With A Common Signal Processing Stage Patents (Class 455/84)
  • Patent number: 10305554
    Abstract: A device that selects a transmission weight by which each of a plurality of signal points is to be multiplied; multiplies a signal corresponding to each of the plurality of signal points by the selected transmission weight; multiplexes the multiplied signals corresponding to each of the plurality of signal points on a same frequency and time resource; and modifies a selection rule corresponding to the transmission weight by which each of the plurality of signal points is to be multiplied.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: May 28, 2019
    Assignee: SONY CORPORATION
    Inventors: Hiroki Matsuda, Ryota Kimura
  • Patent number: 10224974
    Abstract: A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: March 5, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Sean Russell Mercer, Charbel Khawand, Wenkai Zhong
  • Patent number: 10159003
    Abstract: According to one of the exemplary embodiments, the proposed network entry method is applicable to a user equipment and includes: receiving, within an mmWave band, Q scan beams which have Q IDs over M mmWave time units as each mmWave time unit includes a payload region and a BF header region that includes N BSSs with each of the BSSs corresponding to a different one of the Q scan beams, wherein M, N, and Q are integers greater than 1 and M*N=Q; determining a best beam of the UE based on the BSSs of the Q scan beams; determining a best scan beam of the Q scan beams based on the BSSs of the Q scan beams after determining the best beam of the UE; and transmitting, within the mmWave band, a random access preamble (RAP) by using the best beam of the UE.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: December 18, 2018
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Lien Ho, Ren-Jr Chen, Wen-Chiang Chen
  • Patent number: 9595994
    Abstract: Exemplary embodiments are related to antenna tuners. A device may include a transceiver configured to operate in a frequency division duplex (FDD) network. The device may also include an antenna tuner coupled to the transceiver. Further, the device includes a processor configured to tune the antenna tuner for a receive frequency if the device is operating in receive mode and tune the antenna tuner for a transmit frequency if the device is operating in a transmit and receive mode.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: March 14, 2017
    Assignee: QUALCOMM INCORPORATED
    Inventor: Hongbo Yan
  • Patent number: 9559792
    Abstract: An apparatus, and method therefor, relate generally to broadband IQ generation. In this apparatus, related generally to broadband in-phase and quadrature phase (“IQ”) generation, a divider circuit and a polyphase filter circuit are configured for receiving an oscillator output. The polyphase filter circuit is configured for polyphase filtering the oscillator output into a first quadrature output. The divider circuit is configured for dividing the oscillator output into a second quadrature output. A multiplexer circuit is coupled to the divider circuit and the polyphase filter circuit and configured for selecting either the first quadrature output or the second quadrature output as an IQ output based on a bandwidth of the oscillator output.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: January 31, 2017
    Assignee: XILLINX, INC.
    Inventors: Hesam Amir-Aslanzadeh, Parag Upadhyaya
  • Patent number: 9322853
    Abstract: An antenna device of an embodiment includes: an antenna; a variable impedance matching circuit that is connected to the antenna; a probe that receives power from the antenna; a power detector that is connected to the probe; a control circuit controlling the variable impedance matching circuit based on a value of power measured by the power detector; a first arithmetic circuit calculating a variation in the value of power measured by the power detector; a comparator circuit that compares the variation with a predetermined numerical value range; and a starter circuit that activates the control circuit based on a result of the comparison performed by the comparator circuit.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: April 26, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Higaki, Shuichi Obayashi
  • Patent number: 9252492
    Abstract: The disclosed invention relates to an antenna configuration that is configured to tune the frequency of transmission without using filters. The antenna configuration comprises a tunable multi-feed antenna configured to wirelessly transmit electromagnetic radiation. A signal generator is configured to generate a plurality of signals that collectively correspond to a signal to be transmitted. The plurality of signals have a phase shift or amplitude difference therebetween. The plurality of signals are provided to a plurality of antenna feeds connected to different spatial locations of the tunable multi-feed antenna. The values of the phase shift and/or amplitude difference define an antenna reflection coefficient that controls the frequency characteristics that the tunable multi-feed antenna operates at, such that by varying the phase shift and or amplitude difference, the frequency characteristics can be selectively adjusted.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: February 2, 2016
    Assignee: Intel Deutschland GmbH
    Inventors: Osama Nafeth Alrabadi, Alexandru Daniel Tatomirescu, Mikael Bergholz Knudsen, Gert F. Pedersen, Mauro Pelosi, Samantha Caporal Del Barrio, Poul Olesen, Peter Bundgaard
  • Patent number: 9100986
    Abstract: Cellular processors are cascaded to provide different configurations, which result in higher-capacity base stations, increased numbers of simultaneous users over one frequency band, and/or aggregation of several carriers while still using only one radiofrequency (RF) chipset. The processors are aligned in both time and frequency, with each processor having a data port that allows data exchange with the other processors. The data alignment and exchange allow the processors, in the aggregate, to act as a single unit, resulting in a scalable architecture that can accommodate different system configurations.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: August 4, 2015
    Assignee: BROADCOM CORPORATION
    Inventor: Rafael Carmon
  • Patent number: 9059782
    Abstract: Certain embodiments of the invention may be found in a method and system for antenna and radio front-end topologies for a system-on-a-chip (SOC) device that combines Bluetooth and IEEE 802.11 b/g WLAN technologies. A single chip radio device that supports WLAN and Bluetooth technologies receives a WLAN signal in a WLAN processing circuitry of the radio front-end and in a Bluetooth processing circuitry of the radio front-end. Signals generated by the WLAN processing circuitry and the Bluetooth processing circuitry from the received WLAN signal may be combined in a diversity combiner that utilizes selection diversity gain combining or maximal ratio combining (MRC). When a generated signal is below a threshold value, the signal may be dropped from the combining operation. A single antenna usage model may be utilized with the single chip radio device front-end topology to support WLAN and Bluetooth communications.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: June 16, 2015
    Assignee: Broadcom Corporation
    Inventors: Prasanna Desai, Brima Ibrahim
  • Patent number: 9026060
    Abstract: A bidirectional matching network is disclosed. In an exemplary embodiment, an apparatus includes a first matching circuit connected in a first signal path between a node and a first amplifier, the first matching circuit configured to translate an off-state impedance of the first amplifier to a first translated off-state impedance. The apparatus also includes a second matching circuit connected in a second signal path between the node and a second amplifier. The second matching circuit configured to translate an off-state impedance of the second amplifier to a second translated off-state impedance. The second translated off-state impedance is configured to reduce power loss associated with a first signal flowing in the first signal path and the first translated off-state impedance is configured to reduce power loss associated with a second signal flowing in the second signal path.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 5, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Danial Ehyaie, Mazhareddin Taghivand
  • Patent number: 9020018
    Abstract: A calibration system may be provided for calibrating wireless communications circuitry in an electronic device during manufacturing. The calibration system may include data acquisition equipment and calibration computing equipment for receiving and processing test and calibration signals from wireless communications circuitry to be calibrated. During testing and calibration operations, a device may be provided with initial pre-distortion calibration values. The initial pre-distortion calibration values may be generated at least in part based on calibration operations performed for other wireless electronic devices. The device may generate a test signal using the initial pre-distortion calibration values. The calibration system may determine whether the test signal is within an acceptable range of a known reference signal.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: April 28, 2015
    Assignee: Apple Inc.
    Inventors: Gary Lang Do, David A. Donovan, Gurusubrahmaniyan Radhakrishnan
  • Publication number: 20150087245
    Abstract: A single hybrid receiver is provided for processing both single carrier and carrier aggregated (CA) communications signals where carriers are split into independent receive paths without any additional external components. The receiver receives all contiguous and non-contiguous intra-band CA and inter-band CA signals allowing for improved rejection and balanced rejection of jamming signals on either side of the two carrier signals.
    Type: Application
    Filed: October 30, 2013
    Publication date: March 26, 2015
    Inventors: Amir Hadji-Abdolhamid, Bernd Pregardier, Masoud Kahrizi
  • Publication number: 20150087248
    Abstract: Aspects of the present disclosure provide a radio frequency (RF) system that may be implemented in a variety of devices. For example, the RF system may include a plurality of first RF-modules, each configured to process RF signals received from a corresponding antenna array to generate intermediate frequency (IF) signals and to process IF signals for transmission via the antenna array, wherein the plurality of first RF modules are coupled to each other via a first interface comprising transmission lines for carrying at least an IF signal, a local oscillator (LO) signal, and a control signals; at least one second RF module; and a baseband module configured to provide IF signals, the LO signal, and the control signals to one of the first RF modules via a second interface and to provide at least IF signals to the second RF module via a third interface.
    Type: Application
    Filed: September 22, 2014
    Publication date: March 26, 2015
    Inventor: Alon YEHEZKELY
  • Patent number: 8989679
    Abstract: A circuit for amplifying radio frequency signals comprising: a terminal for connection to an antenna; a common amplifier arranged in a common-gate configuration between a first node and said terminal; a transmit amplifier operable to amplify a radio frequency signal present at an input node and provide the amplified signal to said first node; and a receive amplifier operable to amplify a radio frequency signal present at said first node and provide the amplified signal to an output node; wherein the circuit is operable in two modes: in a receive mode, the common and receive amplifiers being configured so as to together form a receive cascode for amplifying radio frequency signals received at the terminal; and in a transmit mode, the common and transmit amplifiers being configured so as to together form a transmit cascode for amplifying radio frequency signals applied at the input node.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: March 24, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Sever Cercelaru
  • Patent number: 8977283
    Abstract: Techniques for efficient signaling to and from a plurality of mobile stations are disclosed. In one embodiment, a subset of mobile stations may be allocated a portion of the shared resource with one or more individual access grants, another subset may be allocated a portion of the shared resource with a single common grant, and yet another subset may be allowed to use a portion of the shared resource without any grant. In another embodiment, an acknowledge and continue command is used to extend all or a subset of the previous grants without the need for additional requests and grants, and their associated overhead. In one embodiment, a traffic to pilot ratio (T/P) is used to allocate a portion of the shared resource, allowing a mobile station flexibility in selecting its transmission format based on T/P.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: March 10, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Tao Chen, Edward G. Tiedemann, Jr., Avinash Jain
  • Publication number: 20150056934
    Abstract: Digital control of a crystal oscillator is implemented in a manner that allows frequency accuracy to be traded off dynamically with power consumption. The oscillator transitions between a less accurate/lower power mode and a high accuracy/higher power mode smoothly without requiring any external clock source during the transition. Power consumption is optimized because the crystal oscillator provides the clock source during transitions between the power modes and no other clock source is needed for these transitions. The system can also optimize the startup time and steady state power consumption independently.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 26, 2015
    Inventors: Danielle Griffith, Viral Parikh, Ryan Smith, Per Torstein Roine
  • Patent number: 8965305
    Abstract: The input interface for a transmit/receive radio station includes an input for receiving a signal either with a variable voltage over a pre-determined voltage range, or an open collector signal having a voltage (0V) corresponding to the low logic state; a first output for the variable voltage signal, and a second open collector output. The first and second outputs are connected to the same input and the input is connected to a reference potential through a first voltage divider bridge, the middle point of which is connected to the positive terminal of an open loop comparator, the output of which is connected to the second output.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: February 24, 2015
    Assignee: Thales
    Inventors: Sébastien Geairon, Franck Trecul, Pierre Saint-Ellier
  • Publication number: 20150031316
    Abstract: Monitoring non-supported wireless spectrum within a coverage area of a distributed antenna system (DAS) in which a listening module connected to a remote unit of the DAS monitors non-supported wireless frequencies (i.e., frequencies that are outside the frequency ranges supported by the downlink and uplink signals of the DAS), via one or more antennas. The listening module also transmits the wireless frequencies to a monitoring module connected to head end equipment (HEE) of the DAS. In that manner, a monitoring module can use an existing DAS infrastructure to monitor non-supported portions of the wireless spectrum at remote locations. In addition to avoiding the need to run a parallel DAS infrastructure, the disclosed arrangements are also useful in shared spectrum environments and other environments where efficient spectrum utilization is desired.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Applicant: Corning MobileAccess Ltd
    Inventors: Igor Berlin, Liav Moshe Daniel, Yoni Henia, Rami Reuven, Motti Yakobi
  • Patent number: 8938204
    Abstract: The disclosed signal generator circuit has a four-phase signal generator circuit generating four-phase signals with a first frequency; an eight-phase signal generator circuit performing ½ frequency division of the four-phase signals to generate eight-phase signals with a second frequency; a first to a fourth harmonic rejection mixer circuits multiplying a first four-phase signal and a second four-phase signal of the four-phase signals by a first to a third eight-phase signals and a third to a fifth eight-phase signals of the eight-phase signals with mutually different combinations; a subtractor subtracting between outputs of the first and the fourth harmonic rejection mixer circuits to generate a first output signal with a third frequency; and an adder adding between outputs of the second and the third harmonic rejection mixer circuits to generate a second output signal with a third frequency whose phase is different from the first output signal by ?/2.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: January 20, 2015
    Assignee: Fujitsu Limited
    Inventor: Kazuaki Oishi
  • Patent number: 8929837
    Abstract: The signal processing system includes a first signal processing unit, a first route, and a second route. The first signal processing unit receives a first signal and generates a first sub-signal and a second sub-signal. The first route receives the first sub-signal through one end of the first route and outputs the first sub-signal from the other end. The second route receives the first signal transmitted from the antenna through one end of the second route, and outputs the first signal through the other end. The second route includes a second signal processing unit, receives the first signal and generates a third sub-signal and a fourth sub-signal; a gain unit receives the third sub-signal to gain the first signal; and a circuit unit receives the fourth sub-signal, determines whether to enable the gain unit, or to adjust a gain level of the gain unit.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: January 6, 2015
    Assignee: Getac Technology Corporation
    Inventor: Yen-Ching Lee
  • Patent number: 8914068
    Abstract: An array antenna apparatus in which an SN ratio is improved. Antenna elements having transmission modules, respectively, are arranged in plurality, wherein the plurality of transmission modules respectively have transmission signal generators that each output a transmission intermediate frequency signal, local oscillation signal generators that each output a local oscillation signal, and transmission mixers that each mix the transmission intermediate frequency signal and the local oscillation signal with each other, thereby to carry out frequency conversion to a transmission high frequency signal. A reference signal source inputs a reference signal to the transmission signal generators and the local oscillation signal generators. The transmission intermediate frequency signal and the local oscillation signal are synchronized with each other by the reference signal.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 16, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryoji Hayashi, Yoshihito Hirano, Kiyohide Sakai, Mitsuhiro Shimozawa, Akira Inoue, Morishige Hieda, Hiroyuki Joba, Kenichi Tajima, Yoshinori Takahashi, Kazutomi Mori, Tomohiro Akiyama
  • Publication number: 20140364072
    Abstract: A multi-band multi-path receiving and transmitting device and method are provided. The multi-band multi-path receiving and transmitting device includes at least two multi-frequency couplers, a multi-band transceiver, and a signal processing module. The multi-band transceiver includes at least two first frequency band receiving branches and at least two second frequency band receiving branches, and the multi-band transceiver is adopted to decrease the number of the transceivers, thereby reducing the material cost and the mounting cost of the base station system.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Inventors: Wangjun Wu, Yulin Li, Fengqing Yan, Xiaodong Zhang, Xiwen Zhang
  • Patent number: 8909132
    Abstract: According to some embodiments described herein, a bi-directional amplifier may include a first interface port configured to receive a first signal. The bi-directional amplifier may also include a second interface port. The second interface port may be communicatively coupled to the first interface port and may be configured to receive a second signal. The second interface port may be communicatively coupled to the first interface port such that the first signal propagates from the first interface port to the second interface port and such that the second signal propagates from the second interface port to the first interface port. The bi-directional amplifier may also include a common amplifier communicatively coupled between the first interface port and the second interface port such that the common amplifier is configured to receive and amplify both the first signal and the second signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 9, 2014
    Assignee: Wilson Electronics, LLC
    Inventors: Christopher K. Ashworth, James W. Wilson, Patrick L. Cook, James Colin Clark
  • Publication number: 20140357202
    Abstract: A radio-frequency identification (RFID) reader having fast-adaptive echo cancellation for backscatter-modulated signals is described. The echo cancellation includes subtracting an RF-level cancel signal from the received signal, where the cancel signal is generated based upon an error measured in the receive signal after down-conversion to baseband and low-pass filtering. The cancel signal is based upon a cumulative sum or integral of error signals and an estimated complex-valued transfer function of the scaling circuit. Methods of quick calibration of the reader are described, including accounting for circuit offsets and determining the estimated complex-valued transfer function.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 4, 2014
    Applicant: Kapsch TrafficCom AG
    Inventor: Alastair Malarky
  • Patent number: 8897719
    Abstract: A method and apparatus for initializing a transceiver in a wireless communication system.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 25, 2014
    Assignee: Sibeam, Inc.
    Inventors: In Sung Cho, Kumar Mahesh, Prakash Kamath, Jeffrey Gilbert, Rob Frizzell
  • Patent number: 8897343
    Abstract: A diversity receiver comprises a plurality of receiving paths connected to a receiver circuit. Each of the receiving paths comprises an antenna receiving a signal, connected to a matching network connected to a receive amplifier. The receiver circuit is connected to a signal level comparison circuit for providing a relative comparison value indicating one of the receiving paths receiving the signal with a relative maximum strength. The signal level comparison circuit comprises a comparator circuit connected to the receiver circuit receiving a currently received signal level, and to a logic control unit being arranged to select one of the receive paths to provide the currently received signal to the receiver circuit.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: November 25, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Laurent Gauthier
  • Patent number: 8885692
    Abstract: Embodiments of the present invention provide an apparatus comprising a transceiver having a receiver and a transmitter connected through a segment of a calibration loop back path. The apparatus also comprises a control system configured to communicate with the transceiver. The calibration loop back path has an intentional phase shift that can be toggled between an off state and an on state by the control system. The control system is configured to calculate the intentional phase shift by examining the difference of a first and second phase angle. The first phase angle is obtained from the transmission of a first pair of signals with the intentional phase shift in the off state. The second phase angle is obtained from the transmission of a second pair of signals with the intentional phase shift in the on state.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: November 11, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: Yann Ly-Gagnon
  • Patent number: 8867591
    Abstract: A discrete digital transceiver includes a receiver sample and hold module, a discrete digital receiver conversion module, a transmitter sample and hold module, a discrete digital transmitter conversion module, clock generation module, and a processing module. The receiver sample and hold module samples and holds an inbound wireless signal in accordance with a receiver S&H clock signal. The discrete digital receiver conversion module converts the receiver frequency domain sample pulse train into an inbound baseband signal. The transmitter sample and hold module samples and holds an outbound signal to produce a transmitter frequency domain sample pulse train. The discrete digital transmitter conversion module converts a transmitter frequency domain sample pulse train into the outbound wireless signal. The clock generation module generates S&H clock signals in accordance with a control signal. The processing module generates the control signal such that the S&H clock signals are shifted.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: October 21, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Hooman Darabi
  • Patent number: 8849347
    Abstract: Frequency conversion methods and systems are disclosed for a transceiver for personal area networks (PAN) and near field communication (NFC). NFC data may be received and/or transmitted via the NFC radio and PAN data may be received and/or transmitted via the PAN radio. With an integration of frequency conversion for PAN and NFC, both systems may operate from a single frequency source, thereby reducing part count and power consumption. Communication between PAN and NFC channels may be enabled via a single chip.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: September 30, 2014
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8805289
    Abstract: A standing wave ratio measuring circuit includes an amplifier circuit amplifying a transmission signal; a first circulator outputting the transmission signal amplified in a direction of an antenna, and outputting a reception signal received by the antenna to a reception system; a traveling wave bypassing unit allowing the transmission signal (the traveling wave), before being input to the amplifier circuit, to travel to the reception system while bypassing the amplifier circuit when a request to measure a standing wave ratio is detected; a second circulator outputting the traveling wave bypassing the amplifier circuit in a direction of the first circulator; a control unit controlling the amplifier circuit; a reflected wave acquiring unit acquiring a reflected wave at a location after the second circulator in the reception system; and a measuring circuit measuring the standing wave ratio using the traveling wave and the reflected wave.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: August 12, 2014
    Assignee: Fujitsu Limited
    Inventor: Masahiro Kasai
  • Patent number: 8781410
    Abstract: According to one embodiment, a buffer circuit has a capacitor comprising a first terminal and a second terminal, an input signal being inputted to the first terminal, a first inverting amplifier circuit configured to invert and amplify a signal of the second terminal of the capacitor, a second inverting amplifier circuit configure to invert and amplify an output signal of the first inverting amplifier circuit, and a MOS (Metal Oxide Semiconductor) transistor comprising a third terminal, a fourth terminal and a gate, the third terminal being connected to the second terminal of the capacitor, the fourth terminal being connected to a connection node of the first and the second inverting amplifier circuits, an inversion signal of the input signal being inputted to the gate.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: July 15, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Jun Deguchi
  • Patent number: 8773107
    Abstract: A method and apparatus configured to detect electromagnetic field events are disclosed. One apparatus includes an antenna and a circuit electrically connected to the antenna. The circuit includes electronics communicatively connected to the antenna via a direct current isolation circuit and an equalizer compensating for the differentiating frequency response of the antenna. The circuit also includes a logarithmic amplifier electrically connected to the equalizer and configured to generate a range of signals based on signals received at the antenna. The circuit further includes a peak detector receiving signals from the equalizer and configured to capture a peak value of the signals. The electromagnetic field event is detected at least in part based on the peak signal value.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: July 8, 2014
    Assignee: Emprimus, LLC
    Inventors: David Blake Jackson, Greg Fuchs, Frederick R. Faxvog, Terrence R. Noe
  • Patent number: 8774731
    Abstract: There is provided an apparatus for a satellite communication system comprising: a processor to determine at least one out of a phase offset for a frequency channel of a plurality of frequency channels demultiplexed from a carrier to compensate for group delay variation within the carrier and a gain offset for the frequency channel to compensate for gain variation within the carrier, wherein the processor is further configured to apply the at least one out of the determined phase offset and gain offset to the frequency channel before the carrier is reformed from said plurality of frequency channels. The invention therefore provides a way of digitally compensating for any undesired gain and group delay introduced by, for example, analogue components such as filters in the satellite communication system.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: July 8, 2014
    Assignee: Astrium Limited
    Inventors: Stephen Phillip Brown, Anthony Duncan Craig, Robert Julian Francis Hughes
  • Publication number: 20140134964
    Abstract: Cellular processors are cascaded to provide different configurations, which result in higher-capacity base stations, increased numbers of simultaneous users over one frequency band, and/or aggregation of several carriers while still using only one radiofrequency (RF) chipset. The processors are aligned in both time and frequency, with each processor having a data port that allows data exchange with the other processors. The data alignment and exchange allow the processors, in the aggregate, to act as a single unit, resulting in a scalable architecture that can accommodate different system configurations.
    Type: Application
    Filed: January 16, 2014
    Publication date: May 15, 2014
    Applicant: BROADCOM CORPORATION
    Inventor: Rafael Carmon
  • Publication number: 20140128010
    Abstract: A front end device includes an upper-level device and a lower-level device. The upper-level device includes an S/P interface unit. The lower-level device includes a parallel interface unit and a high-frequency processor. The S/P interface unit is connected to an RFIC and the parallel interface unit, receives a serial signal from the RFIC, converts the serial signal into a parallel signal, and transmits the parallel signal to the parallel interface unit. The parallel interface unit receives the parallel signal and supplies the parallel signal to the high-frequency processor. The high-frequency processor is connected between the RFIC and an antenna and performs certain processing on a high-frequency signal based on the parallel signal.
    Type: Application
    Filed: August 29, 2013
    Publication date: May 8, 2014
    Applicant: Murata Manufacturing Co., Ltd.
    Inventor: Ryangsu KIM
  • Publication number: 20140113576
    Abstract: A preferred embodiment of the present invention relates generally to enhancing quality of a received signal in a receiver. The received signal can be enhanced by reducing phase noise. A described method starts with determining input information, wherein the input information comprises at least one of the following pieces of information: a modulation-and-coding scheme of the received signal, a multiple-antenna configuration (MIMO configuration), a signal quality estimate of the received signal, or a frequency separation between the received signal and a transmitted signal. The method continues with selecting a bandwidth value on the basis of the input information. The selecting should result in such a bandwidth value which has an advantageous effect to the quality of the received signal. This advantageous effect is achieved by performing the following: using the bandwidth value for generating a local oscillator signal, and shaping the received signal with the local oscillator signal.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 24, 2014
    Applicant: Renesas Mobile Corporation
    Inventors: Markus NENTWIG, Liangge XU
  • Patent number: 8706045
    Abstract: A signal detection apparatus includes: a unit configured to select a particular detection target signal from among plural candidates of detection target signals; a unit configured to calculate a cyclic autocorrelation value at a center coordinate point specified by at least a cyclic parameter and a shift parameter of the particular detection target signal; a unit configured to calculate a cyclic autocorrelation value of each of (L?1) coordinate points belonging to a common area that is used commonly for different detection target signals; a unit configured to calculate a test statistic of the particular detection target signal; and a unit configured to determine presence or absence of the particular detection target signal according to a comparison result between the test statistic and a threshold, wherein the test statistic is calculated by using the cyclic autocorrelation value in each of the (L?1) coordinate points belonging to the common area.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: April 22, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroki Harada, Hiromasa Fujii, Shunji Miura
  • Patent number: 8693959
    Abstract: A system for transmitting and receiving data is provided. The system includes a direct-conversion receiver that receives a signal modulated on a carrier frequency signal. The direct-conversion receiver includes one or more subharmonic local oscillator mixers. A local oscillator is connected to the direct conversion receiver, and generates a signal having a frequency equal to a subharmonic of the carrier frequency signal. A transmitter is connected to the local oscillator, which uses the local oscillator signal to transmit outgoing data.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: April 8, 2014
    Assignee: Intel Corporation
    Inventors: William J. Domino, Scott A. Griffith, Dmitriy Rozenblit
  • Patent number: 8676255
    Abstract: An integrated circuit system is provided for wireless data communication, comprising a set of hardware components and a port for connection to an RF antenna or an RF Front-End-Module, wherein at least a subset of hardware components is arranged for being shared for simultaneous wireless data communication based on a first protocol and a second protocol. Preferably, the first protocol includes a Wi-Fi standard and the second protocol includes a dedicated protocol for wireless audio communication.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: March 18, 2014
    Assignee: Dunti LLC
    Inventors: Dignus-Jan Moelker, Robert Niels Schutten, Juki Wirawan Tantra
  • Patent number: 8666331
    Abstract: Cellular processors are cascaded to provide different configurations, which result in higher-capacity base stations, increased numbers of simultaneous users over one frequency band, and/or aggregation of several carriers while still using only one radio frequency (RF) chipset. The processors are aligned in both time and frequency, with each processor having a data port that allows data exchange with the other processors. The data alignment and exchange allow the processors, in the aggregate, to act as a single unit, resulting in a scalable architecture that can accommodate different system configurations.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: March 4, 2014
    Assignee: Broadcom Corporation
    Inventor: Rafael Carmon
  • Patent number: 8666328
    Abstract: An electronic device has wireless communications circuitry that includes transmitters and receivers. Antenna structures may be coupled to the transmitters and receivers to support radio-frequency signal transmission and radio-frequency signal reception operations. Switching circuitry such as first and second radio-frequency switches may be used to support multiple communications bands of interest. A low band set of transmitters may be associated with the first switch and a high band set of transmitters may be associated with the second switch. The switches can be configured in real time to switch a desired communications band into use. As transmitted signals at frequency f pass through the switches, harmonics at 2f, 3f, and other integral multiples of the transmitted signals may be produced. A diplexer may be interposed between the switching circuitry and the antenna structures that prevents the harmonics from reaching the antenna structures.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: March 4, 2014
    Assignee: Apple Inc.
    Inventors: Louie J. Sanguinetti, Ronald W. Dimpflmaier, Nicholas W. Lum
  • Patent number: 8666326
    Abstract: An RF receiver and an RF transmitter, which are integrated in a single substrate, are operable to share a single reconfigurable filter to perform RF receiver filtering and RF transmitter filtering. The reconfigurable filter is configured to operate as a bandpass filter such as an image rejection bandpass filter for receiving RF signals by the RF receiver. The reconfigurable filter operates as a low pass filter for transmitting RF signals by the RF transmitter. The reconfigurable filter is configured to operate in a RF receiver filtering mode or a RF transmitter filtering mode, respectively. The reconfigurable filter is enabled to share configurable circuit components of the radio transceiver in both the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode. The reconfigurable filter transitions between the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode via reconfiguring the shared configurable circuit components.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: March 4, 2014
    Assignee: Broadcom Corporation
    Inventor: Hung-Ming (Ed) Chien
  • Patent number: 8660604
    Abstract: Frequency conversion methods and systems for a transceiver for Bluetooth and near field communication. NFC data may be received and/or transmitted via the NFC radio and Bluetooth data may be received and/or transmitted via the Bluetooth radio. With an integration of frequency conversion for Bluetooth and NFC, both systems may operate from a single frequency source, thereby reducing part count and power consumption. Communication between Bluetooth and NFC channels may be enabled via a single chip.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: February 25, 2014
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8649736
    Abstract: The invention concerns a test method for a transmitter-receiver circuit. This transmitter-receiver circuit includes an antenna, connected to a processing unit, arranged for receiving signals and converting their frequency. The transmitter-receiver circuit also includes a power amplifier connected to said antenna and arranged for sending transmission signals.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: February 11, 2014
    Assignee: EM Microelectronic-Marin SA
    Inventors: Arthur Descombes, Tindaro Pittorino
  • Patent number: 8639193
    Abstract: A tri-state control mechanism can be implemented for a line driver of a transmitter unit to switch the output impedance of the transmitter unit between a low impedance state in the transmit mode and a high impedance state in the receive mode while minimizing turn-off glitch. It may be determined whether a communication device comprising the transmitter unit is configured in a transmit operating mode or a receive operating mode. If the communication device is configured in the receive operating mode, a first bias voltage can be generated to bias output transistors of the line driver circuit in a sub-threshold state. If the communication device is configured in the transmit operating mode, a second bias voltage can be generated to bias output transistors of the line driver circuit in a saturation state.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: January 28, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Sang-Min Lee, Michael Peter Mack
  • Patent number: 8626380
    Abstract: A control system for a vehicle subsystem (10) comprises a controller (12) arranged to control operation of the subsystem (10), a user input (16) connected to the system controller (12) and arranged to be operated by a user, and a sensor comprising a transmitter (22) associated with user input (16) and a receiver (26) associated with a first user, whereby the controller uses detection of a signal from the transmitter (22) by the receiver (26) to distinguish between operation of the user input (16) by said first user and operation of the user input by a second user.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: January 7, 2014
    Assignee: Jaguar Cars Limited
    Inventors: Julian Styles, Ian Thorpe, Carl Pickering
  • Patent number: 8620226
    Abstract: A method for operating an integrated transceiver, comprising coupling an operating transmitter and an operating receiver within the integrated wideband receiver, inputting a signal into the operating transmitter, performing a first conversion of the signal, wherein the signal is converted into a second signal, transmitting the second signal into the operating receiver, performing a second conversion of the signal, wherein the signal is converted into a third signal, transmitting the third signal into the operating transmitter, and adjusting the operating transmitter.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: December 31, 2013
    Assignee: BlackBerry Limited
    Inventors: Bradley John Morris, Edwin M. Sich
  • Patent number: 8600317
    Abstract: A system for linearization signal processing with context switching comprises a plurality of signal processing units, a storage unit, a feedback channel, and a correlator. The plurality of signal processing units is associated with corresponding input data signals. The storage unit is to store context states associated with input data signals and corresponding feedback signals. The feedback channel is to convey feedback signals from outputs associated with the plurality of signal processing units. The correlator is coupled to the feedback channel and generates respective correcting information to be used by respective signal processing units, wherein a respective correcting information is based upon a context state and a feedback state associated with an input data signal.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: December 3, 2013
    Assignee: Broadcom Corporation
    Inventors: Timothy Ryan, Ravichandran Ramachandran
  • Patent number: 8583058
    Abstract: A wireless device comprising a plurality of chips may be operable to communicate wireless signals via a mesh network comprising a plurality of integrated directional antennas on the plurality of chips. Wireless signals may be communicated between the plurality of the chips and/or with devices external to the wireless device via the mesh network. Beam-formed wireless signals may be communicated via the plurality of integrated directional antennas. The plurality of chips may be integrated on a single package or on a plurality of packages, which may comprise one or more circuit boards. Wireless signals may be communicated with devices external to the single package via the mesh network. The directional antennas may comprise patch antennas and/or dipole antennas.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: November 12, 2013
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8554277
    Abstract: A microwave transmission assembly comprising a combiner comprising first and second input ports and internal and external output a ports; the combiner being adapted to transfer a signal received at microwave frequency f1 at the first input port to the external output port and signals received at other frequencies to the internal output port; the combiner being further adapted to transfer a signal at a microwave frequency f2 at the second input port to the external output port and signals received at the other frequencies to the internal output port; a resistive load connected to the internal output port; and, a power dependent reflective load connected in series with the resistive load, the power dependent reflective load comprising a reactive element, the reactive element comprising an inductive component and a capacitive component and being adapted to resonate at a load frequency; the impedance of the capacitive component being adapted to drop when the incident microwave power received by the power dependen
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: October 8, 2013
    Assignee: Filtronic Wireless Limited
    Inventors: Bosse Franzon, Jan-Erik Lundeberg, Rune Johansson, Torbjorn Lindh, Claudia Muniz Garcia, John David Rhodes