Power Amplifier Patents (Class 375/297)
  • Patent number: 10680559
    Abstract: An envelope tracking (ET) system is provided. The ET amplifies a radio frequency (RF) signal correspond to an amplitude bandwidth exceeding a voltage modulation bandwidth limitation of the ET system. The ET system compresses the amplitude bandwidth to match the voltage modulation bandwidth of the ET system. More specifically, the ET system compresses a predefined voltage waveform, which tracks time-variant amplitudes of a digital form of the RF signal, to generate a modified voltage waveform at a reduced bandwidth. To ensure that signal distortion(s) resulted from the bandwidth compression can be corrected, the ET system nonlinearly modifies predefined amplitude(s) of the predefined voltage waveform to generate modified amplitude(s) of the modified voltage waveform that is never less than the predefined amplitude(s) of the predefined voltage waveform. As such, the ET system can amplify the RF signal with improved linearity and efficiency, without degrading spectral performance of the RF signal.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: June 9, 2020
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Andrew F. Folkmann
  • Patent number: 10659009
    Abstract: Embodiments of methods and systems for attenuator phase compensation are described. In an embodiment, a method for attenuator phase compensation involves determining a phase compensation value for an attenuator based on an attenuation configuration of the attenuator and performing phase compensation according to the phase compensation value to maintain a constant phase response.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: May 19, 2020
    Assignee: NXP B.V.
    Inventors: Gernot Hueber, Ian Thomas Macnamara
  • Patent number: 10659091
    Abstract: A digitally-controlled power amplifier (DPA) includes a radio frequency digital-to-analog converter (RF-DAC) constructed from nonlinearly weighted PA segments, a multiphase RF drive signal generator that drives the PA segments, and overdrive voltage control circuitry. The nonlinear weighting of the PA segments intrinsically compensates for amplitude-code-word dependent amplitude distortion (ACW-AM distortion) involved in the operation of the RF-DAC and the multiphase RF drive signal generator facilitates ACW-dependent phase distortion (ACW-PM distortion) reduction, thus obviating the need for complicated and efficiency-degrading digital predistortion. The overdrive voltage control circuitry is used to fine tune the RF output of the DPA and compensate for other non-idealities and external influences such as process, voltage, temperature (PVT), frequency and/or load impedance variations.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 19, 2020
    Assignee: Technische Universiteit Delft
    Inventors: Mohsen Hashemi, Leonardus Cornelis Nicolaas de Vreede
  • Patent number: 10637415
    Abstract: A linearity improving system and a linearity improving method are provided. The linearity improving system includes a coupler, a downconverter and a transformer. The coupler is configured to couple a part of an input RF signal. The downconverter coupled to the coupler converts the input RF signal to a fundamental frequency and outputs a modulation signal. The transformer coupled to the downconverter adjusts a phase and a power of the modulation signal. After the input RF signal and the modulation signal being adjusted are inputted to an amplifier, the amplifier outputs an output RF signal.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: April 28, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yu-Cheng Liu, Chih-Chun Shen
  • Patent number: 10637712
    Abstract: Included are a first signal exchanger for exchanging a TXI signal and a TXQ signal output from a transmission baseband unit to signal paths and a TX control unit for controlling generation of the TXI signal and the TXQ signal in the transmission baseband unit on the basis of a measurement result of a reception baseband unit before and after exchange of the signals by the first signal exchanger. As a result, a transceiver only needs to have a single local signal generating unit mounted thereon as a local signal generating unit that is an analog circuit.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideyuki Nakamizo, Kenichi Tajima
  • Patent number: 10615754
    Abstract: A method is provided. The method, comprises: power amplifying, with at least two parallel power amplifiers, at least two pre-distorted signals each corresponding to a unique transmit band, wherein each power amplifier operates in a unique transmit band; and pre-distorting, with a single pre-distortion system, at least two signals in different transmit bands, where the pre-distortion of each of the at least two signals is based upon a portion of a corresponding power amplified, pre-distorted signal, and where the pre-distortion diminishes certain IMD products in the corresponding power amplified, pre-distorted signal.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: April 7, 2020
    Assignee: CommScope Technologies LLC
    Inventors: Patrick Braun, Joerg Stefanik, Mohammed Dokni, Peter Schmid, Rainer Friedrich
  • Patent number: 10594270
    Abstract: A supply modulator for a polar power amplifier and method for operating the same are disclosed. An apparatus includes an amplifier having an input for receiving a phase modulated (PM) signal. A modulator is arranged to receive an amplitude modulated (AM) signal and provide a supply voltage to the amplifier, the supply voltage varying based on the AM signal. A detector circuit may detect the supply voltage exceeding a first threshold or falling below a second threshold. The detector circuit includes a current source arranged to provide a bias current to the modulator. When the supply voltage exceeds the first threshold, the detector causes an increase in the bias current provided to the modulator. Similarly, when the supply voltage falls below a second threshold, the detector causes an increase of the bias current supplied to the modulator.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: March 17, 2020
    Assignee: Apple Inc.
    Inventor: Utku Seckin
  • Patent number: 10587315
    Abstract: The present invention relates to a method for multiple-input multiple-output impairment pre-compensation comprising: receiving a multiple-input signal; generating a pre-distorted multiple-input signal from the received multiple-input signal; generating a multiple-output signal by feeding the pre-distorted multiple-input signal into a multiple-input and multiple-output transmitter; estimating impairments generated by the multiple-input and multiple-output transmitter; and adjusting the pre-distorted multiple-input signal to compensate for the estimated impairments. The present invention also relates to a pre-compensator for use with a multiple-input and multiple-output transmitter, comprising: a multiple-input for receiving a multiple-input signal; a matrix of pre-processing cells for generating a pre-distorted multiple-input signal from the received multiple-input signal; and a multiple-output for feeding the pre-distorted multiple-input signal to the multiple-input and multiple-output transmitter.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: March 10, 2020
    Inventor: Fadhel M Ghannouchi
  • Patent number: 10568039
    Abstract: An electronic device supporting beamforming and a method of operating the electronic device are provided. The electronic device includes a first amplifier configured to amplify a first signal and a second amplifier for amplifying a second signal, a power control module configured to generate first power control information based at least on a first attribute of the first signal and generate second power control information based at least on the first power control information and a second attribute of the second signal, and at least one power supply module configured to control power supplied to the first amplifier based at least on the first power control information and control power supplied to the second amplifier based at least on the second power control information.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: February 18, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sungchul Park, Wonjoon Choi
  • Patent number: 10567148
    Abstract: Techniques are disclosed relating to use of digital predistortion in the context of full-duplex radio. In some embodiments, an apparatus includes one or more antennas and is configured to simultaneously transmit and receive wireless signals via at least partially overlapping frequency resources using the one or more antennas. In some embodiments, the apparatus includes receive chain circuitry that is configured to process both wireless signals transmitted by the apparatus via the one or more antennas and over-the-air wireless signals from one or more other computing devices. In some embodiments, the apparatus includes one or more processing elements configured to determine one or more digital predistortion parameters based on the wireless signals transmitted by the apparatus via the one or more antennas and processed by the receive chain circuitry and apply predistortion to transmitted wireless signals based on the one or more digital predistortion parameters.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: February 18, 2020
    Assignee: National Instruments Corporation
    Inventors: James Wesley McCoy, Takao Inoue, Jaeweon Kim
  • Patent number: 10547481
    Abstract: Embodiments of the present disclosure provide a clipping method and an apparatus. The clipping apparatus is a base station, and the base station includes a baseband unit (BBU) and a remote radio unit (RRU). The BBU includes a first processor, and the RRU includes a second processor. The first processor is configured to: perform clipping after combining N input carriers, and output N carriers obtained after a first level of clipping; and the second processor is configured to: perform clipping after combining the N carriers obtained after the first level of clipping, and output N carriers obtained after a second level of clipping, where N is an integer greater than or equal to 2. The base station separately performs clipping at the BBU and the RRU, so that the base station can flexibly select, a baseband processing board or a baseband chip to deploy the first level of clipping.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: January 28, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Jianzhong Yao
  • Patent number: 10536120
    Abstract: The present invention, which relates to a multi-path communication device for sharing a feedback path for digital pre-distortion, includes: a DPD processing unit configured to output a plurality of pre-distorted signals by respectively pre-distorting a plurality of input signals, to output an nth control signal when an nth input signal is input, and to output an nth pre-distorted signal using an nth feedback signal input in response to the nth control signal; a power amplifying unit configured to amplify each of the plurality of pre-distorted signals and output a plurality of amplified signals; a signal combining unit configured to combine some of each of the plurality of amplified signals and output combined feedback signal; and a signal selection unit configured to select and output only the nth feedback signal from the combined feedback signal according to the input nth control signal, thereby preventing an increase in the size of a device and manufacturing cost thereof caused by a plurality of DPD feedbac
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: January 14, 2020
    Assignee: SOLiD, INC.
    Inventors: Kwang Nam Seo, Do Yoon Kim, Hyoung Ho Kim
  • Patent number: 10516423
    Abstract: A polar transmitter provided for transmitting a phase/frequency modulated and amplitude modulated transmit signal and a method for generating a transmit signal using a polar transmitter are described. An example polar transmitter comprises a phase locked loop for generating a phase/frequency modulated precursor of the transmit signal. The phase locked loop comprises at its input a phase error detection unit for detecting a phase error of the precursor fed back from the output of the phase locked loop to the phase error detection unit as a feedback signal. The polar transmitter comprises a digital amplitude modulator for amplitude modulation of the precursor, resulting in the transmit signal. The digital amplitude modulator is arranged within the phase locked loop for amplitude modulation of the precursor before being output by the PLL. The phase error detection unit is further provided for detecting the amplitude of the feedback signal.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: December 24, 2019
    Assignees: IMEC VZW, VRIJE UNIVERSITEIT BRUSSEL
    Inventors: Nereo Markulic, Jan Craninckx
  • Patent number: 10506602
    Abstract: A method and apparatus for adjusting power grants in wireless communications. Multiple power grant tables are stored and one or more tables are designated during communication.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: December 10, 2019
    Assignee: InterDigital Technology Corporation
    Inventors: In H. Kim, Paul Marinier, Eldad M. Zeira, Christopher R. Cave
  • Patent number: 10505570
    Abstract: A distortion compensating device includes: a filter that receives input of a transmitting signal including a plurality of subcarrier signals assigned to respective frequencies and that superimposes filter coefficients on the respective subcarrier signals; a first signal converting unit that converts the subcarrier signals, on which the respective filter coefficients are superimposed, from a frequency domain into a time domain to obtain an input signal; a distortion compensating unit that superimposes a distortion compensation coefficient on the input signal to obtain an output signal; a power amplifier that amplifies and outputs the output signal; and a control unit that generates the filter coefficients according to an arithmetic equation using the subcarrier signals and a feedback signal from the power amplifier, and outputs the filter coefficients to the filter.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: December 10, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Alexander Nikolaevich Lozhkin, Hiroyoshi Ishikawa
  • Patent number: 10491203
    Abstract: A duty cycle corrector includes a delay chain, an edge detector, a falling edge shift (FES) controller, a plurality of falling edge modulator (FEM) cores, and a phase interpolator. The delay chain delays a first clock to generate a delay clock, and generates first and second sampling control signals. The edge detector samples the first clock and a second clock using the first and second sampling control signals to obtain first and second sampling signals. The FES controller determines a modulation direction and a modulation width based on the first and second sampling signals. The plurality of FEM cores first modulate the first edge of the first clock and second modulate the first edge of the delay clock using the modulation direction and the modulation width. The phase interpolator performs phase interpolation on the results of the first and second modulations.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: November 26, 2019
    Assignees: Samsung Electronics Co., Ltd., Research & Business Foundation Sungkyunkwan University
    Inventors: Kyoungtae Kang, Kang Yoon Lee
  • Patent number: 10469179
    Abstract: A distortion compensation apparatus includes: a generation unit that generates a first signal to be used on a transmission side and a feedback side in common; a conversion unit that converts a frequency of a third signal that is to be an even-order distortion compensation signal by using a second signal that is based on the first signal; and a compensation unit that compensates an even-order distortion in a transmission signal caused by amplification by using a signal obtained by frequency conversion for the third signal by the conversion unit.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: November 5, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Tomoya Ota, Toshio Kawasaki
  • Patent number: 10440660
    Abstract: A method and system for identifying passive intermodulation, PIM, at a base station in a wireless communication system are disclosed. In some embodiments, a method includes measuring the noise floor in a radio frequency, RF, channel of an uplink carrier, the uplink carrier comprising a carrier transmitted from a wireless device to the base station. The method includes comparing the measured noise floor to a predetermined noise floor. The method also includes determining whether PIM is present based on a result of the comparison.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: October 8, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Pierre-Andre Laporte, Mark Wyville
  • Patent number: 10382157
    Abstract: An apparatus includes a finite impulse response (FIR) filter to receive a digital signal and a transmitter, operatively coupled to the FIR filter, to transmit an analog signal, converted from the digital signal, to a communication channel. The FIR filer is configured to change at least one operating parameter based on a bandwidth of the analog signal after transmission in the communication channel. The bandwidth of the analog signal is estimated, using an estimator, based at least in part on raw sampling data generated by an analog-to-digital converter (ADC) operatively coupled to the transmitter.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: August 13, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Qiang Wang, Yang Yue
  • Patent number: 10367455
    Abstract: A high-frequency front end circuit includes an antenna terminal, a reception circuit that is directly or indirectly connected to the antenna terminal, and a transmission circuit that is directly or indirectly connected to the antenna terminal, wherein the transmission circuit has an amplification circuit, the amplification circuit includes an input terminal and an output terminal, an amplification element provided on a path connecting the input terminal and the output terminal, and a bias circuit having an LC resonance circuit and connected to between the amplification element and the output terminal. A frequency pass band of the transmission circuit is lower than a frequency pass band of the reception circuit, and a value of a resonant frequency of the bias circuit is smaller than a value of a frequency pass band width of the transmission circuit.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 30, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Isao Takenaka
  • Patent number: 10361730
    Abstract: An amplifier device for high frequency signals, in particular a linear high frequency amplifier device, which comprises at least one input, an incoming line, a pre-distortion unit, in particular an adaptive pre-distortion unit, an amplifier unit, in particular a non-linear power amplifier unit, a transmission line, a feedback unit, and an output. The output is connected to the amplifier unit via the transmission line. In addition, the at least one input is connected to the pre-distortion unit such that two incoming branch lines are provided which are interconnected by a switching unit. A first incoming branch line of the incoming branch lines comprises a down-converter being arranged between the at least one input and the pre-distortion unit.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: July 23, 2019
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Karl-Martin Muessener, Florian Ohnimus, Lothar Schenk
  • Patent number: 10326490
    Abstract: A multi radio access technology (RAT) circuit is provided. The multi RAT power management circuit can concurrently support multiple different RATs using a single power management integrated circuit and a single power amplifier. The multi RAT power management circuit receives a first digital signal modulated based on a first RAT and a second digital signal modulated based on a second RAT. Control circuitry generates a composite output signal, which includes the first digital signal and the second digital signal and corresponds to a time-variant composite signal envelope derived from a respective peak envelope of the first and the second digital signals. The control circuitry generates a voltage control signal having a time-variant target voltage envelope tracking the time-variant composite signal envelope of the composite output signal. As such, the multi RAT power management circuit can concurrently support the multiple different RATs without increasing size, costs, complexity, and/or power consumption.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: June 18, 2019
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Marcus Granger-Jones, Dirk Robert Walter Leipold
  • Patent number: 10312876
    Abstract: Systems and methods for dynamically adjusting transmit gain in a transceiver. The gain is adjusted in order to provide the maximum gain. The amount of distortion is measured. The gain is increased until the distortion reaches a predetermined limit. The gain of several components can be adjusted independently.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: June 4, 2019
    Assignee: Entropic Communications LLC
    Inventor: Branislav Petrovic
  • Patent number: 10291223
    Abstract: An RF signal switch circuit that allows connection of any of N radio frequency (RF) input terminals to a switch output port, either in a low loss mode, in a bypass mode, or, optionally, in a signal function mode. Embodiments of the invention allow for both a single switch in the series input path to a target circuit while still having the ability to isolate the bypass path from the target circuit. In the low loss and bypass mode, the circuit simultaneously exhibits low input insertion loss (and thus a low noise factor) and high bypass mode isolation.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: May 14, 2019
    Assignee: pSemi Corporation
    Inventors: Ethan Prevost, Michael Conry
  • Patent number: 10277291
    Abstract: A MIMO-enabled information handling system may have multiple antennas configured to transmit multiple spatial streams. In some modes, all antennas may be used such as during SU-MIMO communications. In other modes, less than all antennas may be used such as during MU-MIMO communications. When unused MIMO antennas are available during MU-MIMO mode, the elements may be reused for transmitting data for other wireless technologies or spectrums. For example, while transmitting MU-MIMO Wi-Fi data through one spatial stream, Bluetooth data may be simultaneously transmitted through one of the unused Wi-Fi MIMO antennas.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 30, 2019
    Assignee: Dell Products L.P.
    Inventors: Sinem Gulbay, Kamal Joseph Koshy, Andrew Thomas Sultenfuss
  • Patent number: 10181826
    Abstract: Aspects disclosed in the detailed description include an envelope tracking (ET) amplifier circuit. The ET amplifier circuit includes ET tracker circuitry configured to provide an ET modulated voltage, which tracks an ET modulated target voltage, to an amplifier circuit(s) for amplifying a radio frequency (RF) signal. The ET amplifier circuit also includes fast switcher circuitry that is activated to provide an alternate current (AC) current to the amplifier circuit(s) when the RF signal includes a higher number of resource blocks (RBs). However, the fast switcher circuitry and its associated control circuitry may incur a processing delay that can cause the fast switcher circuitry to lag behind the ET modulated target voltage. As such, the ET amplifier circuit further includes timing adjustment circuitry to help compensate for the processing delay, thus helping to maintain efficiency of the ET tracker circuitry for improved performance of the ET amplifier circuit.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: January 15, 2019
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Philippe Gorisse, Jeffrey D. Potts, Michael R. Kay
  • Patent number: 10158511
    Abstract: Systems, methods, and devices for wireless communication are provided. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a processor configured to generate a packet for transmission via a wireless signal. The packet is generated for transmission over a bandwidth of 1 MHz using at least one orthogonal frequency-division multiplexing (OFDM) symbol. The apparatus further includes a transmitter configured to transmit the packet via the wireless signal having unique power spectral density characteristics.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: December 18, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Lin Yang, Youhan Kim, Sameer Vermani, Tevfik Yucek, Hemanth Sampath
  • Patent number: 10153794
    Abstract: A transmitter includes a signal generator arranged to generate a digital baseband signal representative of a signal for transmission; a digital predistortion, DPD, circuit configured to predistort the digital baseband signal; and a power amplifier is arranged to amplify the predistorted signal. The DPD circuit includes a first signal shaping circuit operably coupled to the signal generator and the DPD predistortion circuit and configured to receive the generated digital signal and apply first envelope shaping to shape the predistortion applied to at least the amplitude of the generated digital signal and produce a first DPD signal; a second signal shaping circuit operably coupled to the signal generator and an output of the DPD predistortion circuit and configured to receive and apply the second envelope shaped digital signal to the first DPD signal and produce a second envelope shaped DPD signal.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: December 11, 2018
    Assignee: MediaTek, Inc.
    Inventors: Toru Matsuura, Paul Cheng Po Liang
  • Patent number: 10148295
    Abstract: A semiconductor device (10) includes a transmitting circuit (12) that converts transmission data into a transmission signal with a specified frequency, an amplifier (13) that amplifies a power of the transmission signal, a matching circuit (14) that converts the transmission signal from a balanced signal to an unbalanced signal, and a filter circuit (14) that restricts a frequency band of the transmission signal. The matching circuit includes a primary inductor and a secondary inductor, the filter circuit includes an inductor for a filter, and the primary inductor, the secondary indictor and the inductor for a filter are wound substantially concentrically on one plane.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: December 4, 2018
    Assignee: Renesas Electronics Corporation
    Inventor: Noriaki Matsuno
  • Patent number: 10145729
    Abstract: The present invention related to a new passive wireless sensor platform which is based on the intermodulation communication principle. The platform may utilize a quartz crystal or other mechanical resonator. Additionally, the platform allows for a narrow bandwidth and/or ID-code of a sensor. Certain embodiments enable high frequencies and large read-out distances. It facilitates a generic sensor element and can thus be used to monitor virtually any quantity. Additionally, it offers a means to realize a wireless passive sensor using MEMS sensor technology.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: December 4, 2018
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Ville Viikari, Heikki Seppä
  • Patent number: 10141960
    Abstract: Systems and methods relate to providing a transmit signal. The transmit signal can be provided in a transmitter circuit including a main pre-equalizer, a main power amplifier in communication with the main pre-equalizer, a replica pre-equalizer, and a replica power amplifier in communication with the replica pre-equalizer. The replica preamplifier is in communication with the main pre-equalizer, and control signals are provided to the main pre-equalizer to reduce distortion. The control signals are provided in response to an output signal of the replica power amplifier.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 27, 2018
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Loke K. Tan, Takayuki Hayashi, Lin He, Giuseppe Cusmai, Chun-ying Chen
  • Patent number: 10122397
    Abstract: Circuitry and methods are described for digital signal demodulation. In a configurable receiver, a method includes receiving a radio frequency signal at the configurable receiver, operating the configurable receiver in a first mode, the first mode including providing the radio frequency signal to an amplitude detection circuit to determine an amplitude, providing the radio frequency signal to a phase detection circuit to determine a phase, and providing the amplitude and phase to a coordinate rotation digital computer (CORDIC) logic circuit, and operating the configurable receiver in a low power mode upon receiving an indication to selectively disable the amplitude detection circuit, the low power mode including providing the radio frequency signal to the phase detection circuit to determine the phase, and providing the phase and a predetermined constant value in lieu of the amplitude to the CORDIC logic circuit.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: November 6, 2018
    Assignee: Innophase, Inc.
    Inventors: Yang Xu, Sara Munoz Hermoso
  • Patent number: 10075219
    Abstract: The present disclosure provides system and methods for calibrating a tunable metamaterial device. A sequence of port impedance vectors, (z(m), m), may be generated. Each of the port impedance vectors may be applied to the tunable metamaterial device, and measuring at least one S-parameter. A simulated S-Matrix may be generated by associating each of the port impedance vectors, z(m), with the unknown admittance matrix. The unknown admittance matrix may be solved for by determining a plurality of optimization variables by comparing each of the S-parameters, S(m), to the simulated S-Matrix for each port impedance vector, z(m), and generating an estimated admittance matrix by associating each of the optimization variables with the unknown admittance parameters. The estimated admittance matrix may be used for more accurate radiation patterning.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: September 11, 2018
    Assignee: Elwha LLC
    Inventors: Guy Shlomo Lipworth, Yaroslav A. Urzhumov
  • Patent number: 10069590
    Abstract: An apparatus includes a finite impulse response (FIR) filter to receive a digital signal and a transmitter, operatively coupled to the FIR filter, to transmit an analog signal, converted from the digital signal, to a communication channel. The FIR filer is configured to change at least one operating parameter based on a bandwidth of the analog signal after transmission in the communication channel. The bandwidth of the analog signal is estimated, using an estimator, based at least in part on raw sampling data generated by an analog-to-digital converter (ADC) operatively coupled to the transmitter.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: September 4, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: Qiang Wang, Yang Yue
  • Patent number: 10038449
    Abstract: A temperature compensation circuit includes: an oscillation circuit configured to include a replica amplifier of a target amplifier to be subjected to temperature compensation and oscillate by feeding an output of the replica amplifier back to an input; a time measurement circuit configured to measure a measured rise time taken from a start of oscillation of the oscillation circuit until an amplitude of an oscillation signal reaches a specific amplitude in the oscillation circuit; and a control circuit configured to compare a reference rise time of the oscillation circuit measured under a reference condition and the measured rise time and change a driving condition of the replica amplifier such that the measured rise time becomes substantially equal to the reference rise time.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: July 31, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Yoichi Kawano
  • Patent number: 10033414
    Abstract: A distortion compensation device includes: an odd-order distortion compensation unit that compensates an odd-order distortion occurring at first frequencies used for transmitting an amplified signal, the first frequencies including a plurality of frequencies; and an even-order distortion compensation unit that compensates an even-order distortion occurring at second frequencies different from the first frequencies due to the amplification of the signal, the second frequencies including one or more frequencies.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: July 24, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Tomoya Ota
  • Patent number: 9974041
    Abstract: Methods, medium, systems, and a master node are described involving adjusting a broadcast setting of a node in a wireless node network. In an exemplary method, the master node detects an advertising signal from the node deployed in the network. The master node then establishes an active association with the node, and determines an updated value for the broadcast setting (e.g., a frequency, power level, timing setting) of the node. The updated value may be a value related to a structure (such as building or container) associated with the master node. The method concludes with the master node adjusting the broadcast setting of the node from a current value to the updated value. Such adjusting may take the form of modifying a broadcast profile of the node, where the broadcast profile defines the broadcast setting used when the node communicates with the master node.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 15, 2018
    Assignee: FedEx Corporate Services, Inc.
    Inventor: Ole-Petter Skaaksrud
  • Patent number: 9966918
    Abstract: Systems and methods for dynamically adjusting transmit gain in a transceiver. The gain is adjusted in order to provide the maximum gain. The amount of distortion is measured. The gain is increased until the distortion reaches a predetermined limit. The gain of several components can be adjusted independently.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: May 8, 2018
    Assignee: Maxlinear, Inc.
    Inventor: Branislav Petrovic
  • Patent number: 9960794
    Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications such as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: May 1, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Haim Mendel Weissman, Igor Gutman, Joseph Patrick Burke, Vijay Chellappa, Sumit Verma, Paul Draxler
  • Patent number: 9955435
    Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: April 24, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
  • Patent number: 9935663
    Abstract: The power combiner circuit includes a transformer having a first primary coil coupled to a first power amplifier (PA), a second primary coil coupled to a second PA, and a secondary coil. The secondary coil supplies a current to an antenna based on a first direction of a first phase of a first amplified constant-envelope signal in the first primary coil with respect to a second phase of a second amplified constant-envelope signal in the second primary coil. A first load impedance is associated with the first PA and a second load impedance is associated with the second PA. The first load impedance and the second load impedance receive currents from the first PA and second PA, respectively, based on a second direction of the first phase of the first amplified constant-envelope signal with respect to the second phase of the second amplified constant-envelope signal.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: April 3, 2018
    Assignee: Movandi Corporation
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Farid Shirinfar, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Stephen Wu, Maryam Rofougaran
  • Patent number: 9929758
    Abstract: Computer-implemented methods, computer software, and computer systems for adjusting receiver distortion caused by transmitter signals. A first signal is transmitted by a transmitter of the wireless terminal. A second signal is detected by a receiver of the wireless terminal. The second signal includes distortion caused by at least one of the first signal, a conjugate of the first signal, a harmonic of the first signal, or a conjugate of a harmonic of the first signal. At least one distortion coefficient is estimated in a digital domain based on the first signal and the second signal. Distortion of a third signal received by the receiver of the wireless terminal is adjusted based on the at least one distortion coefficient. Adjustment of distortion can be in the form of reduction, as well as elimination, of the distortion.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: March 27, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Hong Jiang, Wael A. Al-Qaq
  • Patent number: 9917618
    Abstract: Aspects of methods and systems for PAPR reduction in a microwave backhaul outdoor unit are provided.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: March 13, 2018
    Assignee: MAXLINEAR, INC.
    Inventors: Stephane Laurent-Michel, Raghuraman Mariappan
  • Patent number: 9892846
    Abstract: Disclosed is a wireless power transmitter. A wireless power transmitter includes a transmission coil for generating a magnetic field by receiving power from a power source, a transmission resonant coil for transmitting power to a receiving coil by using the magnetic field generated from the transmission coil by using resonance, a detection unit for detecting an approach of the receiving coil and a power regulator for adjusting an output of the power source, which supplies the power, based on the approach of the receiving coil detected by the detection unit.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: February 13, 2018
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Su Ho Bae
  • Patent number: 9893748
    Abstract: An analog predistorter (APD) core module including a radio frequency delay module, an envelope module, and a contact matrix module. The radio frequency delay module is configured to receive a feed-forward radio frequency signal, generate multiple radio frequency delay signals with different delays according to the feed-forward radio frequency signal, and output each radio frequency delay signal to the contact matrix module. The envelope module is configured to receive the feed-forward radio frequency signal, perform envelope detection on the feed-forward radio frequency signal to obtain multiple envelope signals with different delays, and output each envelope signal to the contact matrix module. The contact matrix module is configured to receive each radio frequency delay signal, each envelope signal, and a predistortion coefficient from an exterior source, and generate a predistortion signal according to the predistortion coefficient, each radio frequency delay signal, and each envelope signal.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: February 13, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Siqing Ye, Jinming Wang, Erni Zhu, Chen Wang, Lan You
  • Patent number: 9883511
    Abstract: A transmitter receives channel impulse response signals derived from impulse signals sent from two or more receivers, each impulse signal being sent from one of the receivers to the transmitter through multiple propagation paths. Downlink waveforms for the two or more receivers are calculated in a way so as to increase a weighted sum-rate under a total power constraint, the downlink waveforms being determined based on time-reversed channel impulse response signals and initial virtual uplink power allocation coefficients. Updated virtual uplink power allocation coefficients are determined based on the downlink waveforms, and downlink power allocation coefficients are determined based on the downlink waveforms and the virtual uplink power allocation coefficients.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: January 30, 2018
    Assignee: Origin Wireless, Inc.
    Inventors: Yu-Han Yang, Beibei Wang, K. J. Ray Liu
  • Patent number: 9876515
    Abstract: In one aspect there is provided a method. The method may include sampling an output of a power amplifier, wherein the sampled power amplifier output represents a modulated carrier being transmitted; processing to baseband the sampled power amplifier output; and determining one or more adjustments to the power amplifier, wherein the determined one or more power adjustments are determined based on at least one or more measurements performed on the baseband. Related apparatus, systems, methods, and articles are also described.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: January 23, 2018
    Assignee: Nokia Technologies Oy
    Inventor: Matti Tapani Koskinen
  • Patent number: 9871163
    Abstract: An apparatus for implementing an adaptive sectorization in a DAS (Distributed Antenna System) is provided. In some embodiment of the present disclosure, a DAS that supports an adaptive sectorization has the flexibility of supporting multiple sectors simply with an extension of STM (Sectorization Module) without being affected by the hardware structure. Where no sector splitting is needed, the STM is replaced by a COM (Head-end Combining Module) to provide a simple structure for supporting the sectors.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: January 16, 2018
    Assignees: KMW U.S.A., Inc., SK Telesys Co., Ltd.
    Inventors: Joon Hyong Shim, Jong Ho Park, Dae Ho Woo, Dae Kwang Kim, Myoung Yong Shin, Young Ho Jeon, Bung Chul Kim, Nak Zu E, Bo Yong Bae, Daniel Taeyoon Kim
  • Patent number: 9871574
    Abstract: An antenna is provided and characterized by searching a look-up table for emission angle information according to an incident angle of a radio frequency input signal and driving an antenna array to emit a radio frequency output signal in a direction corresponding to an incident direction of the radio frequency input signal according to the emission angle information.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: January 16, 2018
    Assignee: GETAC TECHNOLOGY CORPORATION
    Inventor: Hung-Tu Chen
  • Patent number: 9867144
    Abstract: Certain aspects relate to methods and apparatus for calibrating transmit error vector magnitude (EVM) using an over-the-air loopback mechanism. An apparatus includes a first radio frequency (RF) module configured to generate first RF signals based on first intermediate frequency (IF) signals and to output the first RF signals via at least a first antenna element, a second RF module configured to process the first RF signals, as obtained via a second antenna element, and to generate second IF signals, and a baseband module configured to determine a transmit performance metric for the first RF module based on the first IF signals and the second IF signals, determine a first transmit power level based on the determined transmit performance metric, and cause the first RF module to output second RF via the first antenna element at the first transmit power level.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: January 9, 2018
    Assignee: QUALCOMM Incorporated
    Inventor: Ziv Golan