Transmitter Patents (Class 455/91)
  • Patent number: 10448376
    Abstract: Embodiments of the present invention provide a Physical Uplink Control Channel (PUCCH) configuration method and apparatus. A user equipment (UE) receives correspondence indication information sent by a base station. Additionally, the UE determines, according to a currently-used correspondence, a PUCCH used to send uplink feedback information of a second cell.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: October 15, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bingzhao Li, Wei Quan, Jinhua Miao, Xiaodong Yang, Zhenxing Hu, Jian Zhang
  • Patent number: 10418823
    Abstract: A power transmission system includes: a power transmitter connected to a power supply; a plurality of power receivers respectively connected to a plurality of loads; a power transmission line connecting the power transmitter and the plurality of power receivers; and a controller. The controller acquires information on optimum power for maximizing transmission efficiency in the power transmission line and information on power demands requested by the loads, and routes transmission power from the power transmitter selectively to the plurality of power receivers. The transmission power is equal to or smaller than the optimum power. When a total power demand is larger than the optimum power, the controller requests another controller to supply supplementary power. When the total power demand is smaller than the optimum power, the controller notifies the other controller that surplus power is available.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: September 17, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Junichi Kanou, Masahiro Yamaoka, Akira Minegishi
  • Patent number: 10389179
    Abstract: Described embodiments include a system and method. An antenna is configured to implement at least two selectable radiative electromagnetic field spatial distributions. Each selectable radiative electromagnetic field spatial distributions respectively has a bounding surface that describes a specified power density in the radiative electromagnetic field. A sensor circuit is configured to detect a presence of an object within the bounding surface of an implemented radiative electromagnetic field. A countermeasure circuit is configured to select a response to the detected presence of the object within the bounding surface of the implemented radiative electromagnetic field.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: August 20, 2019
    Assignee: The Invention Science Fund I, LLC
    Inventors: Russell J. Hannigan, Guy Shlomo Lipworth, Matthew S. Reynolds, Yaroslav A. Urzhumov
  • Patent number: 10348475
    Abstract: WTRU-Centric Transmission is disclosed. A WTRU may communicate using a set of WTRU-specific cell IDs (WCIDs). A WTRU may be configured with a WCID and/or set of WCIDs, for example, by a serving cell and/or eNB and/or by autonomous selection. A WTRU may be configured with and/or may use one or more WCIDs, for example, based on a resource, channel, subband, time, subframe, signal type, transmission type, function (e.g. sequence generation), service type, etc. A WTRU may indicate its presence by transmitting a WTRU presence indicator, e.g., to enable a network to send appropriate transmissions using one or more WTRU WCIDs. Resources for measurements and/or reporting, e.g., for channel state information (CSI) processes, may be dynamically controlled. A WTRU may be dynamically reconfigured (e.g. without radio resource control (RRC) transmissions) to adapt WTRU-centric communication to changing sets of cooperating transmission points.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: July 9, 2019
    Assignee: IDAC Holdings, Inc.
    Inventors: J. Patrick Tooher, Paul Marinier
  • Patent number: 10284322
    Abstract: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: May 7, 2019
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hua Xu, Hang Zhang, Mo-Han Fong
  • Patent number: 10243594
    Abstract: The 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: March 19, 2018
    Date of Patent: March 26, 2019
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Farid Shirinfar, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Stephen Wu, Maryam Rofougaran
  • Patent number: 10171364
    Abstract: Various communication systems may benefit from optimized transmissions. A method can include receiving data to be forwarded to a first wireless device. The method can also include determining the data as delay tolerant data. Moreover, the method can include defining a role of at least one second wireless device for forwarding the delay tolerant data. Also, the method can include transmitting the delay tolerant data to the second wireless device to be forwarded to the first wireless device.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: January 1, 2019
    Assignee: Nokia Technologies Oy
    Inventors: Athul Prasad, Jari Petteri Lunden, Martti Johannes Moisio, Mikko Aleksi Uusitalo
  • Patent number: 9984188
    Abstract: A method of forming a mixed mode response from a single ended mode input includes modeling a first voltage controlled current source based on relative values of a vpositive input signal and a vnegative input signal and modeling a second voltage controlled current source based on relative values of the vpositive input signal and the vnegative input signal. A method of forming a single ended mode response from a mixed mode input modeling a first voltage controlled current source based on relative values of a vDIFFin input signal and a vCOMMin input signal and modeling a second voltage controlled current source based on relative values of the vDIFFin input signal and the vCOMMin input signal, the second voltage controlled being connected to ground through a second terminating impedance that is equal to the reference impedance (Z0).
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: May 29, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Zhaoqing Chen
  • Patent number: 9961695
    Abstract: There is provided embodiments relating to scheduling in mobile communications systems, and particularly to scheduling of delay tolerant data in mobile communications systems. A scheduling request relating to conditional data transfer of delay tolerant data is received. The delay tolerant data is scheduled for transmission such that the delay tolerant data is to be transmitted in conjunction with data already scheduled for transmission and utilizing available transmission resources non-utilized for transmission of the data already scheduled for transmission.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: May 1, 2018
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Johan Rune, Ralf Bergqvist, Erik Friman, Lars Westberg
  • Patent number: 9955524
    Abstract: Provided are a communication method of a terminal in a wireless communication system and the terminal using the method. The method comprises: receiving a cell state signal from a small cell; and communicating with the small cell on the basis of the cell state signal, wherein the cell state signal includes information indicating the switching of the small cell to an off-state.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: April 24, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Dongyoun Seo, Joonkui Ahn, Bonghoe Kim, Yunjung Yi, Daesung Hwang, Hyangsun You
  • Patent number: 9929695
    Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: March 27, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
  • Patent number: 9788324
    Abstract: Embodiments of the present invention relate to the field of communications, and disclose a carrier status indication method and a device, which can reduce a delay of indicating an activated state or a deactivated state of a carrier, and improve efficiency of indicating the activated state or deactivated state of the carrier. A specific solution is as follows: determining, by a base station, a carrier status of a carrier, where the carrier status is an activated state or a deactivated state; indicating first carrier information to user equipment by using a downlink physical control channel, where the first carrier information includes the carrier status of the carrier, and the first carrier information is used to enable the user equipment to perform communication on the carrier according to the carrier status. The present invention is applied in a carrier switching process.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: October 10, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhiyu Yan, Sha Ma
  • Patent number: 9706567
    Abstract: The present invention relates to a method for receiving a signal in a wireless communication system and an apparatus for same, and comprises a step of receiving, via a physical downlink control channel, downlink control information including scheduling information for a K number of subframes, wherein K is bigger than 1, the scheduling information is not applied to at least one subframe when the at least one subframe from among the K number of subframes is a special subframe, and wherein the special subframe is at least a subframe configured to a multicast-broadcast single-frequency network (MBSFN), a subframe configured to receive a physical multicast channel (PMCH), a subframe configured so that a positioning reference signal (PRS) is transmitted, or a subframe including a downlink section, a protection section, and an uplink section.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: July 11, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Suckchel Yang, Yunjung Yi, Joonkui Ahn, Dongyoun Seo
  • Patent number: 9553747
    Abstract: A method for inductively coupled communications is described. The method includes applying a high loaded quality factor to a matching network of an active transmitter during an amplitude modulation (AM) high state. The method also includes switching to a low loaded quality factor for the matching network during an AM low state.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: January 24, 2017
    Assignee: QUALCOMM Incorporated
    Inventor: Prasannasarathy Ramakrishnan
  • Patent number: 9401792
    Abstract: A method and apparatus for receiving and transmitting downlink control information in a wireless communication system are disclosed. The method for receiving a downlink control signal by a user equipment (UE) in a wireless communication system includes: receiving an Enhanced Physical Downlink Control Channel (EPDCCH) from a downlink serving base station (BS); and monitoring a plurality of EPDCCH candidates in an EPDCCH set contained in the received EPDCCH, wherein a minimum aggregation level (AL) of the EPDCCH candidates is associated with a downlink (DL) bandwidth of the wireless communication system and downlink control information (DCI) format.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: July 26, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Jihyun Lee, Inkwon Seo, Hanbyul Seo, Seungmin Lee
  • Patent number: 9337966
    Abstract: A method implemented in a mobile communications system is disclosed. The method includes selecting primary component carrier cp for a new user according to a formula, and performing joint secondary CC selection for one or more Long Term Evolution (LTE)-Advanced users and resource scheduling for one or more LTE users and said one or more LTE-Advanced users. Other methods, systems, and apparatuses also are disclosed.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: May 10, 2016
    Assignee: NEC Corporation
    Inventors: Karthikeyan Sundaresan, Sampath Rangarajan
  • Patent number: 9270230
    Abstract: There is disclosed a multi-stage amplifier comprising: a first amplifier stage; a second amplifier stage; a first voltage supply stage arranged to provide a supply voltage to the first amplifier in dependence on an average power of a signal to be amplified; and a second voltage supply stage arranged to provide a supply voltage to the second amplifier in dependence on an instantaneous power of a signal to be amplified.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: February 23, 2016
    Assignee: SNAPTRACK, INC.
    Inventors: Robert Henshaw, Gerard Wimpenny
  • Patent number: 9258834
    Abstract: The present invention discloses a method of mobile terminal internal communications, which belongs to the field of mobile communications. The method comprises: a control signal channel is connected within an application processor module and a baseband processor module, and the control signal channel is composed of a first signal channel, a second signal channel and a feedback channel. A first request signal is sent from the application processor module to the baseband processor module via the first signal channel, and then a feedback is sent from the baseband processor module to the application processor module via the feedback channel. After the feedback is sent to the application processor module, the application processor module starts to send data to the baseband processor module. A second request signal is sent from the baseband processor module to the application processor module, and then the baseband processor module starts to send data to the application processor module.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: February 9, 2016
    Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
    Inventor: Yanxin Sheng
  • Patent number: 9240811
    Abstract: The disclosed invention relates to a transceiver system having a bypass signal path that enables low power consumption. The transceiver system has a plurality of signal paths respectively having a filtering element with a stop band and with a pass band. An antenna switching module (ASM) has a plurality of RF ports and a plurality of switching elements. Respective RF ports are connected to a separate one of the plurality of switching elements that selectively connect the RF port to an antenna port of the ASM. A control unit generates control signals that operate the plurality of switching elements to selectively connect the plurality of signal paths to the antenna port. A filtering response at the antenna port is equal to a combination of the filtering responses of filtering elements within the connected signal paths.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: January 19, 2016
    Assignee: Intel Deutschland GmbH
    Inventors: Niels O. Norholm, Feridoon Jalili
  • Patent number: 9197255
    Abstract: A RF transmitter includes a power amplifier that generates a transmit signal modulated with outbound data for transmission to a remote communication device via an antenna section. A supply voltage to power the power amplifier is adjusted based on an average power tracking signal. A reflected power from the antenna section is measured. The average power tracking signal is adjusted based on the reflected power to compensate for the changes in impedance of the antenna section and to maintain a desired linearity.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: November 24, 2015
    Assignee: Broadcom Corporation
    Inventors: Mohsen Pourkhaatoun, Philippe Riondet, Alireza Tarighat Mehrabani, Vipin Kumar Aggarwal
  • Patent number: 9197175
    Abstract: Embodiments provide systems and methods for producing an envelope tracking (ET) PA supply voltage with minimum headroom relative to the desired RF output signal of the PA. In an embodiment, the PA supply voltage is generated by applying an ET signal to an ET path of the wireless device, and by further applying pre-emphasis to the ET signal to compensate for a frequency response of the ET path. Embodiments operate by estimating the frequency response of the ET path and determining the pre-emphasis based on the estimate of the frequency response of the ET path. In embodiments, the pre-emphasis is applied using a pre-emphasis filter, which may be within or outside of the ET path. Further, the pre-emphasis may be applied to the ET signal in digital or analog form.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: November 24, 2015
    Assignee: Broadcom Corporation
    Inventors: Sriraman Dakshinamurthy, Robert Lorenz
  • Patent number: 9178489
    Abstract: Isolators are disposed such that DC magnetic fields of permanent magnets intensity with each other, and thus, the input impedance of non-reciprocal circuits 3a and 3b (regulating means 3) is reduced. Accordingly, the impedance conversion ratio between the output impedance of amplifying means 2 and the input impedance of the regulating means 3 is reduced to be relatively small. Thus, by simplifying the configuration of matching means 4 disposed between the amplifying means 2 and the regulating means 3, the insertion loss of the matching means 4 can be reduced, thereby enhancing the efficiency of a circuit module 1. Additionally, it is possible to dispose the non-reciprocal circuits 3a and 3b close to each other so that the DC magnetic fields of the permanent magnets can intensity with each other, thereby increasing the design flexibility of the circuit module 1 and accordingly reducing the size of the circuit module 1.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: November 3, 2015
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Syunji Yoshimi, Kenji Saito, Shingo Yanagihara, Yuki Higashide
  • Patent number: 9171922
    Abstract: One illustrative device disclosed herein includes, among other things, an active layer positioned above a layer of insulating material, a fin positioned above the active layer, a gate insulation layer positioned on the active layer and on the fin, a conductive gate structure that is positioned around at least a portion of the fin and above at least a portion of the active layer, wherein the conductive gate structure comprises at least one work function adjusting metal layer positioned on the gate insulation layer, a first channel region defined in the fin under the conductive gate structure, and a second channel region defined in the active layer under the conductive gate structure.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: October 27, 2015
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Hui Zang, Bingwu Liu
  • Patent number: 9130862
    Abstract: An information processing system comprising a communication terminal and an information processing device that allow communication therebetween. The communication terminal includes: a remote controlling part for acquiring an operation screen image, with which the user makes remote operation of the information processing device; and a cloud service connecting part for connecting to a service providing server providing a cloud service over a network, and acquiring a display screen image for using the cloud service from the service providing server in response to user's instruction, thereby causing the acquired display screen image to be displayed on the display part together with the operation screen image. The remote controlling part sends connecting information for connecting to the service providing server to the information processing device.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: September 8, 2015
    Assignee: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hidetaka Iwai, Hiroaki Sugimoto, Shuji Yoneda, Kazuya Anezaki, Takeshi Maekawa
  • Patent number: 9094531
    Abstract: The mobile phone comprising a voice communication implementer, a multiple language displaying implementer, a mobile phone updating implementer which updates a mobile phone battery controller, a mobile phone camera unit controller, a mobile phone microphone controller, a mobile phone speaker controller, a mobile phone vibrator controller, and language data.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: July 28, 2015
    Inventor: Iwao Fujisaki
  • Patent number: 9088206
    Abstract: A power module includes a substrate; a conductive path layer formed on the substrate with a specific pattern as an inductor; a connection layer being formed on the substrate and electrically connected to a first terminal of the inductor; and a first transistor, electrically mounted on the substrate through the connection layer.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 21, 2015
    Inventors: Ho-Yin Yiu, Chien-Hung Liu, Wei-Chung Yang, Bai-Yao Lou
  • Patent number: 9078215
    Abstract: A programmable-current transmit continuous-time filter (TX-CTF) system can be included in a radio frequency (RF) transmitter. The input of the TX-CTF can receive a baseband transmission signal, and the output of the TX-CTF can be provided to an upconversion mixer for conversion to RF for transmission. The TX-CTF includes amplifier circuitry and passive circuitry that together define the filter parameters. The TX-CTF further includes programmable current circuitry that provides a programmable bias current to the amplifier circuitry. The TX-CTF system also includes control logic that receives one or more transmitter control signals and, in response, generates signals that control the bias current provided to the TX-CTF.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: July 7, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Sandeep Louis D'Souza, Bipul Agarwal
  • Patent number: 9071487
    Abstract: Embodiments of the present invention may include power amplifier architectures and systems for use in wireless communication systems. The systems may include a first circuit path for receiving an input signal and decomposing the signal into two vector signals using an out-phasing generator, modifying the vectors based on predetermined value limit, amplifying the vectors using power amplifiers, and combining the vectors to provide an amplified output. The system may include a second circuit path for generating an estimate of an envelope of the input signal and using the envelope to modulate the voltage supplies of the power amplifiers when amplifying the vector signals. The system may also include a feedback path for sending information regarding the envelope of the input signal into the out-phasing generator, which may modify the vector signals in response thereto.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: June 30, 2015
    Assignee: ANALOG DEVICES GLOBAL
    Inventor: Patrick Pratt
  • Patent number: 9059793
    Abstract: Techniques for creating one or more notch frequencies in the power density spectrum of an output voltage generated by switching circuitry. In an aspect, high- and low-side switches are coupled to an output voltage via an inductor. The spectral power of the output voltage at one or more frequencies is estimated, and the estimated spectral power is provided to a switch controller controlling the switches. The switch controller may be configured to switch the switches only in response to detecting that the estimated spectral power at the notch frequency is at a minimum. In certain exemplary aspects, the techniques may be incorporated in an envelope-tracking system, wherein the switching circuitry forms part of a switched-mode power supply (SMPS) supplying low-frequency power to a power amplifier load.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: June 16, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Song S Shi, Lennart Karl-Axel Mathe, Liang Dai
  • Publication number: 20150147985
    Abstract: Described herein are methods and systems capable of generating weighted parameter sets, which can be randomly addressed for dictating a waveform of each pulse to be generated by using a probability distribution function loader to load a memory table with waveform parameter values, wherein the values are loaded according to a weighted probability distribution function. Each value is then randomly addressed in the memory table and/or randomly selected from the memory table by a random number generator and fed into a signal generation circuit for creation of the waveform to be transmitted.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 28, 2015
    Applicant: RAYTHEON COMPANY
    Inventors: Harry B. Marr, Daniel Thompson, Jeffery J. Logan
  • Patent number: 9042835
    Abstract: Measurement handling is of interest in a user equipment (UE) in connected mode, with the UE being configured with multiple downlink component carriers (CCs). The UE evaluates the signal quality of a specific CC of the configured CCs against a configurable threshold to determine the need for neighbor cell measurements. The UE performs neighbor cell measurements if the signal quality of the specific CC is below the configurable threshold. In this way, robust and efficient measurement handling is provided, even though the UE is configured with multiple component carriers.
    Type: Grant
    Filed: December 18, 2010
    Date of Patent: May 26, 2015
    Assignee: OPTIS CELLULAR TECHOLOGY, LLC
    Inventors: Mats Sågfors, Walter Müller
  • Patent number: 9036727
    Abstract: A precoding codebook matrix/vector of length 2L is generated by the selection of two matrices/vectors, each from one of a predetermined set of L×L matrices and multiplying each column of one of the matrices/vectors by a complex coefficient.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: May 19, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Milos Tesanovic, Timothy James Moulsley, Choo Chiap Chiau
  • Patent number: 9020451
    Abstract: A parallel amplifier, a switching supply, and a radio frequency (RF) notch filter are disclosed. The parallel amplifier has a parallel amplifier output, such that the switching supply is coupled to the parallel amplifier output. Further, the RF notch filter is coupled between the parallel amplifier output and a ground. The RF notch filter has a selectable notch frequency, which is based on an RF duplex frequency.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: April 28, 2015
    Assignee: RF Micro Devices, Inc.
    Inventor: Nadim Khlat
  • Patent number: 9020027
    Abstract: An integrated circuit includes: a digitally-controlled power generation stage for converting an input signal to a radio frequency (RF) carrier, the digitally-controlled power generation stage including a plurality of selectable switching devices capable of adjusting an envelope of the RF carrier; and a pulse width modulator (PWM) generator arranged to generate a PWM control signal according to a fractional word and operably coupleable to the plurality of selectable switching devices of the digitally-controlled power generation stage; wherein the PWM generator inputs the PWM control signal to a subset of the plurality of the selectable switching devices such that a PWM signal adjusts the envelope of the RF carrier output from the digitally-controlled power generation stage.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: April 28, 2015
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Robert Bogdan Staszewski, Min Park
  • Patent number: 9020452
    Abstract: The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: April 28, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Brian Baxter, Jason Millard, Roman Zbigniew Arkiszewski, Steven Selby
  • Patent number: 9020458
    Abstract: A passive mixer with channel impedance equalization is disclosed. In an exemplary embodiment, an apparatus includes replica devices configured to generate replica output signals and an error amplifier configured to generate bias signals based on the replica output signals. The bias signals are configured to equalize on-state channel impedances associated with a mixer.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: April 28, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Jeremy Mark Goldblatt
  • Patent number: 9020450
    Abstract: In one embodiment, an apparatus includes a first block configured to decompose an input signal into a positive component and a negative component. The apparatus further includes a second block configured to generate a mixer positive driver component from the positive component and a mixer negative driver component from the negative component and input the mixer positive driver component and the negative driver component into a mixer for a wireless transmitter.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: April 28, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: Paolo Rossi, Enrico Sacchi, Rinaldo Castello
  • Patent number: 9008592
    Abstract: A transmitter includes a power amplifier driver connected with a first transformer and a second transformer. The first transformer is configured for a first band mode and the second transformer is configured for a second band mode. The power amplifier driver drives both the first transformer and the second transformer.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: April 14, 2015
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Hooman Darabi
  • Patent number: 9008036
    Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: April 14, 2015
    Assignee: Apple Inc.
    Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
  • Patent number: 9001680
    Abstract: A method, apparatus and computer program product provide improved detection of overlapping wireless networks. In this regard, the method, apparatus and computer program product may utilize a processor, such as a processor on a wireless access point, to determine one or more parameters for a scan of a wireless network to identify overlapping networks. Wireless stations may utilize the parameters to determine the content of a scan report generated from a scan of the wireless network. The wireless stations may further utilize the parameters to determine which values should be monitored and/or recorded during the scan of the network. The wireless stations may respond to the access point with results corresponding to the parameters requested by the access point, and the access point may use the results to determine channel access parameters for other devices on the network, such as the wireless stations.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: April 7, 2015
    Assignee: Broadcom Corporation
    Inventors: Timo K. Koskela, Anna Pantelidou, Samuli Turtinen, Sami-Jukka Hakola
  • Patent number: 8983405
    Abstract: Various embodiments provide for systems and methods for wireless communications that implement transmitter protection schemes using spatial combining. The protection scheme implemented by some embodiments provides for a number of benefits, including without limitation: hitless protection; constant power monitoring for each wireless channel being utilized; extra gain to wireless signals transmitted; beam steering, beam hopping, and beam alignment capabilities; and varying levels of transmission path protection (e.g., 1+1 protection, or 1+N protection). Additionally, the features of some embodiments may be applied to a variety of wireless communications systems including, for example, microwave wireless systems, cellular phone systems and WiFi systems.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: March 17, 2015
    Assignee: Aviat U.S., Inc.
    Inventors: Ying Shen, David Schafer
  • Patent number: 8983411
    Abstract: A method to control adjustable power levels uses a network of attenuators that includes a fixed attenuation and a variable attenuation. The method adjusts the variable attenuation to approach the fixed attenuation, provides gain to an attenuated signal in an amount proximate to the fixed attenuation to generate a compensated signal, and compares power levels of a non-attenuated signal and the compensated signal to generate a first error signal. The method introduces the fixed attenuation and correspondingly reduces the variable attenuation to maintain a combined attenuation. The combined attenuation generates a modified compensated signal. The method measures a difference between the first power levels of the non-attenuated signal and the modified compensated signal to generate a second error signal, and generates a control signal as function of the first and second error signals to adjust the variable attenuation to reduce an attenuation mismatch introduced between the fixed and variable attenuations.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: March 17, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Dmitriy Rozenblit, Darioush Agahi
  • Patent number: 8982971
    Abstract: A multi-carrier signal is typically comprised of many equidistant sub-carriers. This results in periodicity of spectrum within the bandwidth of such a multi-carrier signal. An unknown multi-carrier signal with equidistant sub-carriers can thus be sensed together with its sub-carrier spacing by finding a discernable local maximum in the cepstrum (Fourier transform of the log spectrum) of the multi-carrier signal.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: March 17, 2015
    Assignee: QRC, Inc.
    Inventors: Sinisa Peric, Thomas F. Callahan, III
  • Patent number: 8976901
    Abstract: A phase shift keying transmitter circuit that includes: a variable frequency conversion stage adapted to receive a first data signal, wherein the variable frequency conversion stage comprises a plurality of frequency modulating elements, wherein the first data signal controls the number of the plurality of frequency modulating elements that are operated so as to control an operating frequency of the variable frequency conversion stage; and an output stage configured to switch between one of two possible outputs, the signals provided by one of the two possible outputs having an opposite polarity to the other, wherein the output stage is configured to receive a second data signal to control the switching between the two possible outputs, wherein the output stage is coupled to the variable frequency conversion stage and wherein the switching between the two possible outputs changes the phase of a signal from the variable frequency conversion stage by 180°.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: March 10, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Shengxi Diao, Yuan Gao, Yuanjin Zheng
  • Patent number: 8977281
    Abstract: In a method for communication by radio afrequency band that is subdivided into a plurality of subbands is used. Subbands are occupied by radio stations for sending signals. Before sending a signal, a radio station carries out a filtering operation by using a filter function and sends the signal on at least one subband. A parameter of the filter function depends on the occupation of at least one subband adjacent to the at least one subband.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: March 10, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jürgen Michel, Bernhard Raaf
  • Patent number: 8976906
    Abstract: A multi-carrier signal is typically comprised of many equidistant sub-carriers. This results in periodicity of spectrum within the bandwidth of such a multi-carrier signal. An unknown multi-carrier signal with equidistant sub-carriers can thus be sensed together with its sub-carrier spacing by finding a discernible local maximum in the cepstrum (Fourier transform of the log spectrum) of the multi-carrier signal.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: March 10, 2015
    Assignee: QRC, Inc.
    Inventors: Sinisa Peric, Thomas F. Callahan, III
  • 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: 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: 8971823
    Abstract: Techniques to enhance the performance in a wireless communication system using segments called subbands and using precoding are shown. According to one aspect, the bandwidth for transmission to an access terminal is constrained to a preferred bandwidth which is less than the bandwidth available for transmission to an access terminal and precoding information related to the subcarriers within the constrained bandwidth is provided to a transmitter. The precoding information related to the subcarriers within a constrained bandwidth provides feedback about the forward link channel properties relative to different subbands and may be fed back on a channel associated with the bandwidth.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: March 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Dhananjay Ashok Gore, Hemanth Sampath, Jibing Wang, Tamer Kadous, Gwendolyn D. Barriac
  • Patent number: 8965280
    Abstract: According to an embodiment, a chip card communication arrangement is provided comprising a matching network and a chip card communication circuit comprising at least one matching network terminal, a receiver coupled to the matching network via the at least one matching network terminal and an active transmitter coupled to the matching network via the at least one matching network terminal.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: February 24, 2015
    Assignee: Infineon Technologies AG
    Inventors: Richard Sbuell, Walter Kargl, Matthias Emsenhuber