With Frequency Conversion Patents (Class 455/20)
  • Patent number: 10222461
    Abstract: A system for ultrasonic imaging utilizing multiple sets of transmit pulses differing in amplitude, frequency, phase, and/or pulse width. One embodiment has phase differences between the k transmit signal as 360 k degrees providing for constructive interference of the kth order harmonic pulse, while an amplitude modulation of each transmit profile is constant between sets. These sets of pulses are transmitted into media of interest and received echoes from these pulses are combined to form an averaged signal. The averaged pulses represent the net common mode signal received from each of the transmit sets. This combined signal set is used to reconstruct an ultrasound image based on broad beam reconstruction methodology.
    Type: Grant
    Filed: October 28, 2007
    Date of Patent: March 5, 2019
    Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
    Inventors: Glen McLaughlin, Ting-Lan Ji
  • Patent number: 10177742
    Abstract: Active feedback is used with two electrodes of a four-electrode capacitive-gap transduced wine-glass disk resonator to enable boosting of an intrinsic resonator Q and to allow independent control of insertion loss across the two other electrodes. Two such Q-boosted resonators configured as parallel micromechanical filters may achieve a tiny 0.001% bandwidth passband centered around 61 MHz with only 2.7 dB of insertion loss, boosting the intrinsic resonator Q from 57,000, to an active Q of 670,000. The split capacitive coupling electrode design removes amplifier feedback from the signal path, allowing independent control of input-output coupling, Q, and frequency. Controllable resonator Q allows creation of narrow channel-select filters with insertion losses lower than otherwise achievable, and allows maximizing the dynamic range of a communication front-end without the need for a variable gain low noise amplifier.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: January 8, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Clark T.-C. Nguyen, Thura Lin Naing, Tristan O. Rocheleau
  • Patent number: 9924374
    Abstract: Embodiments of the present invention disclose a method and an apparatus for transmitting data. The apparatus for transmitting data includes a high frequency radio unit HFRU that is in a communication connection with a site, and a shift frequency radio unit SFRU that is in a communication connection with the HFRU and with a user equipment, where the HFRU includes a high frequency radio unit—indoor device unit HFRU-IDU and a high frequency radio unit—outdoor device unit HFRU-ODU that connects to the HFRU-IDU, and the SFRU includes a high frequency band transceiver and a wireless cellular band transceiver. By converting to-be-transmitted data into intermediate frequency signals for transmission, the method and apparatus for transmitting data according to the embodiments of the present invention can remarkably reduce a data transmission bandwidth, thereby saving bandwidth resources, reducing a data transmission cost, and reducing a device deployment cost.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: March 20, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jueping Wang, Si Zhang, Wei Wang, Yong Wang, Mo Chen
  • Patent number: 9866277
    Abstract: A vehicle wireless hub includes a vehicle power connector that can draw power from a vehicle battery on a vehicle, a first wireless transmission circuit that can send or receive data with base stations in a long-range wireless network, a second wireless transmission circuit that can provide a short-range wireless network and to transfer data to and from electronic devices, and a network processor that can process data in the first wireless transmission circuit and the second wireless transmission circuit. The vehicle power connector can supply power to the first wireless transmission circuit, the second wireless transmission circuit, and the network processor.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: January 9, 2018
    Inventors: Adam James Wang, Zlatko Aurelio Filipovic, Brian Michael Wang
  • Patent number: 9774412
    Abstract: Embodiments of the present invention provide a carrier synchronization method, circuit, and system. The method includes performing n times frequency multiplication on a received signal; performing narrowband filtering at least twice and rectangular wave shaping at least twice on the signal obtained after the n times frequency multiplication; and performing n times frequency division on the signal obtained after the filtering and shaping, to restore a carrier signal. The variable n is a positive integer greater than or equal to 4.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: September 26, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lianfu Liu, Jun Ma
  • Patent number: 9755820
    Abstract: Embodiments of the present invention provide a frequency offset detection method and apparatus. The frequency offset detection method in the present invention includes: calibrating a frequency offset of a clock signal output by a local crystal oscillator of a network element device, and performing frequency offset detection on a tracked reference clock signal by using the calibrated clock signal output by the local crystal oscillator. The embodiments of the present invention solve a problem in the prior art that a detection result for a frequency offset of a reference clock signal is inaccurate because of an existence of a frequency offset of a local crystal oscillator and a parameter drift caused by aging, thereby improving detection precision without replacing hardware.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: September 5, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wang Liu, Yongliang Liu
  • Patent number: 9647707
    Abstract: A signal receiver includes a first mixer configured to mix its first input with its second input associated with an oscillating output of a first synthesizer into an output; a first splitter configured to split its input associated with the output of the first mixer into a first output and a second output; a first switch matrix configured to switch its first input associated with the first output of the first splitter into a first output; a second switch matrix configured to switch its first input associated with the second output of the first splitter into a first output; a second mixer configured to mix its first input associated with the first output of the first switch matrix with its second input associated with an oscillating output of a second synthesizer into an output; and a third mixer configured to mix its first input associated with the first output of the second switch matrix with its second input associated with an oscillating output of a third synthesizer into an output.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: May 9, 2017
    Assignee: RAFAEL MICROELECTRONICS, INC.
    Inventor: Meng-Ping Kan
  • Patent number: 9379901
    Abstract: Provided is a communication method and apparatus using a multi-radio. The communication method includes establishing a link via at least one node included in a group that uses a low data-rate radio (LDR); transmitting a data frame to the at least one node included in the group; and receiving, using a multi-radio based on an availability of the LDR, an acknowledgement (ACK) with respect to the transmitted data frame.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: June 28, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae Seok Kim, Tae Rim Park
  • Patent number: 9172441
    Abstract: Radio frequency (RF) front end circuitry includes one or more antenna ports, one or more RF switching ports, and an RF switch matrix coupled between the antenna ports and the RF front end ports. The RF switch matrix comprises a dual 4×4 multiplexer, and is adapted to selectively couple any one of the antennas to any one of the plurality of RF switching ports.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: October 27, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Marcus Granger-Jones, Nadim Khlat
  • Patent number: 9148124
    Abstract: According to one embodiment, a complex band pass filter comprises a first active filter circuit 10 to receive a first input signal on its input end and a second active filter circuit 20 to receive a second input signal on its input end, the second input signal having a 90-degree phase difference from the first input signal. A predetermined offset is imparted to the first input signal and the second input signal through the first and second signal level adjusting units (30, 40). A differential signal between the output signals of the first and second active filter circuits (10, 20) is outputted.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: September 29, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yosuke Ogasawara
  • Patent number: 9143208
    Abstract: A radio front end that includes a diversity switch module adapted to route diversity receive (RX) signals to transceiver circuitry from diversity antenna switch circuitry coupled to at least one diversity antenna port is disclosed. The radio front end further includes ultrahigh band (UHB) switch circuitry adapted to route UHB transmit (TX) signals from power amplifier and switch circuitry to a UHB antenna port and/or to at least one diversity antenna port. The UHB switch circuitry is also adapted to route UHB RX signals from the UHB antenna port and/or to at least one antenna port to the transceiver circuitry, wherein the UHB RX signals include band 7 (B7) wherein linearity of the UHB switch circuitry is greater than linearity of the diversity switch module.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: September 22, 2015
    Assignee: RF Micro Devices, Inc.
    Inventor: Nadim Khlat
  • Patent number: 9071430
    Abstract: This disclosure includes embodiments of a radio frequency (RF) transceiver having a distributed duplex filtering topology. The RF transceiver includes a power amplifier and a tunable RF duplexer. The tunable RF duplexer is configured to input an RF transmission input signal from the power amplifier, generate an RF transmission output signal that operates within an RF transmission band in response to the RF transmission input signal from the power amplifier, and simultaneously output the RF transmission output signal to an antenna and input an RF receive input signal that operates within an RF receive band from the antenna. The power amplifier includes a plurality of RF amplifier stages coupled in cascode and an RF filter coupled between a first one of the RF amplifier stages and a second one of the RF amplifier stages. Accordingly, the RF filter is configured to provide tuning within the RF receive band.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: June 30, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Ruediger Bauder, Marcus Granger-Jones, Nadim Khlat
  • Patent number: 9014622
    Abstract: A repeater device may be utilized to enable forwarding extreme high frequency (EHF) communication between EHF-enabled wireless devices. The repeater device may utilize spatial isolation to prevent and/or reduce interference between received and transmitted EHF RF signals, wherein reception and/or transmission of EHF RF signals in the repeater device may be performed via narrow beams that may enable minimal interference by transmit EHF RF signals to reception of EHF RF. The repeater device may utilize phased arrays to enable performing beamforming, and signal processing operations, including shift and/or amplitude adjustment, may be performed on signals received and/or transmitted via antenna elements in the phased arrays to enable beamforming during reception and transmission of EHF RF signals. Signal processing operations performed in the repeater device may be modifiable to enable continued spatial isolation between receive and transmit EHF RF signal in the repeater device.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: April 21, 2015
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 9002261
    Abstract: A plurality of repeater devices, each of which may enable forwarding extreme high frequency (EHF) communication between EHF-enabled wireless devices, may form a repeater mesh network. Some or all of the plurality of repeater devices may utilize non-extremely high frequency (non-EHF) control connection in communicating with other repeater devices in the repeater mesh network. The non-EHF control connections may be utilized in establishing, configuring, and/or managing the repeater mesh network. The non-EHF control connections may be also be utilized to enable sending, requesting, and/or receiving periodic and/or dynamic control information. The non-EHF control connections may also be utilized while forming, and/or managing forwarding routes of EHF communication via the repeater mesh network, to enable negotiating and/or setting different isolation techniques among the repeater devices, such as polarization isolation, spatial isolation, and/or use of different frequencies.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: April 7, 2015
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8982282
    Abstract: A display apparatus and a method of searching for a channel in the display apparatus includes a plurality of tuners and a plurality of antenna ports respectively connected to the plurality of tuners. The method includes receiving a channel search command; if the channel search command is input, searching for one of the plurality of antenna ports that is connected to a satellite antenna to receive a broadcasting signal, if one of the plurality of antenna ports is connected to the satellite antenna to receive the broadcasting signal, setting one of the plurality of tuners connected to the one antenna port, to a main tuner, and performing a channel search through the tuner set to the main tuner. Therefore, although an antenna port connected to one of the plurality of tuners initially set to a sub tuner, the display apparatus performs a channel search through the corresponding tuner.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: March 17, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jun-hee Woo
  • Patent number: 8971801
    Abstract: Manufacturing processes monitor forces or pressures within a machine. Metal within machines affect wireless communications within the machines for reporting monitored data. An embodiment of the present invention is a sensor that provides wireless communications unaffected by metals and with less electrical noise than slip rings. An embodiment can monitor manufacturing processes, such as by employing a piezoelectric transducer to measure forces or pressures in a machine and generate an electrical signal representing, for example, forces measured by the piezoelectric transducer. A threshold modulator circuit converts the electrical signal into a series of electrical pulses, which can be transmitted as a corresponding series of magnetic field pulses to a wireless receiver. The receiver reconstructs the original electrical signal, thereby enabling a receiver system to determine physical activities in the machine. The embodiment may be self-powered through use of power generated by the piezoelectric transducer.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: March 3, 2015
    Assignee: University of Connecticut
    Inventors: Robert X. Gao, Sripati Sah
  • Patent number: 8973060
    Abstract: There is provided a method where a terminal amplifies an MBS signal that the terminal receives using a terminal in an MBS service, transmits the amplified signal to another terminal and controls it in order to overcome the fact it is not possible to provide high quality contents over a broad area due to interference signals between MBS zones, a terminal is used as a repeater at MBS transmission time only, and an output of a repeating signal of the terminal is controlled so that an excessive interference signal for another MBS area is not generated when the terminal operates as a repeater.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: March 3, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Young-Il Kim
  • Patent number: 8942621
    Abstract: There is provided a circuit for adjusting phases of IQ local signals. As to a local signal A and a local signal B generated by a local signal generating unit for the purpose of generating IQ quadrature local signals, the local signal B in which the gain is adjusted is added to the output of the local signal A to obtain the local signal A2, and the local signal A in which the gain is adjusted is subtracted from the output of the local signal B to obtain the local signal B2. Even if the phase relationship between the local signal A and the local signal B deviates from 90 degrees, the phase difference between the local signal A2 and the local signal B2 can be adjusted with ease by changing the adjustment amounts of variable amplifiers AMP1 and AMP2.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: January 27, 2015
    Assignee: Asahi Kasei Microdevices Corporation
    Inventor: Takeji Fujibayashi
  • Patent number: 8923882
    Abstract: Methods, systems, and devices for determining a deployment of a wireless network are described herein. One method includes receiving, via a computing device, radio frequency data associated with a structure, wherein the structure includes a number of sensor nodes, receiving physical parameters associated with the structure, determining a number of relay nodes to deploy in the structure based, at least in part, on the radio frequency data and the physical parameters, and determining a location to deploy each of the number of relay nodes in the structure based, at least in part, on the radio frequency data and the physical parameters.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: December 30, 2014
    Assignee: Honeywell International Inc.
    Inventors: Amol Gandhi, Ganapathy Viswanath, Satish Chandra, Prashanth Lingala, Vilas Ingle, Lokesh Sambasivan
  • Patent number: 8897698
    Abstract: The invention relates to a data transfer method in a multi-hop relay system. The data transfer method comprises: a step for allowing a base station to receive from a first terminal the channel information (Hd,1) between the base station and the first mobile station, a step for making the base station generate an interference cancellation precoding matrix using Hd,1, a step for forcing the base station to transfer first data to a relay station, and a step for making the relay station transfer the first data to the first mobile station and forcing the base station to transfer second data to a second mobile station, wherein the second data is converted using the interference cancellation precoding matrix. According to the disclosed data transfer method in the multi-hope relay system, the base station transfers data to another mobile station efficiently when the relay station transfers data to a mobile station.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: November 25, 2014
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Young Hyun Jeon, Tak Ki Yu, Jong Hyung Kwun, Chan Ho Min, Min Suk Kang, Hyu Dae Kim, Bang Chul Jung, Dong Won Lee
  • Patent number: 8855546
    Abstract: A satellite receiver that is operable in a single cable system and that is configured to receiver satellite signals via an interface, comprises a controller configured to instruct the interface to perform a blind channel scan process over a predetermined frequency range to obtain measured spectrum signals and to change the predetermined frequency range until a desired frequency range has been measured. The satellite receiver further comprises a processing device configured to receive the measured spectrum signals, to process the measured spectrum signals to obtain a spectrum section and to concatenate the measured spectrum sections to obtain a spectrum.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: October 7, 2014
    Assignee: SONY Corporation
    Inventor: Ben Eitel
  • Patent number: 8843059
    Abstract: A system for gateway RF diversity using a configurable spot beam satellite including a satellite, a first gateway connected to a first VSAT population through the satellite by a first gateway spot beam and a first user spot beam set, a diversity gateway located outside of the first gateway spot beam for the first gateway, and a diversity control function to command the satellite to connect the first user spot beam set for the first gateway to a diversity gateway spot beam when the first gateway experiences service interruption.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: September 23, 2014
    Assignee: Hughes Network Systems, LLC
    Inventors: Dave Roos, Adrian Morris, Stanley Kay, George Choquette
  • Patent number: 8838033
    Abstract: Methods and systems for processing a signal with a corresponding noise profile are disclosed. Aspects of the method may comprise analyzing spectral content of the noise profile. At least one noise harmonic within the signal may be filtered based on said analyzed spectral content. The filtered signal may be amplified. The noise profile may comprise a phase noise profile. The signal may comprise at least one of a sinusoidal signal and a noise signal. At least one filter coefficient that is used to filter the at least one noise harmonic may be determined. The filtering may comprise low pass filtering. The signal may be modulated prior to filtering. The amplifying may comprise buffering. A non-linearity characteristic of the signal may be determined and a noise harmonic may be low-pass filtered within the signal based on the determined non-linearity characteristic.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: September 16, 2014
    Assignee: Broadcom Corporation
    Inventor: Shervin Moloudi
  • Patent number: 8838053
    Abstract: Frequency multipliers having corresponding methods and multifunction radios comprise: N multipliers, wherein N is an integer greater than one; wherein the multipliers are connected in series such that each of the multipliers, except for a first one of the multipliers, is configured to mix a periodic input signal with an output of another respective one of the multipliers; wherein the first one of the multipliers is configured to mix the periodic input signal with the periodic input signal.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: September 16, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Li Lin, Xiang Gao, Chi-Hung Lin
  • Patent number: 8805554
    Abstract: A notch filter includes first, second, and third difference modules, a delay module, and a gain module. The first difference module calculates a first difference between a control signal in a pulse width modulation (PWM) system and a feedback value. The second difference module calculates a second difference between the first difference and a delayed second difference. The delay module generates the delayed second difference by introducing a one period delay to the second difference, wherein the period is based on a Nyquist frequency of the control signal. The gain module generates the feedback value by applying a gain to the delayed second difference. The third difference module generates a filtered control signal by calculating a difference between the signal and the feedback value, wherein the filtered control signal is used to control an operating parameter of the PWM system.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: August 12, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Paul Walker Latham, II, Stewart Gall Kenly, II, Mansur Kiadeh
  • Patent number: 8798526
    Abstract: Techniques for selecting and processing signals from different stations in a wireless network are described. A destination station may receive a direct signal from a source station and at least one relay signal from at least one relay station. The destination station may determine metrics for the source and relay stations, e.g., based on pilots received from these stations. The destination station may select at least one signal to process from among the direct and relay signals based on the metrics for the source and relay stations. The destination station may select the direct signal if the metric for the source station exceeds a threshold. The destination station may select the relay signal from each relay station having a metric exceeding at least one threshold. The destination station may process the at least one selected signal to recover a transmission sent by the source station to the destination station.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: August 5, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Tingfang Ji, Arnab Chakrabarti, Anastasios Stamoulis, Dexu Lin, Kambiz Azarian Yazdi
  • Patent number: 8787827
    Abstract: Improved gain control for a digital signal processing (DSP) repeater, such as a bi-directional repeater, is disclosed. A repeater includes a back-end subsystem which comprises, for each channel in a set of wanted frequency channels that are amplified by the repeater, a coupler (314) arranged to provide a monitor signal corresponding with an output channel power level. A feedback loop (306) receives the monitoring signal, and incorporates a power control circuit (308) that compares the monitored output channel power level with a predetermined maximum output signal level (310). A corresponding control signal is generated, and provided to a variable attenuator (304) in order to maintain the individual output channel power level at or below the maximum output signal level (310). Advantageously, a DSP output level control function (404) is also provided, which maintains the output signal level of each digital channel below a maximum rated value for a digital-to -analogue converter (402).
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: July 22, 2014
    Assignee: RF Industries Pty Ltd
    Inventors: Lambertus Anthony M. Voskulen, Zheng Li, Mykola Kyrylenko, Michael Leigh Beard, Jack Zaprianov Grozev
  • Patent number: 8762054
    Abstract: A protocol independent interface for processing, within a mobile device, protocol aiding data received at a call processor with a Global Positioning System (“GPS”) interface, where the protocol aiding data is produced according to a Geolocation Server Station protocol is disclosed. The protocol independent interface may include a means for receiving, at the GPS interface, the protocol aiding data received at the call processor, means for converting the received protocol aiding data to interface data that is transparent to the Geolocation Server Station protocol, and means for passing the interface data to a GPS module.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 24, 2014
    Assignee: CSR Technology Inc.
    Inventors: Steve Chang Chiayee, Ashutosh Pande, Lionel Jacques Garin, Gengsheng Zhang
  • Patent number: 8750786
    Abstract: The invention relates to a relay or repeater node (21) for use in a wireless communications system said node comprising a receive antenna (23) for receiving a signal through a wireless connection, an amplifier (30) for amplifying the signal and a transmit antenna (27) for forwarding the amplified signal, said node further comprising a mode switching unit (31) for switching between at least a first and a second mode of operation of the node in dependence of an amplification gain requirement. This enables optimization of the node for varying conditions in the network.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: June 10, 2014
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Peter Larsson, Niklas Johansson
  • Patent number: 8745184
    Abstract: A method for wireless communication provisioning is disclosed. A first wireless communication provisioning state associated with one or more identifiers is defined. A second wireless communication provisioning state associated with one or more identifiers is defined. A state transition rule is defined, wherein the state transition rule defines a transition between the first wireless communication provisioning state and the second wireless communication provisioning state, wherein the first wireless communication provisioning state and the second wireless communication provisioning state are based on the lifecycle of the service of a wireless communication device associated with the first and second wireless communication provisioning states.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: June 3, 2014
    Assignee: Jasper Wireless, Inc.
    Inventors: Scott Barkley, Amit Gupta, Zhongling Li
  • Patent number: 8731123
    Abstract: A demultiplexing device that includes frequency-conversion and reception low-pass-filter units that perform a frequency converting process and a low-pass filtering process for causing a signal to pass through a desired band, perform downsampling to reduce a sampling rate to half of a data rate of an input signal, and output the signal, reception channel-filter units that waveform-shape a signal with a desired frequency characteristic and output the waveform-shaped signal. The demultiplexing device also includes a filter-bank control unit that generates a clock control signal for supplying a clock to frequency-conversion and reception low-pass-filter units and reception channel-filter units corresponding to signal passage bands, based on channel information, and a reception-clock supply unit that supplies a clock to frequency-conversion and reception low-pass-filter units and reception channel-filter units corresponding to signal passage bands, based on the clock control signal.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: May 20, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Akinori Fujimura
  • Patent number: 8718563
    Abstract: A method for processing a signal with a corresponding noise profile includes analyzing spectral content of the noise profile, filtering at least one noise harmonic within the signal based on the analyzed spectral content, and limiting the filtered signal. The noise profile may include a phase noise profile. The signal may include a sinusoidal signal and/or a noise signal. At least one filter coefficient that is used to filter the at least one noise harmonic may be determined. The filtering may include low pass filtering. The limiting may include hard-limiting of the filtered signal. A phase difference between the limited signal and a reference signal may be detected.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: May 6, 2014
    Assignee: Broadcom Corporation
    Inventor: Shervin Moloudi
  • Patent number: 8681685
    Abstract: According to a detailed embodiment of the invention, the RS implements the following operations by using each of M shift parameter groups: Based on M shift parameters in the group, shifting respectively M decoded bit streams and merge the M shifted bit steams to get a check bit stream. Consequently M check bit streams are obtained by using M shift parameter groups. Then the RS transmits M check bit streams to the BS. The BS has received the M uplink signals from mobile terminals before and makes the M check bit streams as the check information of those uplink signals in order to check them better and reduce error rate. By adopting the method and device proposed by the invention, it is ensured in the low SNR regime error user rate or error block rate is more ideal in multi-user detection in the BS.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: March 25, 2014
    Assignee: Alcatel Lucent
    Inventors: Jun Li, Mingli You
  • Publication number: 20140057556
    Abstract: An apparatus for wireless relaying comprises: a transmission unit for generating a wireless signal; an amplification unit for amplifying and outputting the wireless signal; a conversion unit for converting the wireless signal into a digital signal; and an adjustment unit for adjusting the amplification ratio of the amplifying unit so that the difference between an output level value of the digital signal and a predetermined target power is lower than a predetermined numerical value.
    Type: Application
    Filed: October 19, 2011
    Publication date: February 27, 2014
    Applicant: KT CORPORATION
    Inventors: Jae Ho Chung, Byung Wan Yoon, Yung Ha Ji, Kyu Jeong Han
  • Patent number: 8630211
    Abstract: A wireless repeater includes a receiver circuit implemented as an intermediate frequency (IF) subsampling receiver and a transmitter circuit implemented as a direct conversion (zero-IF) transmitter. The repeater further includes a reference receiver implemented as an IF subsampling receiver to sample a portion of the transmit signal prior to over-the-air transmission for use as the reference signal for channel estimation. Highly accurate channel estimation is obtained by using the reference signal from the reference receiver as the reference signal accounts for distortions in the transmitter circuit of the repeater. The repeater may include an echo canceller to cancel an estimated feedback amount from an input signal based on the channel estimation.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: January 14, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Kenneth M. Gainey, James Arthur Proctor, Jr., Dhananjay Ashok Gore
  • Patent number: 8611809
    Abstract: A broadcast satellite single wire interface comprises a low noise block amplifier module having multiple outputs, a plurality of filter banks, each filter bank coupled to each of the outputs of the low noise block amplifier module in a respective fashion and comprising a plurality of filters, and a plurality of analog-to-digital (A/D) converters, each A/D converter coupled to a filter in the plurality of filters in the plurality of filter banks in a respective fashion, wherein the A/D converters directly sample incoming downconverted broadcast satellite signals and the sampled incoming downconverted broadcast signals are output on a single wire in a stacked output.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: December 17, 2013
    Assignee: The DIRECTV Group, Inc.
    Inventor: Robert F. Popoli
  • Publication number: 20130309962
    Abstract: A system for repeating radio signals to the outside of a structure, from transmitters operating within a structure that normally prevents radio transmissions from propagating out of the structure. A system for repeating radio signals to the inside of a structure, from transmitters operating outside a structure that normally prevents radio transmissions from propagating into the structure.
    Type: Application
    Filed: July 29, 2013
    Publication date: November 21, 2013
    Applicant: INTEROPERABILITY TECHNOLOGIES GROUP LLC
    Inventors: Robert S. BLOCK, Alexander A. Wenger, Rene A. Stiegler, III
  • Patent number: 8577286
    Abstract: One embodiment is directed to a system for use with a coverage area in which one or more wireless units wirelessly transmit using a wireless radio frequency spectrum. The system comprises a first unit, and a plurality of second units communicatively coupled to the first unit using at least one communication medium. Each of the plurality of second units generates respective digital RF samples indicative of a respective analog wireless signal received at that second unit. Each of the plurality of second units communicates the respective digital RF samples generated by that second unit to the first unit using the at least one communication medium. The first unit digitally sums corresponding digital RF samples received from the plurality of second units to produce summed digital RF samples. The system is configured so that an input used for base station processing is derived from the resulting summed digital RF samples.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: November 5, 2013
    Assignee: ADC Telecommunications, Inc.
    Inventor: Philip M. Wala
  • Patent number: 8577305
    Abstract: Embodiments of the present invention may be used to generate oscillating signals. One embodiment of the present invention includes a circuit that receives a differential signal to be divided. The circuit converts the differential signal into an injection signal. The injection signal is coupled to an oscillator, and the oscillator generates an output signal having a frequency that is a fraction of the frequency of the differential input signal. In another embodiment, the present invention includes a MIMO wireless communication system. The MIMO system may use the divider circuit to divide a local oscillator signal with reduced common mode distortion.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: November 5, 2013
    Assignee: Marvell International Ltd.
    Inventors: Paolo Rossi, Sang Won Son
  • Patent number: 8571469
    Abstract: A system to receive using MEMS elements is provided. The system includes means for receiving a broadband signal; means for selecting a superband of frequencies from the received broadband signal; means for selecting bands within the superband of frequencies, wherein the bands each have a center frequency that is offset from the other center frequencies; means for steering output from the means for selecting bands; and means for receiving the output from the means for steering output.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: October 29, 2013
    Assignee: Honeywell International Inc.
    Inventor: E. F. Charles LaBerge
  • Patent number: 8559379
    Abstract: A first repeater operating within a wireless network including a second repeater capable of communicating with the first repeater, and first and second wireless station devices capable of communicating with at least one of the first repeater and the second repeater, includes a reception device for receiving a wireless signal at a reception frequency; a detector for detecting if a predetermined portion of the received wireless signal includes a modified portion to thereby determine that the received signal is from the second repeater; and a transmission device for transmitting the wireless signal to one of the first and second wireless station devices at a transmission frequency to thereby repeat the wireless signal.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: October 15, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Kenneth M. Gainey, James A. Proctor, Jr., Lawrence Wayne LaMont, Jr., James C. Otto, Carlos M. Puig, Ross L. Lintelman
  • Publication number: 20130267165
    Abstract: An active antenna system for a mobile communications network and a method for relaying radio signal in the mobile communications network is disclosed. The active antenna system comprises a plurality of antenna elements for relaying radio signals at a first frequency band. The antenna elements are connected to a plurality of signal paths. A plurality of signal inputs for inputting radio signals at a second frequency band is connected to the plurality of signal paths. A plurality of mixers in the signal paths converts the frequency of the radio signals between the first frequency band and the second frequency band. A plurality of local oscillators is connected to the mixers and a single reference oscillator can be connected through a plurality of first dispersion elements to different ones of the plurality of local oscillators through a plurality of first oscillator signal paths and to a digital signal processor.
    Type: Application
    Filed: June 5, 2013
    Publication date: October 10, 2013
    Inventor: Peter Kenington
  • Patent number: 8543055
    Abstract: A passive frequency translator with positive conversion voltage gain including at least one input node for receiving an input signal, at least one output node for providing an output signal, and a network which includes capacitors and switches operatively coupled the capacitors and the one or more input and output nodes. The switches are controlled by corresponding clock signals to capture charge of the input signal onto the capacitors and to develop the output signal by performing frequency translation of the input signal by a mixing frequency. The output signal has a net voltage gain relative to the input signal in which energy of the output signal is predominantly derived from energy of the input signal. Furthermore, each of at least three capacitors are configured to capture charge from the input signal and to add constructively to deliver charge to at least one other capacitor coupled to the output node.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: September 24, 2013
    Assignee: Apple Inc.
    Inventors: Benjamin W. Cook, Axel D. Berny
  • Publication number: 20130244573
    Abstract: Aspects of a method and system for frequency control in a frequency shifting repeater are provided. In this regard, a reference frequency may be divided to generate a first pair of local oscillator (LO) signals, the first pair of LO signals may be divided to generate a second pair of LO signals. The two pairs of LO signals may be utilized to frequency shift a received signal for repeating the signal on a different frequency. The frequency shifted signal may be generated by down-converting the received signal utilizing the first pair of LO signals, up-converting the down-converted signal utilizing the second pair of LO signals, and combining the resulting up-converted signals. The reference frequency may be divided by a first scaling factor to generate the first pair of LO signal which, in turn, may be divided by a second scaling factor to generate the second pair of LO signals.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 19, 2013
    Applicant: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8520655
    Abstract: One object of the present invention is to effectively utilize adaptive modulation and improve stability of wireless communication, without departing from standards, by independently controlling MCSs of retransmission data and usual data and using MCS suitable for each data. In the wireless communication system of the present invention, a frame, in which an error occurs, in both a transmitting device and a receiving device and the error part are specified, and MCS used in the frame is specified. Therefore, it is possible to modulate/demodulate the error part based on desired MCS without loading MCS on HARQ.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: August 27, 2013
    Assignee: KYOCERA Corporation
    Inventor: Toru Sahara
  • Patent number: 8514915
    Abstract: Coverage for a wireless network is improved using a frequency shifting scheme. A wireless signal in a frequency band is shifted to another band, and carried in the shifted band to another location where the signal is shifted back to the original frequency band. The frequency shifting may utilize frequency shifting schemes such as mixer/filter and heterodyne. The wireless signal can be frequency shifted by converting it to other representing signals (such as I/Q components) and forming the frequency-shifted signal from the representations. The transmission medium may use dedicated wiring or existing service wiring in a residence or building, including LAN, telephone, AC power and CATV wiring. The system may be enclosed as a stand-alone unit, housed in integrated form as part of a service outlet or as a snap-on/plug-in module.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: August 20, 2013
    Assignee: Corning MobileAccess Ltd
    Inventors: Yehuda Binder, Ami Hazani
  • Patent number: 8509136
    Abstract: A base station BS transmits downlink data to a relay station RS. A mobile station MS transmits uplink data to the relay station RS. The relay station RS determines a first modulation scheme for transmitting the uplink data to the base station BS, and determines a second modulation scheme for transmitting the downlink data to the mobile station MS. The relay station RS multiplies a symbol sequence obtained by the first modulation scheme by a symbol sequence obtained by the second modulation scheme for each symbol, and multicasts the multiplication result to the base station BS and the mobile station MS.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: August 13, 2013
    Assignee: Fujitsu Limited
    Inventors: Jianming Wu, Yoshinori Tanaka, Kazuhisa Obuchi, Mitsuhiro Azuma, Tomohiko Taniguchi
  • Patent number: 8509684
    Abstract: A microwave frequency converter for a radar receiver is provided in which a frequency of a local oscillator of the microwave frequency converter can be prevented from interfering with an oscillation frequency of a magnetron included in the radar receiver and which can receive a signal from a considerably short distance. A voltage of an RF amplifier connected to the microwave frequency converter is synchronized with an oscillation output of the magnetron. The gate and drain voltages of a FET used in the RF amplifier are simultaneously switched OFF only during times before and after the magnetron performs oscillation, thereby switching an amplification function of the FET to an attenuation function thereof to increase a switching loss of the microwave frequency converter.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: August 13, 2013
    Assignee: Furuno Electric Company Limited
    Inventors: Akio Funae, Koji Dai, Hideki Torizuka
  • Patent number: 8498570
    Abstract: A system for repeating radio signals to the outside of a structure, from transmitters operating within a structure that normally prevents radio transmissions from propagating out of the structure. A system for repeating radio signals to the inside of a structure, from transmitters operating outside a structure that normally prevents radio transmissions from propagating into the structure.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: July 30, 2013
    Assignee: Interoperability Technologies Group LLC
    Inventors: Robert S. Block, Alexander A. Wenger, Rene A. Stiegler, III
  • Patent number: 8489019
    Abstract: A repeater device may be utilized to enable forwarding extreme high frequency (EHF) communication between EHF-enabled wireless devices. The repeater device may utilize spatial isolation to prevent and/or reduce interference between received and transmitted EHF RF signals, wherein reception and/or transmission of EHF RF signals in the repeater device may be performed via narrow beams that may enable minimal interference by transmit EHF RF signals to reception of EHF RF. The repeater device may utilize phased arrays to enable performing beamforming, and signal processing operations, including shift and/or amplitude adjustment, may be performed on signals received and/or transmitted via antenna elements in the phased arrays to enable beamforming during reception and transmission of EHF RF signals. Signal processing operations performed in the repeater device may be modifiable to enable continued spatial isolation between receive and transmit EHF RF signal in the repeater device.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: July 16, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran