With A Common Signal Processing Stage Patents (Class 455/84)
  • Patent number: 7869778
    Abstract: A technique to share a local oscillator signal between two radio frequency integrated circuits (RFICs). The local oscillator signal generated internally by one RFIC is ported to the other RFIC for use in transmit or receive operation. The local oscillator signal that is ported may be an RF local oscillator signal. Each RFIC may include a bi-directional port circuit that can be operated to make the RFIC a master, slave or may be totally disabled to disable the porting feature. This is particularly useful in RFICs that are used to communicate using MIMO radio algorithms which rely for optimum performance on phase and frequency coherency among a plurality of transmitters and a plurality of receivers.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: January 11, 2011
    Assignee: IPR Licensing, Inc.
    Inventor: Mark S. Cavin
  • Publication number: 20110003564
    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: Application
    Filed: July 2, 2010
    Publication date: January 6, 2011
    Applicant: EM Microelectronic-Marin S.A.
    Inventors: Arthur DESCOMBES, Tindaro Pittorino
  • Publication number: 20100315990
    Abstract: This inventive wireless communication system comprises a plurality of wireless communication devices (101) each including a radiating oscillator (1), a baseband signal generating unit (4) and a reception signal detecting unit (7).
    Type: Application
    Filed: September 26, 2008
    Publication date: December 16, 2010
    Applicant: National Inst. of info. and Communications Tech.
    Inventors: Hitoshi Utagawa, Toshiaki Matsui
  • Publication number: 20100311353
    Abstract: An improved communication system and method employing an actively controlled antenna array architecture is disclosed. The array contains a plurality of driven radiating elements that are spatially arranged having a pair of radiating elements fed with an RF signal predistorted so as to provide a controlled variation of the antenna array's elevation radiation pattern. High power amplifier (PA) efficiency is maintained by adaptive predistortion, coupled to each high power PA, while providing beam tilt and side lobe control.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 9, 2010
    Inventors: Anthony Teillet, Scott Carichner, Alexander Rabinovich
  • Patent number: 7848709
    Abstract: In one embodiment of the present invention, two crystal oscillator circuits are coupled in parallel to provide differing performance according to mode. Generally, a first circuit provides low phase noise and high accuracy while a second circuit provides greater phase noise within an acceptable tolerance while consuming significantly less power in a low power mode of operation. The second circuit includes an entirely separate amplifier for the low power operation that tolerates a relatively smaller input signal swing but that consumes even less power. The first circuit, which comprises selectable amplification elements, and the second circuit are coupled in parallel with selectable resistive elements and capacitive elements to provide varying amounts of amplification and filtering according to whether an operational mode is in a startup mode, a normal mode, or a low power mode of operation.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: December 7, 2010
    Assignee: Broadcom Corporation
    Inventor: Michael Steven Kappes
  • Patent number: 7844230
    Abstract: An integrated multimode radio includes a multimode receiver and a multimode transmitter. The multimode receiver includes a shared receiver front-end, a receiver multiplexor, and a plurality of receiver IF stages. The multimode transmitter includes a shared transmitter front-end, a transmitter multiplexor, and a plurality of transmitter IF stages.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: November 30, 2010
    Assignee: Broadcom Corporation
    Inventors: Hooman Darabi, Brima Ibrahim, Ahmadreza Rofougaran
  • Publication number: 20100297961
    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: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Inventor: Hung-Ming (Ed) Chien
  • Patent number: 7831214
    Abstract: A T/R module utilizes a low noise amplifier in both the transmit and receive modes. In this manner the low noise amplifier enables one to provide a T/R module which has reduced prime power and lower weight and particularly useful in airship radar systems and spaced based radar systems. The low noise amplifier is switched between a receive and a transmit mode by switching mechanism which in the receive mode enables the antenna to be directed to the input of the low noise amplifier with the output of the low noise amplifier directed to a phase shifter and attenuator. The switching operates in a transmit mode where the output of the low noise amplifier is connected to the input of the antenna while the input of the low noise amplifier is now connected to the phase shifter and attenuator for providing a transmit signal. The invention has an additional benefit of enabling linear Class A operation in the transmit mode in both radar and communication systems supporting beam shaping and waveform shaping capabilities.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: November 9, 2010
    Assignee: Lockheed Martin Corporation
    Inventor: Peter H. Stockmann
  • Patent number: 7826804
    Abstract: A communication system includes a housing with a base section and a lid pivotally connected thereto. The housing includes insulating layers positioned along a bottom surface of the base section and an inner surface of the lid. The lid includes a handle coupled to a distal end thereof. A power supply source is seated within the base section, and a power regulating circuit is coupled thereto. A controller is coupled to the power regulating circuit, and a transducer is coupled to the controller. A receiver is seated within the housing and includes a aerial connected thereto. A transmitter and a portable media player are positioned on a body portion of the operator. A receiver transmits a control signal to a controller, and the controller parses the control signal and generates a corresponding output signal that is transmitted to the transducer.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: November 2, 2010
    Inventors: Patrick Wright, Martha Wright, Frank Depetri
  • Patent number: 7822389
    Abstract: Methods and apparatus to provide an auxiliary receive path to support transmitter functions are disclosed. An example transceiver includes an antenna and a duplexer coupled to the antenna. A transmitter is coupled to the duplexer to output a transmit signal at a transmit frequency. A receiver is coupled to the duplexer to receive a received signal at a receiver frequency. A signal processor is coupled to the transmitter and receiver. An auxiliary receiver is communicatively coupled to the signal processor to receive the transmit signal output from the transmitter and send an auxiliary receiver signal to the signal processor. The signal processor adjusts the transmit signal based on the auxiliary receiver signal.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: October 26, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Khurram Muhammad, Dirk Leipold
  • Patent number: 7822065
    Abstract: A software architecture for future open wireless architecture (OWA) mobile terminal providing an open and secured software platform supporting various wireless air interfaces with multi-dimensional mobility handovers and maximized spectrum efficiency for the truly service-oriented fixed, mobile and wireless communications convergence.
    Type: Grant
    Filed: January 7, 2007
    Date of Patent: October 26, 2010
    Inventor: Wei Lu
  • Publication number: 20100240325
    Abstract: A compensation method for radio frequency module performance, it is adding a module monitoring circuit and a radio frequency power detection circuit to an existing radio frequency module, meanwhile replacing an existing hardware compensation circuit with a radio frequency digital controlled attenuator. The method replaces hardware method by a method of combining software of the module monitoring circuit and hardware such as module monitoring circuit, radio frequency digital controlled attenuator and radio frequency power detection circuit, as well as intelligently compensates the radio frequency module by using data obtained by predefined table or formula/algorithm, so as to adjust each characteristic index of the device accurately and easily, thus to improve performance of the radio frequency module and further meet the requirement of working stability of the radio frequency module. The present invention further provides a radio frequency module improved by such method.
    Type: Application
    Filed: July 1, 2008
    Publication date: September 23, 2010
    Inventors: Chengsheng Li, Yali Wang, Limeng Xiao
  • Patent number: 7796577
    Abstract: The present invention provides a method for designing operation schedules of a fast Fourier transform (FFT) and a multiple input multiple output orthogonal frequency division multiplexing modem (MIMO-OFDM modem) thereof. According to the present invention, an operation speed of an FFT operator is set up, a receiving symbol is arranged in an OFDM symbol duration in an FFT after receiving the symbol, a transmitting symbol is arranged in an OFDM symbol duration in the FFT schedule before transmitting the symbol, a transmitting/receiving symbol which has the same timing is inserted into an idle symbol duration of the FFT schedule, an FFT schedule which is good to be deleted is deleted, and symbols of the deleted FFT schedule are re-arranged in order to not have an error occur in transmitting/receiving timing.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: September 14, 2010
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd., KT Corporation, SK Telecom Co., Ltd, KTFreetel Co., Ltd., Hanaro Telecom, Inc.
    Inventors: Jun-Woo Kim, Jae-Gun Jung, Youn-Ok Park
  • Publication number: 20100227572
    Abstract: A radio communications system having a processing circuit, comprising a freely programmable logic control and processing receiving signals and transmission signals. The programming of the freely programmable logic control is modified in order to adjust the same to the sending operation and the receiving operation. Said modification carried out by charging and discharging the functional blocks in the freely programmable logic control via a bus system. The adjustment occurs without any interruption of the function of the radio communications system.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 9, 2010
    Applicant: RHODE & SCHWARZ GMBH & CO. KG
    Inventor: Juergen Foag
  • Patent number: 7783271
    Abstract: A method and apparatus for receiving a radio frequency signal and a method and apparatus for transmitting a modulation signal in a multiple channel radio system. The method for receiving the radio frequency signal involves mixing the radio frequency signal with a demodulating signal, tunable in frequency steps greater than the channel spacing of the multiple channel radio system to facilitate rapid frequency adjustments. The resultant intermediate signal is then mixed with another demodulating signal, tunable in relatively smaller frequency steps in order to select the channel containing the radio frequency signal.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: August 24, 2010
    Assignee: QUALCOMM, Incorporated
    Inventor: John A. Samuels
  • Patent number: 7783266
    Abstract: When a power supply switch is turned on and an RF signal and an LO signal are input to a bipolar transistor, a mixed signal of both signals is output as an IF signal. When the power supply switch is turned off, the bipolar transistor operates as two diodes connected between a base terminal and an emitter terminal and between the base terminal and a collector terminal. When the IF signal and the LO signal are input, the input signals are mixed with each other by the diodes and the RF signal is output. Accordingly, one frequency conversion has a plus conversion gain and when bidirectional frequency conversion is performed by the use of one frequency converter, an external circuit such as a signal path switching switch is not necessary.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: August 24, 2010
    Assignee: Panasonic Corporation
    Inventors: Yoshifumi Hosokawa, Michiaki Matsuo, Noriaki Saito
  • Publication number: 20100203847
    Abstract: A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency.
    Type: Application
    Filed: March 27, 2009
    Publication date: August 12, 2010
    Inventor: OLEKSANDR GORBACHOV
  • Publication number: 20100203846
    Abstract: A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency.
    Type: Application
    Filed: March 27, 2009
    Publication date: August 12, 2010
    Inventor: Oleksandr Gorbachov
  • Publication number: 20100202557
    Abstract: A radio apparatus comprising: a radio frequency processing module for converting radio frequency signals from an antenna to intermediate frequency signals; an intermediate frequency processing module located remotely from the radio frequency processing module, for receiving intermediate frequency signals and processing said signals according to at least one communications protocol; and a digital data link for connecting the radio frequency processing module and the intermediate frequency processing module, for transfer of the intermediate frequency signals.
    Type: Application
    Filed: November 30, 2009
    Publication date: August 12, 2010
    Applicant: Thales Holdings UK Plc
    Inventor: Philip J. Harris
  • Patent number: 7773953
    Abstract: Provided is a wireless transceiving apparatus for variability of signal processing band, in which at least one resonator of an analog processor and a VCO are simultaneously controlled using a frequency synthesizer, and a frequency of the VCO and a resonance frequency of the analog processor are controlled to have a rational number ratio, thereby capable of varying the signal processing band. The wireless transceiving apparatus includes: an analog processor having a plurality of resonators on a path of transmission/reception signals, for performing analog signal processing; a digital processor for performing digital signal processing on an output signal of the analog processor or data to be transmitted to the analog processor; and a frequency synthesizer for providing a local oscillation (LO) frequency and a controlling signal to the resonators of the analog processor so as to vary a signal processing band of the analog processor.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: August 10, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seon-Ho Han, Mun-Yang Park, Hyun-Kyu Yu, Cheon-Soo Kim
  • Patent number: 7756489
    Abstract: A radio communication apparatus having a radio modem for processing a signal in a radio frequency band, a signal processor for processing a base band of a transmission or reception signal, and a CPU for processing a protocol. The signal processor includes signal processing blocks implemented by programmable software. Each of the signal processing blocks processes a signal of reception signal data input from the radio modem or from a preceding stage of one of the signal processing blocks or a signal of transmission signal data input from the CPU or from the preceding stage of signal processing block on the basis of a control signal input together with the transmission signal data or the reception signal data. The control signal can include information required by all the signal processing blocks in a common format.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: July 13, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Ishikawa, Manabu Kawabe, Katsuhiko Tsunehara, Hirotake Ishii
  • Publication number: 20100159826
    Abstract: A radio-frequency circuit for a wireless signal transceiver is disclosed. The wireless signal transceiver is utilized for receiving a first wireless signal and transforming the first wireless signal into a second wireless signal. The radio-frequency circuit includes a transmission line including a first end and a second end, a reception antenna coupled to the first end of the transmission line for receiving the first wireless signal, a transmission antenna coupled to the first end of the transmission line for emitting the second wireless signal, a first filtering circuit coupled between the second end of the transmission line and the wireless signal transceiver for filtering out the first wireless signal, and a second filtering circuit coupled between the second end of the transmission line and the wireless signal transceiver for filtering out the second wireless signal.
    Type: Application
    Filed: December 2, 2009
    Publication date: June 24, 2010
    Inventors: Jui-Hsiang Chou, Cheng-Hsiung Hsu, Chia-Ming Wang
  • Publication number: 20100144290
    Abstract: Techniques for designing a single-balanced mixer coupled to a dummy portion with a dummy load to improve noise rejection. In an aspect, a single-ended signal (RF) from a stage preceding the mixer, e.g., a low-noise amplifier (LNA), is coupled to the input of the single-balanced mixer to be mixed with a local oscillator (LO) signal. A dummy portion replicating the topology of the single-balanced mixer is coupled to the single-balanced mixer to improve noise rejection, with the LO signal also provided to the dummy portion. The input of the dummy portion may be coupled, e.g., to a dummy load, which is designed to replicate the loading characteristics of the preceding stage, e.g., the LNA.
    Type: Application
    Filed: August 10, 2009
    Publication date: June 10, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Himanshu Khatri, Li Liu
  • Publication number: 20100136927
    Abstract: A configurable transceiver includes an RF receiver section that generates at least one downconverted signal from a received RF signal. A receiver processing module processes at least one downconverted signal in a plurality of receiver stages to produce a stream of inbound data, wherein the receiver processing module is configurable in response to a control signal to selectively bypass at least one of the plurality of receiver processing stages. A transmitter processing module processes outbound data in a plurality of transmitter stages to produce at least one baseband signal, wherein the receiver processing module is configurable in response to the control signal to selectively bypass at least one of the plurality of transmitter processing stages. An RF transmitter section generates at least one RF signal from the at least one baseband signal.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 3, 2010
    Applicant: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7714534
    Abstract: Multiple function current-sharing charging systems and methods are provided. Where first and second rechargeable power supplies are connected to a charging system, a first charging current is provided to the first rechargeable power supply and a second charging current is provided to the second rechargeable power supply. Upon detection of a predetermined charge level of one of the rechargeable power supplies, a third charging current is provided to the first rechargeable power supply and a fourth charging current is provided to the second rechargeable power supply.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: May 11, 2010
    Assignee: Research In Motion Limited
    Inventors: Ryan M. Bayne, Felipe O. Simoes, Colin N. Todd
  • Patent number: 7706838
    Abstract: The interactive authentication system allows a consumer to interact with a base station, such as broadcast media (e.g., television and radio) or PC, to receive coupons, special sales offers, and other information with an electronic card. The electronic card can also be used to transmit a signal that can be received by the base station to perform a wide variety of tasks. These tasks can include launching an application, authenticating a user at a website, and completing a sales transaction at a website (e.g., by filling out a form automatically). The interaction between the base station and the electronic card is accomplished by using the conventional sound system in the base station so that a special reader hardware need not be installed to interact with the electronic card. The user is equipped with an electronic card that can receive and transmit data via sound waves. In the various embodiments, the sound waves can be audible or ultrasonic (which can be slightly audible to some groups of people).
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: April 27, 2010
    Assignee: BeepCard Ltd.
    Inventors: Alon Atsmon, Amit Antebi, Tsvi Lev, Moshe Cohen, Gavriel Spcyer, Alan Sege, Nathan Altman, Rami Anati
  • Publication number: 20100062729
    Abstract: Circuit, process, and use of a memory for transmitting and/or receiving in a radio network, with a memory, which has a first interface for reading and writing and a second interface for reading and writing, with an arithmetic logic unit, which is connected to the first interface for reading and writing, with a control unit, which is connected to the second interface for reading and writing, and with a transmit/receive unit, which is connected to the control unit for writing received data via the second interface of the memory and for reading transmit data via the second interface of the memory.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 11, 2010
    Inventors: Dirk Haentzschel, Thomas Hanusch
  • Publication number: 20100062727
    Abstract: A high-frequency device having high-frequency-signal-treating circuits in and on a laminate substrate comprising pluralities of dielectric layers having conductor patterns, the high-frequency-signal-treating circuits having amplifier circuits and switch circuits; terminals including input and output terminals of high-frequency signals, the power supply terminals of the amplifier circuits and the power supply terminals of the switch circuits being formed on one main surface of the laminate substrate; power supply lines each having one end connected to each of the power supply terminals of the amplifier circuits and power supply lines each having one end connected to each of the power supply terminals of the switch circuits being formed on one dielectric layer to constitute a power supply line layer; a first ground electrode being arranged on the side of the main surface with respect to the power supply line layer, the first ground electrode overlapping at least part of the power supply lines in a lamination di
    Type: Application
    Filed: December 27, 2007
    Publication date: March 11, 2010
    Applicant: HITACHI METALS, LTD.
    Inventors: Shigeru Kemmochi, Keisuke Fukamachi, Kazuhiro Hagiwara
  • Patent number: 7675989
    Abstract: An apparatus for estimating an antenna weight vector in an Orthogonal Frequency Division Multiple Access System (OFDMA) having a smart antenna. The apparatus includes receiving and storing training symbols in the time domain transmitted to estimate an antenna weight vector during a training symbol transmission interval; estimating carrier frequency offsets using training symbols in the frequency domain that are obtained by performing a Fast Fourier Transformation (FFT) algorithm with respect to the training symbols received during the training symbol transmission interval; compensating the stored training symbols in the time domain based on the estimated carrier frequency offsets; and estimating an antenna weight vector using training symbols in the frequency domain that are obtained by applying an FFT algorithm with respect to the training symbols in the time domain derived by compensating the carrier frequency offsets during the training symbol transmission interval.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: March 9, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Young Ahn, Yong-Soo Cho, Dong-Han Kim
  • Publication number: 20100022203
    Abstract: An integrated electronic radio-frequency transceiver circuit, including: at least one terminal intended to receive a signal to be transmitted or to transmit a received signal; at least one planar antenna, with a settable resonance frequency; at least one bidirectional coupler having a primary line interposed between the terminal and the antenna and having the respective terminals of a secondary line providing data representative of the transmitted power and of the power reflected on the primary line side; at least one detector of the transmitted power and of the reflected power; and a circuit for selecting the resonance frequency of the antenna according to the ratio between the transmitted power and the reflected power.
    Type: Application
    Filed: March 5, 2009
    Publication date: January 28, 2010
    Applicant: STMicroelectronics (Tours) SAS
    Inventors: Benoît BONNET, François DUPONT
  • Patent number: 7653361
    Abstract: A dual band WLAN (Wireless Local Area Network) communications technique is provided where a frequency synthesizer unit generates an LO (Local Oscillator) signal at a frequency between both frequency bands and two downconversion units and/or two upconversion units are provided. One of the units performs conversion between the LO signal and an IF (Intermediate Frequency) signal while the other conversion takes place between the IF signal and a zero-IF or low-IF signal. Signal processing is performed on the zero-IF or low-IF signal.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: January 26, 2010
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Wolfram Kluge, Sascha Beyer, Jeannette Zarbock
  • Patent number: 7653412
    Abstract: A wireless communication device is provided. The device comprises a digital circuit, an analog circuit, and a control circuit. The digital circuit is arranged to perform digital processing in a signal path. The analog circuit is arranged to perform analog processing in the signal path. The control circuit is arranged to receive control signals as input and arranged to provide output control signals for the analog circuit.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: January 26, 2010
    Assignee: IMEC
    Inventor: Wolfgang Eberle
  • Patent number: 7653359
    Abstract: Various embodiments are disclosed relating to techniques to reduce spurs in wireless transceivers. In an example embodiment, a first fractional-N divide ratio for a first frequency synthesizer may be set based on a selected channel. A second fractional-N divide ratio for a second frequency synthesizer may be set to a fixed value independent of the selected channel. The second fractional-N divide ratio may be set to a value that is sufficiently distant from an integer value so as to decrease the likelihood of at least some type(s) of spurs.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: January 26, 2010
    Assignee: Broadcom Corporation
    Inventor: Hooman Darabi
  • Publication number: 20090325511
    Abstract: The embodiment provides a radio frequency sensor system comprising a radio frequency transmission terminal and a radio frequency reception terminal. The system comprises an oscillating circuit part for generating a plurality of frequency clocks, a signal coupler for coupling signals exiting on the radio frequency reception terminal, a signal detector for detecting change of the coupled signal according to movement of an object and generating a detection signal, and a controller for analyzing the detection signal and differentially employing the frequency clock according to the analysis result.
    Type: Application
    Filed: September 19, 2007
    Publication date: December 31, 2009
    Inventor: Nam Yun Kim
  • Publication number: 20090318095
    Abstract: An apparatus, method, and system for DC offset cancellation are provided herein. For instance, the apparatus can include a first commutating mixer switch and a second commutating mixer switch. The first commutating mixer switch can have a first input port configured to receive a first differential signal and a first differential output port. The second commutating mixer switch can have a second input port configured to receive a second differential offset signal and a second differential output port. The first and second differential output ports can be coupled to one another to provide a combined differential output signal.
    Type: Application
    Filed: August 20, 2009
    Publication date: December 24, 2009
    Applicant: Broadcom Corporation
    Inventor: Tzi-Hsiung SHU
  • Publication number: 20090305649
    Abstract: A control circuit may be provided. In this case, an output of the control circuit is connected to a control input of a signal generator. Depending on internal signals which identify an operating state of a signal processing device, the control circuit generates a regulating signal at the output. The operating point of the signal generator is thereby set in such a way that a current consumption of the signal processing device is reduced, so that the signal quality is ensured in a sufficient manner.
    Type: Application
    Filed: August 18, 2009
    Publication date: December 10, 2009
    Inventors: Christian Münker, Bernd-Ulrich Klepser
  • Patent number: 7623894
    Abstract: A cellular mobile station including a modem processor and memory. The memory includes instructions for the modem processor to perform layer 1 processor operations, layer 2 processor operations, and layer 3 processor operations. The modem processor executes the instructions to perform processor operations for the cellular mobile station to communication data as per a cellular communications protocol. In one example, the mobile station includes different levels of memory to provide different deterministic access times.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: November 24, 2009
    Assignee: Freescale Semiconductor, Inc.
    Inventors: John J. Vaglica, Christopher K. Y. Chun, Jose G. Corleto-Mena, Arnaldo R. Cruz, Jianping Tao, Mieu V. Vu, Mark E. Elledge, Charbel Khawand, Arthur M. Goldberg, David J. Hayes
  • Patent number: 7590397
    Abstract: An IC chip allows first communication for performing communication with all of the other IC chips, and second communication for performing communication while restricting communication parties. That is to say, the IC chip performs sending/receiving signals with a new communication arrangement with both the first communication which is a broadcasting arrangement and the second communication which is a communicatory arrangement. This enables the function upgrading electronic equipment to be performed easily, and enables flexible signal processing with a new communication arrangement.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: September 15, 2009
    Assignee: Sony Corporation
    Inventors: Tetsujiro Kondo, Takashi Nakanishi
  • Patent number: 7580684
    Abstract: A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the radio transceiver being programmable and configurable for multiple radio frequency bands and standards and being capable of connecting to many networks and service providers. The RFIC includes a tunable resonant circuit that includes a transmission line having an inductance, a plurality of switchable capacitors configured to be switched into and out of the tunable resonant circuit in response to a first control signal, and at least one variable capacitor that can be varied in response to a second control signal, wherein a center resonant frequency of the resonant circuit is electronically tunable responsive to the first and second control signals that control a first capacitance value of the plurality of switchable capacitors and a second capacitance value of the at least one variable capacitor.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: August 25, 2009
    Assignee: BitWave Semiconductor, Inc.
    Inventors: Russell J. Cyr, Geoffrey C. Dawe
  • Patent number: 7565116
    Abstract: A high frequency module comprises a layered substrate. Inside the layered substrate, a reception diplexer for processing reception signals and a transmission diplexer for processing transmission signals are provided. The reception diplexer and the transmission diplexer are located in two different regions inside the layered substrate. A conductor portion that is connected to the ground and that electromagnetically separates the reception diplexer and the transmission diplexer from each other is provided between the two regions inside the layered substrate. The conductor portion is formed by using a plurality of through holes.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: July 21, 2009
    Assignee: TDK Corporation
    Inventors: Yuichiro Okuyama, Hideya Matsubara, Shinya Nakai, Masashi Iwata
  • Patent number: 7561852
    Abstract: An integrated multimode radio includes a multimode receiver and a multimode transmitter. The multimode receiver includes a shared receiver front-end, a receiver multiplexor, and a plurality of receiver IF stages. The multimode transmitter includes a shared transmitter front-end, a transmitter multiplexor, and a plurality of transmitter IF stages.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: July 14, 2009
    Assignee: Broadcom Corporation
    Inventors: Hooman Darabi, Brima Ibrahim, Ahmadreza Rofougaran
  • Publication number: 20090156138
    Abstract: There is provided one exemplary array antenna system having a plurality of arrayed element antennas and transmit/receive modules that are respectively connected with those element antennas and that apply a predetermined phase shift amount to transmitting signals to be supplied to the element antennas and to received signals received by the element antennas, wherein the transmit/receive module has one transmitting path that is connected to first and second element antennas and that amplifies and distributes the transmitting signal to the first and second element antennas after applying a predetermined transmitting phase shift amount and two receiving paths that amplify and apply respectively a receiving phase shift amount to the received signals received from the first and second element antennas.
    Type: Application
    Filed: November 26, 2008
    Publication date: June 18, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kazuhiro KANTO, Haruo Kojima, Tooru Tanaka
  • Patent number: 7546092
    Abstract: A transceiver according to the invention has application to a baggage handling system, amongst others, and includes an electrical circuit having a modulated series resistor, in the form of resistor R(modulator). Also included is a parallel switch SW1, which is placed between the antenna and a storage capacitor in the AC part of the circuit. In other embodiments the modulated series resistor, again in the form of resistor R(modulator) and parallel switch SW1, is placed between the antenna and the storage capacitor in the DC part of the circuit. Both circuits produce the same transmitted signal, although in practice the latter is simpler to implement due to its DC operating bias. In still further embodiments a modulated series resistor is placed between the antenna and the antenna's tuning capacitor.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: June 9, 2009
    Assignee: Magellan Technology Pty Limited
    Inventor: Graham Murdoch
  • Patent number: 7542731
    Abstract: Provided is a radio frequency transceiver. The radio frequency transceiver includes: a receiving unit for converting a radio frequency signal received by an antenna into an intermediate signal based on an intermediate local signal; a transmitting unit for converting an intermediate signal into a radio frequency signal based on a radio frequency local signal; and a local signal generating unit for generating the intermediate local signal and the radio frequency local signal.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: June 2, 2009
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Bong-Hyuk Park, Jong-Won Kim, Yong-Il Jun, Hyeong-Ho Lee
  • Patent number: 7522888
    Abstract: Architecture of future open wireless architecture (OWA) radio system supporting full integration of multi-bands, multi-standards wireless and mobile communication technologies with computer technology based on future open architecture platforms.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: April 21, 2009
    Inventor: Wei Lu
  • Publication number: 20090088086
    Abstract: A communication device may include one or more circuits in an integrated transmitter and receiver that includes a transmit path and a receive path. The transmit path may include an I processing baseband transmit path and a Q processing baseband transmit path. The receive path may include an I processing baseband receive path and a Q processing baseband receive path. The one or more circuits may enable sharing a first common filter by the I processing baseband transmit path and the I processing baseband receive path. The one or more circuits may also enable sharing a second common filter by the Q processing baseband transmit path and the Q processing baseband receive path. The first common filter and the second common filter are independently programmable to adjust a phase and/or a gain of the said first common filter, and/or a phase and/or a gain of the second common filter.
    Type: Application
    Filed: December 8, 2008
    Publication date: April 2, 2009
    Inventors: Iason Vassiliou, Nikos Haralabidis, Theodore Georgantas, Akira Yamanaka, Konstantinos Vavelidis, Sofoklis Plevridis
  • Patent number: 7499684
    Abstract: A technique to share a local oscillator signal between two radio frequency integrated circuits (RFICs). The local oscillator signal generated internally by one RFIC is ported to the other RFIC for use in transmit and/or receive operation. The local oscillator signal that is ported may be an RF local oscillator signal. Each RFIC may include a bi-directional port circuit that can be operated to make the RFIC a master, slave or may be totally disabled to disable the porting feature. This is particularly useful in RFICs that are used to communicate using MIMO radio algorithms which rely for optimum performance on phase and frequency coherency among a plurality of transmitters and a plurality of receivers.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: March 3, 2009
    Assignee: IPR Licensing, Inc.
    Inventor: Mark S. Cavin
  • Patent number: 7477879
    Abstract: A transceiver system including a common receiver and transmitter oscillator. The transceiver system may include transmitter circuitry, receiver circuitry, and a first oscillator. The first oscillator may provide a transmit frequency to a mixer in the transmitter circuitry to generate a transmitter RF signal. Furthermore, the first oscillator may also provide the transmit frequency to a first stage mixer in the receiver circuitry to down-convert a receiver RF signal from a receive frequency to an intermediate frequency (IF). The receiver circuitry may include a second oscillator and a second stage mixer. The second oscillator may provide an IF frequency to the second stage mixer to down-convert receiver signals at IF to a lower frequency. The receiver circuitry may filter out transmitter RF feedthrough signals without using a SAW filter. The transmitter circuitry, the receiver circuitry, and the first oscillator may be included in a single IC.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: January 13, 2009
    Assignee: Silicon Laboratories, Inc.
    Inventors: Ramkishore Ganti, Caiyi Wang
  • Publication number: 20090011720
    Abstract: When a power supply switch is turned on and an RF signal and an LO signal are input to a bipolar transistor, a mixed signal of both signals is output as an IF signal. When the power supply switch is turned off, the bipolar transistor operates as two diodes connected between a base terminal and an emitter terminal and between the base terminal and a collector terminal. When the IF signal and the LO signal are input, the input signals are mixed with each other by the diodes and the RF signal is output. Accordingly, one frequency conversion has a plus conversion gain and when bidirectional frequency conversion is performed by the use of one frequency converter, an external circuit such as a signal path switching switch is not necessary.
    Type: Application
    Filed: October 6, 2005
    Publication date: January 8, 2009
    Inventors: Yoshifumi Hosokawa, Michiaki Matsuo, Noriaki Saito
  • Publication number: 20080298375
    Abstract: Methods wireless communication terminals are disclosed that operate an ad-hoc wireless local area network. A network identifier and an application key are maintained within a first wireless communication terminal. The application key is defined for at least one application program hosted on the first wireless communication terminal. An ad-hoc wireless local area network is established between the first wireless communication terminal and a second wireless communication terminal using the network identifier and the application key.
    Type: Application
    Filed: June 4, 2007
    Publication date: December 4, 2008
    Inventors: Kare Andreas Agardh, Charles Liu