and method for providing information. The electronic device receives status information of an external device and then displays a combination of the received status information and stored user information, e.g., phonebook, of the external device. The external device creates or updates the status information thereof and delivers the created or updated status information to the electronic device. The electronic device displays the received status information of the external device on a specific region.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: September 4, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yongjoon Jeon, Junghun Kim, Jihyun Kim
  • Patent number: 9991994
    Abstract: A method and terminal device for reducing an image distortion are provided. The terminal device generates a radio frequency signal from a first path that includes first and second low pass filters of in-phase and quadrature phase paths, produces a decomposed signal having in-phase and quadrature phase components in digital form based on the radio frequency signal, and determines a phase mismatch between the in-phase and quadrature phase components. Then the terminal device generates a bandwidth adjustment value based on the determined phase mismatch, further generates, based on the bandwidth adjustment value, first and second bandwidth control signals; and adjusts a bandwidth of first and second low pass filters based on the first and second bandwidth control signals to reduce the phase mismatch.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: June 5, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Hong Jiang, Wael Al-Qaq, Zhihang Zhang, Eric Sung
  • Patent number: 9960948
    Abstract: A receiver comprises a Low Noise Amplifier (LNA) configured to amplify an input signal and a resonant circuit coupled to the LNA. A first switch couples current from the resonant circuit to a first capacitor integrating a first voltage, wherein the first switch is enabled with a clock signal. A second switch couples current from the resonant circuit to a second capacitor integrating a second voltage, wherein the second switch is enabled with an inverse clock signal. A differential amplifier comprises a positive input for receiving the first voltage and a negative input for receiving the second voltage in order to produce a sum and a difference frequency spectrum between a signal spectrum carried within the current and a frequency of the clock signal.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: May 1, 2018
    Assignee: Tensorcom, Inc.
    Inventor: Zaw Soe
  • Patent number: 9960818
    Abstract: A near field communication circuit includes an antenna, a circuit logic unit coupled to the antenna, an energy storage coupled to the antenna, and a shunt control circuit, coupled to the antenna, for controlling a first operating voltage provided for the circuit logic unit by the antenna. The circuit logic unit is set up such that in a first mode of operation the circuit logic unit is operated by the first operating voltage provided by the antenna. The circuit logic unit is set up to control the shunt control circuit such that in the first mode of operation at least some of the electric power provided by the antenna is supplied to the energy storage for the purpose of charging same with the electric power.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: May 1, 2018
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Thomas Leutgeb, Franz Michael Darrer, Gerald Holweg
  • Patent number: 9924522
    Abstract: A method for selecting the state of a reconfigurable antenna installed at either the receiver or transmitter of a communication system is provided. The proposed method uses online learning algorithm based on the theory of multi-armed bandit to perform antenna state selection. The selection technique utilizes the Post-Processing Signal-to-Noise Ratio (PPSNR) as a reward metric and maximizes the long-term average reward over time. The performance of the learning based selection technique is empirically evaluated using wireless channel data. The data is collected in an indoor environment using a 2×2 MIMO OFDM system employing highly directional metamaterial Reconfigurable Leaky Wave Antennas. The learning based selection technique shows performance improvements in terms of average PPSNR and regret over conventional heuristic policies.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: March 20, 2018
    Assignee: Drexel University
    Inventors: Nikhil Gulati, David Gonzalez, Kapil R. Dandekar
  • Patent number: 9813187
    Abstract: A mobile communications terminal comprising a radio frequency interface configured to operate at least at a first configuration, and a controller, wherein said controller is configured to determine that a reconfiguration of the radio frequency interface is to be performed, determine a timing of the reconfiguration and reconfigure said radio frequency interface to operate at a second configuration at the determined timing, wherein said controller is configured to determine said timing based on the type of reconfiguration to be made.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: November 7, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Fredrik Tillman, Bengt Lindoff, Sven Mattisson, Johan Nilsson, Lars Sundström
  • Patent number: 9749031
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, accessing a group of de-coupling data stored in a memory of a communication device where the group of de-coupling data is mapped to corresponding use cases associated with the communication device, selecting de-coupling data from among the group of de-coupling data according to a determined use case of the communication device, generating a pre-distortion signal according to the selected de-coupling data, combining the pre-distortion signal with RF signals to generate pre-distorted RF signals, and transmitting the pre-distorted RF signals via a multi-port antenna of the communication device. Other embodiments are disclosed.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: August 29, 2017
    Assignee: BLACKBERRY LIMITED
    Inventors: Shirook M. H. Ali, Michael Eoin Buckley, Anmol Bhardwaj
  • Patent number: 9665329
    Abstract: A system-in-a-package including a printed circuit board, a receiver, a processor, a baseband module, an image module and a transmitter. The printed circuit board is configured to be mounted within a printer. The receiver (i) receives a first radio frequency signal wirelessly transmitted to the printer from a network device, and (ii) generates a first baseband signal based on the first radio frequency signal. The processor generates a second baseband signal based on the first baseband signal. The baseband module generates a data signal based on the first baseband signal. The image module processes the data signal to implement physical printing via a print mechanism. The transmitter (i) generates a second radio frequency signal based on the second baseband signal, and (ii) transmits the second radio frequency signal from the system-in-a-package to the network device.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: May 30, 2017
    Assignee: Marvell World Trade Ltd.
    Inventors: Mark D. Montierth, Gary D. Zimmerman
  • Patent number: 9635098
    Abstract: The present invention relates to the technical field of computers. Provided are an open platform, open platform access system, storage medium, and method for allowing a third party application to access an open platform, the method comprising: acquiring the identification information a user uses to access a target open platform; according to the acquired identification information and the corresponding relationship between the pre-established identification information of the user in the target open platform and the identification information in a preset open platform, determining the identification information of the user in the preset open platform; according to the identification information of the user in the preset open platform, invoking via the open interface of the preset open platform the data of the target open platform stored in the preset open platform.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: April 25, 2017
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Nianyang Zhu, Yanping Guan, Dongliang Zhang, Tong Rui, Puguang Huang
  • Patent number: 9564856
    Abstract: An amplifier circuit with improved accuracy is provided that comprises a cascade of amplifier stages, a control line for controlling the amplifier stages, a feedback circuit having an input port for receiving a reference signal, and a feedback loop connecting the feedback circuit to the control line. Via the feedback circuit and the feedback loop, the large signal behavior of the amplifier stage is accurately fixed. As a result, the small signal gain of the amplifier stages has an improved accuracy as well.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: February 7, 2017
    Assignee: Qualcomm Technologies, Inc.
    Inventor: Peter Van Der Cammen
  • Patent number: 9515570
    Abstract: A power conversion system and a method for voltage change detection, specifically, relates to a detection circuit implemented in the AC-DC power converter, detect the voltage change. The AC input voltage is rectified to convert into a DC input voltage transmitted to a detection unit generating a detection voltage signal at different logical states corresponding to the input voltage changes. A charge current source unit is used for charging the capacitor when the detection voltage signal is in a second state and a discharge current source unit is used for discharging the capacitor when the detection voltage signal is in a first state. A primary comparator compares the voltage changes of the capacitor in the alternating charge and discharge processes with a critical zero potential and outputs a detection signal identifying the changing trend of the input voltage.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: December 6, 2016
    Assignee: Alpha and Omega Semiconductor, Inc.
    Inventors: Yu-Ming Chen, Chih-Yuan Liu, Pei-Lun Huang
  • Patent number: 9503155
    Abstract: An integrated circuit including: an RF input/output; an on-chip digital interface including a plurality of IC pin connections wherein an output current from the on-chip digital interface is split into first and second parallel paths among the plurality of IC pin connections; first and second current sources; and a controller, wherein the controller is configured to determine a plurality of mutual inductances between the plurality of IC pin connections and the RF input/output; calculate a current ratio n based upon the plurality of mutual inductances between a first current driven on the first parallel path and a second current driven on the second parallel path; drive the first current source to produce the first current and the second current source to produce the second current wherein the first and second current have the determined ratio n; and measure a voltage at the RF input/output.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: November 22, 2016
    Assignee: NXP B.V.
    Inventor: Niels Gabriel
  • Patent number: 9350399
    Abstract: A method and apparatus are provided for reducing aliasing in a direct conversion (or zero-IF) radio receiver having high and low frequency paths. According to an implementation, a non-transitory machine-readable memory stores aliasing correlation response data that associates a measured non-aliased signal in a high frequency path and a measured aliased residual of the signal in a low frequency path. A compensator is in communication with the memory to apply aliasing compensation to received signals based on the stored aliasing correlation response data. In an example implementation, the low and high frequency paths are independently optimized for low and high frequency performance, respectively, and have transfer functions that overlap with one another to create a calibration zone used to calibrate the first and second transfer functions.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: May 24, 2016
    Assignee: Microsemi Storage Solutions (U.S.), Inc.
    Inventors: Anthony Eugene Zortea, Mark Hiebert
  • Patent number: 9338668
    Abstract: In a wireless communication system, carrier aggregation may be used to provide desired amounts of bandwidth, where a primary carrier and one or more secondary carriers are aggregated. At the receive side of a system in which the aggregated carriers are in a single frequency band, an amplifier may be used to apply a common gain to the aggregated carriers in the single frequency band, and the common gain may be determined as a function of indications of received signal quality associated with groups of aggregated carriers containing one or more of the aggregated carriers, where one group contains the primary carrier and possible one or more secondary carriers and another group contains only secondary carriers.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: May 10, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Mariam Motamed, Wesley A. Sampson, Alexei Yurievitch Gorokhov, Pengkai Zhao
  • Patent number: 9306792
    Abstract: Methods, systems, and apparatuses for down-converting a modulated carrier signal to a demodulated baseband signal by sampling a portion of the energy of the carrier signal are described herein. Briefly stated, such methods systems, and apparatuses operate by receiving a modulated carrier signal and using a control signal to control a switch or switches so as to transfer a portion of the energy from the modulated carrier signal in the form of charge to a storage capacitor during a plurality of aperture periods and to discharge the charge in the storage capacitor into a load during the time between the plurality of aperture periods. The demodulated baseband signal is generated during both the charging and the discharging of the storage capacitor based on the energy accumulated at the storage capacitor as a net result of previous charging and discharging of the storage capacitor.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: April 5, 2016
    Assignee: ParkerVision, Inc.
    Inventors: David F. Sorrells, Michael J. Bultman, Robert W. Cook, Richard C. Looke, Charley D. Moses, Jr.
  • Patent number: 9219629
    Abstract: Adaptive low complexity minimum mean square error (MMSE) channel estimator for OFDM systems operating over mobile channel. Complexity of the estimator is reduced by partitioning sub-carriers into windows where, window size is optimized by considering channel model mismatch error (MME). Three types of adaptive windowed MMSE (W-MMSE) estimators include: A first type, a simplified delay profile applied as channel reference model, and optimum window size adaptive to the estimated signal-to-noise ratio. A second type, a group of candidate channel reference models are considered. The receiver roughly estimates and selects current reference model from candidate group, then adapts optimum window size based on the estimated SNR and selected channel model. A third type, the current channel statistics are finely estimated and window size is iteratively optimized at receiver.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: December 22, 2015
    Assignee: Zenith Electronics L.L.C.
    Inventors: Ning Sun, Wayne E. Bretl, Nejib Ammar
  • Patent number: 9219529
    Abstract: The disclosed communication system, information recording medium, and relay communication device allow communication via electromagnetic induction, allow the use of low-cost information recording media, improve communication stability when information recording media is misaligned or rotated, and provide high IC-chip tolerance to flexion in information recording media. An information recording medium (3-1) has: an IC chip (32-1) that is capable of communication via electromagnetic induction; and a pair of thin conductive sheets (21-1) connected to the IC chip (32-1). A relay medium (2-1) has thin conductive sheets (31-1) and a loop antenna (22-1), with one of said thin conductive sheets (31-1) connected to one end of the loop antenna (22-1) and the other thin conductive sheet (31-1) connected to the other end of the loop antenna (22-1). A read/write device (1-1) has a loop antenna (12-1).
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: December 22, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Akiyama, Kei Ohsugi
  • Patent number: 9210535
    Abstract: This disclosure describes techniques for providing active interference cancellation in a wireless communication system having a Bluetooth transmit chain and a WLAN receive chain. A signal sampled from the Bluetooth transmit chain is gain and phase adjusted to offset interference in the WLAN receive chain. A quadrature phase shifter may be used to generate quadrature components of the sampled signal that are selectively combined to achieve a desired phase adjustment. The phase shifter may be stabilized by a variable capacitor. These techniques may be extended to MIMO systems.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: December 8, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Alireza Kheirkhahi, Shahram Abdollahi-Alibeik, Lalitkumar Nathawad, Ke Gong, Ali Agah
  • Patent number: 9197306
    Abstract: A method, apparatus, and system for transmitting and controlling uplink diversity signals in a mobile communication device. While in a soft handoff situation, a mobile communications device may receive a phase feedback signal from a non-serving base station. The mobile device may calculate a modified phase parameter based on the phase feedback signal from the non-serving base station in order to minimize interference with the non-serving base station, for example, by calculating a modified value of a phase difference in a direction opposite to the direction desired by the non-serving base station. In some embodiments of the invention, the mobile device may determine whether to calculate the modified phase parameter in a direction opposite to the direction indicated by the phase feedback signal of the non-serving base station based on a comparison of power feedback signals received from the non-serving and serving base stations.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: November 24, 2015
    Assignee: Google Inc.
    Inventors: Sherwin J. Wang, Kenneth Kludt, Phil F. Chen, Haim Harel
  • Patent number: 9191831
    Abstract: This disclosure describes techniques for constructing power spectral density (PSD) maps representative of the distribution of radio frequency (RF) power as a function of both frequency and space (geographic location). For example, the disclosure describes techniques for construction PSD maps using non-parametric basis pursuit form of signal expansion.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: November 17, 2015
    Assignees: Regents of the University of Minnesota, NATIONAL SCIENCE FOUNDATION
    Inventors: Georgios B. Giannakis, Juan Andres Bazerque, Gonzalo Mateos
  • Patent number: 9166852
    Abstract: Low noise amplifiers (LNAs) supporting carrier aggregation are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, etc.) includes an amplifier circuit, a transformer, and a plurality of downconverters. The amplifier circuit receives and amplifies an input radio frequency (RF) signal and provides an amplified RF signal. The input RF signal includes transmissions sent on multiple carriers at different frequencies to a wireless device. The transformer includes a primary coil coupled to the amplifier circuit and a plurality of secondary coils providing a plurality of output RF signals. The plurality of downconverters downconvert the plurality of output RF signals with a plurality of local oscillator (LO) signals at different frequencies. Each downconverter includes a pair of mixers that receives one output RF signal and one LO signal and provides inphase and quadrature downconverted signals for one set of carriers being received.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: October 20, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Anosh Bomi Davierwalla, Aleksandar Miodrag Tasic
  • Patent number: 9134718
    Abstract: The present invention discloses a low-power control circuit that comprises a receiver circuit and a control chip, wherein the receiver circuit is signally connected with the control chip, and the control chip is connected with an actuating mechanism. The present invention is characterized in that the low-power control circuit also comprises a clock generator control circuit which is respectively and signally connected with the receiver circuit and the control chip. Because the clock generator control circuit is adopted in the present invention to close the receiver circuit at regular time, the control chip is awakened only when output signal exists in the receiver circuit. Therefore, the control chip is in sleep state (also called standby state) in general.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: September 15, 2015
    Assignee: Shenzhen BOFU Mechanic & Electronic Co., Ltd.
    Inventors: Jinyou Wang, Xuexing Wang
  • Patent number: 9113372
    Abstract: A CA decision part selects a component carrier to be used for communication with a terminal apparatus from component carriers used for communication by a plurality of base station apparatuses. A CA set notification part notifies a sub-base station apparatus of carrier aggregation information indicating the component carrier selected by the CA decision part. A transmission unit of a main base station apparatus allocates a signal, which is obtained by modulating a part of data to be transmitted to the terminal apparatus, on a first component carrier selected by the CA decision part, and transmits the signal. A transmission unit of the sub-base station apparatus allocates a signal, which is obtained by modulating a part of the data to be transmitted to the terminal apparatus, on a second component carrier indicated by notified carrier aggregation information, and transmits the signal.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: August 18, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Toshiaki Kameno, Koichi Tsunekawa, Katsutoshi Ishikura, Yoshio Konno
  • Patent number: 9100259
    Abstract: GI removers b102-nR remove a GI from received signals. FFT units b103-nR apply a time-to-frequency transform to the signals obtained in the GI removers b102-nR. Demapping units b104-nR separate from the obtained frequency-domain signals the received signals of resource elements in which data, a first pilot symbol, and a second pilot symbol were respectively transmitted. Path extractors b105-nR use the first pilot symbol to extract effective paths for estimation. Channel estimators b106-nR compute first CFR estimation values using the second pilot symbol, compute CIR estimation values by using path location information extracted by the path extractors and the first CFR estimation values, and then convert the CIR estimation values into second CFR estimation values.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: August 4, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuya Kato, Takashi Yoshimoto, Ryota Yamada, Kozue Yokomakura
  • Patent number: 9088468
    Abstract: In a dual-carrier, double-conversion Orthogonal Frequency Division Multiplexing (OFDM) receiver a frequency synthesizer generates a first local oscillator signal for the first down-conversions stage of the receiver. A frequency divider is used to derive a second local oscillator signal from the first local oscillator signal, thus eliminating the need for a separate frequency synthesizer for the second down-conversion stage. A controller determines the frequency of the first local oscillator signal and a divisor M to align subcarrier grids for said first and second baseband signals with DC.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: July 21, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Lars Sundström, Magnus Nilsson, Leif Wilhelmsson
  • Patent number: 9049087
    Abstract: A communication device includes: a reception element for receiving a radio signal modulated in a first modulation scheme or a second modulation scheme; a first demodulation element for demodulating the received radio signal in a first demodulation scheme corresponding to the first modulation scheme; a second demodulation element for demodulating the received radio signal in a second demodulation scheme corresponding to the second modulation scheme; and a modulation scheme detection section for detecting a modulation scheme of the received radio signal. The received radio signal includes modulation scheme determination information. The modulation scheme detection section detects the modulation scheme of the received radio signal based on a result of demodulation of the modulation scheme determination information performed by the first demodulation element and a result of demodulation of the modulation scheme determination information performed by the second demodulation element.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: June 2, 2015
    Assignee: MegaChips Corporation
    Inventors: Takashi Matsutani, Shigenori Motooka, Keishi Kajiwara
  • Patent number: 9042820
    Abstract: An optical receiver circuit is disclosed in which a number of electrical signals are processed to extract data encoded therein. The electrical signals may be compared during the process to selectively remove one or more waveforms from one or more corresponding electrical signals. Various data signals, each including one or more waveforms, may then be processed to extract the encoded data. The optical receiver circuit reduces, or eliminates, electrical offsets which may be present in one or more of the electrical signals to reduce corresponding errors in the encoded data signals.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: May 26, 2015
    Assignee: Infinera Corporation
    Inventors: Huan-Shang Tsai, Jeffrey T. Rahn
  • Patent number: 9042833
    Abstract: A proximity detection module determines, using an infrared (IR) sensor of a user device, a distance between an object and the user device. The proximity detection module compares the distance to a distance threshold. If the distance is below the predefined distance threshold, the proximity detection module determines, using a capacitance sensor of the user device, a capacitance value associated with the object. The proximity detection module compares the capacitance value to a predefined presence threshold, and if the capacitance value meets or exceeds the predefined presence threshold, determines that the object comprises a body part of a user.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: May 26, 2015
    Assignee: Amazon Technologies, Inc.
    Inventors: Nagendra Bage Jayaraj, Khaled Ahmad Obeidat, Marshall Williams, Michael M. Lee
  • Patent number: 9025773
    Abstract: The approach shown provides for an efficient implementation of time response, level response and frequency response alignment between two audio sources such as DAB and FM that may be time offset from each other by as much as 2 seconds, and produces an aurally undetectable transition between the sources. Computational load is significantly reduced over the approaches known in the prior art.
    Type: Grant
    Filed: April 21, 2012
    Date of Patent: May 5, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: John Elliott Whitecar, Trudy D. Stetzler
  • Patent number: 9020559
    Abstract: A method for direct sampling of a plurality of radio bands, including a step of receiving a first radio band via a first interface and at least one additional radio band via at least one additional interface, the first radio band and the at least one additional radio band each being associated with different frequency ranges, and the first radio band or the at least one additional radio band being a DAB band. Furthermore, a selection signal is received via an interface, the selection signal indicating whether further processing of the first radio band and/or the at least one additional radio band takes place. Depending on the selection signal, the first radio band is sampled at a common sampling frequency and/or the at least one additional radio band is sampled at the common sampling frequency.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: April 28, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Carsten Lehr, Detlev Nyenhuis, Marcus Risse
  • Patent number: 9014639
    Abstract: The present invention provides methods of notifying a user of a smartphone event through use of an energizable ophthalmic lens. In some embodiments, the smartphone may be paired with a specified ophthalmic lens, wherein the pairing may limit wireless communication to communication between the two specified devices. The smartphone may transmit smartphone event data, which may activate an indicator in the ophthalmic lens. In some embodiments, the user may respond to the notification of the smartphone event. The response may trigger an internal action within the ophthalmic lens, or the response may be transmitted to the smartphone, triggering an action in the smartphone. The present invention further describes a method of using an ophthalmic lens with a smartphone event indicator, including methods of pairing an ophthalmic lens with the specified smartphone.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: April 21, 2015
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Randall Braxton Pugh, Camille A. Higham
  • Patent number: 9002295
    Abstract: A SAW-less receiver includes an FEM interface module, an RF to IF receiver section, and a receiver IF to baseband section. The RF to IF receiver section includes a mixing module, a mixed buffer section, and a frequency translated BPF (FTBPF) circuit module. The mixing module converts an inbound RF signal into an in-phase (I) mixed signal and a quadrature (Q) mixed signal. The mixed buffer section filters and buffers the I mixed signal and filter and buffer the Q mixed signal. The FTBPF circuit module frequency translates a baseband filter response to an IF filter response such that the FTBPF circuit module filters undesired signal components of the IF I signal and the IF Q signal to produce an inbound IF signal. The receiver IF to baseband section converts the inbound IF signal into one or more inbound symbol streams.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: April 7, 2015
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Hooman Darabi
  • Patent number: 8995940
    Abstract: A technique includes receiving data that is communicated in a frame over a wireless network and processing the data through a filter. A response of the filter is changed during the processing.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: March 31, 2015
    Assignee: Silicon Laboratories Inc.
    Inventors: Srihari Adireddy, Brian D. Green
  • Patent number: 8995919
    Abstract: In at least one embodiment, a method includes receiving a first transmission from a device, the first transmission transmitted at a first frequency. In response to receiving the first transmission, a transceiver is disabled and a second transmission is transmitted to the device, the second transmission transmitted at a second frequency. The method further includes receiving a third transmission from the device, the third transmission transmitted at the second frequency.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: March 31, 2015
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Randy Zimler, George B. Bolam, James A. Worsham, Jr.
  • Patent number: 8983421
    Abstract: In an organic memory which is included in a radio chip formed from a thin film, data are written to the organic memory by a signal inputted with a wired connection, and the data is read with a signal by radio transmission. A bit line and a word line which form the organic memory are each selected by a signal which specifies an address generated based on the signal inputted with a wired connection. A voltage is applied to a selected memory element. Thus writing is performed. Reading is performed by a clock signal or the like which are generated from a radio signal.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: March 17, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Toshihiko Saito, Kiyoshi Kato
  • Patent number: 8982974
    Abstract: Receiver synchronization techniques (RST), contributing more accurate synchronization of receiver clock to OFDM composite frame combined with much faster acquisition time and better stability of the receiver clock, and phase and frequency recovery techniques, comprising a software controlled clock synthesizer (SCCS) for high accuracy phase & frequency synthesis producing synchronized low jitter clock from external time referencing signals or time referencing messages wherein SCCS includes a hybrid PLL (HPLL) enabling 1-50,000 frequency multiplication with very low output jitter independent of reference clock quality.
    Type: Grant
    Filed: February 10, 2013
    Date of Patent: March 17, 2015
    Inventor: John W Bogdan
  • Patent number: 8976302
    Abstract: A radio frequency front end for a television band receiver and spectrum sensor includes a low noise amplifier that amplifies a received signal output of a radio frequency antenna connected to the radio frequency front end, a pin diode attenuator circuit that selectively attenuates an output of the low noise amplifier, and a buffer amplifier that amplifies an output of the pin diode attenuator.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: March 10, 2015
    Assignee: Wi-LAN, Inc.
    Inventors: Neil Birkett, Vajira Samarasooriya, Jung Yee
  • Patent number: 8977216
    Abstract: A wireless device is described. The wireless device includes a tunable front end module. The tunable front end module includes a Tx microelectromechanical system bandpass filter. The tunable front end module also includes a first Rx microelectromechanical system bandpass filter. The wireless device also includes a power amplifier. The wireless device further includes a low noise amplifier.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: March 10, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Haim M. Weissman, Avigdor Brillant, David Pezo
  • Patent number: 8977225
    Abstract: A unidirectional sampling mixer utilizes a stepped phase modulation to shift the frequency of an input signal. An RF input signal is supplied to an RF input switch from an RF input port. An ordered set of phase shift values to be applied to the RF input signal and a set of times each element of which correspond to a time at which a phase shift value is be applied to the RF signal are determined. For each phase shift value within the ordered set of phase shift values, a controller controls the RF input switch to select an input of a phase shifting device and controls an RF output switch to select an output of the phasing shifting device. The input of the phase shifting device and the output of the phase shifting device are selected to apply the phase shift value at its corresponding time to the RF input signal. A frequency shifted signal is supplied to an RF output port from an output of the RF output switch.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: March 10, 2015
    Assignee: Invertix Corporation
    Inventors: Brecken H. Uhl, Daniel A. Law
  • Publication number: 20150065198
    Abstract: A continuous-time ??-ADC (1) is disclosed. It comprises a sampled quantizer (5) arranged to generate samples y(n) of a digital output signal of the ??-ADC (1) at sample instants nT, where n is an integer sequence index and T is a sampling period, based on an analog input signal to the quantizer (5). Furthermore, the ??-ADC (1) comprises one or more DACs (10a-b), each arranged to generate an analog feedback signal based on the samples of the digital output signal generated by the sampled quantizer (5). Moreover, the ??-ADC (1) comprises a continuous-time analog network (20) arranged to generate the analog input signal to the quantizer (5) based on the feedback signal(s) from the one or more DACs (10a-b) and an analog input signal to the ??-ADC (1). At least one DAC (10b) of the one or more DACs (10b) comprises two switched-capacitor DACs (40, 50) arranged to operate on the same input but with a mutual delay in time.
    Type: Application
    Filed: October 11, 2012
    Publication date: March 5, 2015
    Inventors: Martin Anderson, Lars Sundström
  • Patent number: 8971836
    Abstract: Disclosed is a method of adjusting the receive frequency of a radio frequency (RF) receiver die (4), the RF receiver die (4) comprising a mixer (8) with an associated local oscillator (10) and a first low-noise amplifier (6) arranged to operate over a first frequency range, the method comprising affixing a second low-noise amplifier (40) arranged to operate over a second frequency range to the RF receiver die (4).
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: March 3, 2015
    Assignee: Telekom Malaysia Berhad
    Inventors: Syahrizal Salleh, Mohamad Faizal Hashim, Zulkalnain Mohd Yussof
  • Patent number: 8971465
    Abstract: A receiver receives a repeating or periodic signal and, based on the signal, estimates a carrier frequency offset for the receiver. Based on the signal and the estimated carrier offset, an I/Q mismatch for the receiver is estimated and compensation for the estimated I/Q mismatch is performed. After compensating for the estimated receiver I/Q mismatch, the carrier frequency offset is re-estimated.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: March 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Nicola Varanese, Christian Pietsch, Juan Montojo
  • Patent number: 8953718
    Abstract: A receiver assembly for the wireless reception of data that are modulated onto a carrier signal includes an analog receiver, an evaluating device and a control device. The control device controls the receiver by means of sampling pulses such that the receiver is activated during the sampling pulses and is ready to receive transmission signals and is deactivated during the sampling pauses. The evaluating device generates a data bit sequence from the received signals that are supplied by the receiver during the sampling pulses. The control device is further designed to actuate the receiver between phases having differing sampling frequency ranges in dependence on at least one predefined switching criterion.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: February 10, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Frank Oehler, Heinrich Milosiu