With A Common Signal Processing Stage Patents (Class 455/84)
  • Patent number: 8208869
    Abstract: A multi-function MMIC operated by a switch using an amplifier is disclosed. A switch may be configured by connecting an input or an output of a plurality of amplifiers, and an insertion loss may be reduced by selecting a transmission mode or a reception mode of an MMIC using the switch. A noise characteristic, a power characteristic, and a gain characteristic may also be improved.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: June 26, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jin Cheol Jeong, In Bok Yom
  • Publication number: 20120157013
    Abstract: A multi-band multi-path receiving and transmitting device and method, and a base station system are provided. The multi-band multi-path receiving and transmitting device includes a broadband antenna, at least two multi-frequency couplers, a multi-band transceiver, and a signal processing module. The multi-band transceiver is adopted to decrease the number of the transceivers, thereby reducing the material cost and the mounting cost of the base station system.
    Type: Application
    Filed: March 29, 2011
    Publication date: June 21, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wangjun Wu, Yulin Li, Fengqing Yan, Xiaodong Zhang, Xiwen Zhang
  • Publication number: 20120157012
    Abstract: An asymmetric gain communication device and the communication method thereof are provided. With at least one receiving antenna and a transmitting antenna with different antenna gains, the antenna gains of the receiving antennas being greater than the antenna gain of the transmitting antenna and different from each other, the invention detects the communication signals of the receiving antennas for recording communication quality thereof. The mechanism switches in real time to an appropriate receiving antenna according to the received communication quality. This mechanism optimizes the signal transmission distance and communication stability.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Applicant: Moxa Inc.
    Inventor: Hsin Hung Liu
  • Patent number: 8204451
    Abstract: A transceiver for use in a wireless device. The transceiver may include a receive portion for receiving an input RF signal. The receive portion may include at least one receive filter which may include a first filter. The transceiver may also include a transmit portion for transmitting an output RF signal. The transmit portion may include at least one transmit filter, which may include the first filter used in the receive portion. The transceiver may further include a plurality of switches, which may include a first switch coupled to an input of the first filter and a second switch coupled to an output of the first filter. The plurality of switches may be configurable to enable use of the first filter in the receive portion for receiving the input RF signal and use of the first filter in the transmit portion for transmitting the output RF signal.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: June 19, 2012
    Assignee: QUALCOMM Atheros, Inc.
    Inventors: Alireza Kheirkhahi, Hirad Samavati, Srenik Mehta, David Su, Brian Kaczynski
  • Publication number: 20120142287
    Abstract: According to one embodiment, an oscillator circuit includes a first comparator circuit, a second comparator circuit, a first voltage control circuit, a second voltage control circuit, a clock generation circuit. The first comparator circuit is configured to compare a first voltage with a first threshold voltage to generate a first comparison result. The second comparator circuit is configured to compare a second voltage with a second threshold voltage to generate a second comparison result. The first voltage control circuit is configured to decrease the first voltage by a first voltage value in synchronization with timing when the first comparison result changes. The second voltage control circuit is configured to decrease the second voltage by a second voltage value in synchronization with timing when the second comparison result changes.
    Type: Application
    Filed: September 13, 2011
    Publication date: June 7, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Shouhei Kousai
  • Publication number: 20120142288
    Abstract: A first device transmits a training signal with a fixed beam pattern, a second device receives the training signal while scanning a beam direction, and then it obtains first AWVs each having a main beam or sub-beam beam direction in an incoming direction in the second device. Next, the first device transmits a training signal while scanning a beam direction, the second device receives the training signal with a fixed beam pattern, and then it obtains second AWVs each having a main beam or sub-beam direction in an emitting direction in the first communication device. The roles of these two devices are interchanged and similar processes are performed in order to obtain third and fourth AWVs, and then one of first AWV combinations from first and second AWVs and one of second AWV combinations from third and fourth AWVs are used for wireless communication between these devices.
    Type: Application
    Filed: January 23, 2012
    Publication date: June 7, 2012
    Inventors: Kenichi Hosoya, Kenichi Maruhashi, Naoyuki Orihashi
  • Patent number: 8195223
    Abstract: The invention relates to a control module in telecommunications end devices, in particular in mobile telephones, that enables a two-way control of the mobile radio unit and the broadcast unit. Additionally, setting information from the entire system can also be transferred over control channels.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: June 5, 2012
    Assignee: T-Mobile International AG & Co. KG
    Inventor: Martin Bögelsack
  • Patent number: 8190103
    Abstract: A method of providing assistance for synchronization of a radio link in a communications network comprising at least a first network element, the method comprising the steps: making a decision to connect a user equipment to the first network element via a first radio link to transmit a signal discontinuously thereto; transmitting the signal continuously from the user equipment to the first network element via the first radio link; synchronizing the first radio link; and switching the user equipment to transmit the signal discontinuously after the first radio link is synchronized.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: May 29, 2012
    Assignee: Nokia Corporation
    Inventors: Jussi Jaatinen, Karri Rantaaho
  • Patent number: 8165190
    Abstract: A method for converting a sample rate in a Software Defined Radio (SDR) communication system is provided. The method includes setting a sampling frequency range depending on a maximum sampling frequency and a minimum sampling frequency so as to enable support of a plurality of sample rates; if a required sampling frequency is set, determining a control value for converting the maximum sampling frequency to the required sampling frequency; and receiving a signal having the maximum sampling frequency, and converting the signal having the maximum sampling frequency to a signal having the required sampling frequency depending on the control value. The control value is determined taking into account a maximum sampling frequency for setting the sampling frequency range.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: April 24, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-Chul Kim, Shi-Chang Rho
  • Publication number: 20120094618
    Abstract: A signal detection apparatus includes: a unit configured to select a particular detection target signal from among plural candidates of detection target signals; a unit configured to calculate a cyclic autocorrelation value at a center coordinate point specified by at least a cyclic parameter and a shift parameter of the particular detection target signal; a unit configured to calculate a cyclic autocorrelation value of each of (L?1) coordinate points belonging to a common area that is used commonly for different detection target signals; a unit configured to calculate a test statistic of the particular detection target signal; and a unit configured to determine presence or absence of the particular detection target signal according to a comparison result between the test statistic and a threshold, wherein the test statistic is calculated by using the cyclic autocorrelation value in each of the (L?1) coordinate points belonging to the common area.
    Type: Application
    Filed: October 13, 2011
    Publication date: April 19, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki HARADA, Hiromasa FUJII, Shunji MIURA
  • Patent number: 8160251
    Abstract: A system providing a scalable distributed operating environment is provided. The system may include a cryptographic module for encrypting communications for transmission over an external network. Further, more than one classified processor may be communicatively coupled to the cryptographic module for handling classified processes and information. In addition, more than one unclassified processor may also be communicatively coupled to the cryptographic module for handling unclassified processes and information. The number of classified and unclassified processors activated upon selection of a waveform is dependent upon the degree of complexity of the waveform.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: April 17, 2012
    Assignee: Rockwell Collins, Inc.
    Inventors: Steven E. Koenck, Allen P. Mass, Julianne R. Crosmer, James A. Marek, Carlen R. Welty
  • Patent number: 8160492
    Abstract: A wireless communication device having extremely simple constitution is used, and a low-cost and low power consumption wireless network system with high-quality signals is provided. The wireless network system comprises a plurality of wireless communication devices (101) each comprising a radiating oscillator (1) configured to integrate a transistor into a microwave oscillating resonator to generate a negative resistance and to commonly use a function of an antenna (11), an intermediate frequency signal generating section (4) and a receiving signal detecting section (7).
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: April 17, 2012
    Assignee: National Institute of Information and Communications Technology
    Inventors: Toshiaki Matsui, Hitoshi Utagawa
  • Patent number: 8155612
    Abstract: A wireless device that can process signals according to multiple wireless protocols simultaneously and without signal loss. The wireless device may comprise an antenna and first and second wireless protocol circuitry. The first wireless protocol circuitry comprises a shared gain element that amplifies signals that are processed by each of the first and second wireless protocol circuitry. Since the third signals are amplified by the shared gain element prior to being split out to the respective protocol circuitry, the first and second portions of the amplified third signals do not have significant signal loss relative to the third signals provided by the antenna. Thus the wireless device can receive and process wireless signals according to both the first and second protocols simultaneously without any significant signal losses due to splitting of the receive signal.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: April 10, 2012
    Assignee: Qualcomm Atheros, Inc.
    Inventors: Paul J. Husted, Srenik Mehta, Soner Ozgur
  • Patent number: 8145143
    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 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: July 14, 2010
    Date of Patent: March 27, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshifumi Hosokawa, Michiaki Matsuo, Noriaki Saito
  • Publication number: 20120071111
    Abstract: In accordance with embodiments of the present disclosure, a merged filter-transconductor-upconverter for use in a wireless communication device is provided.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 22, 2012
    Inventors: Omid Oliaei, Julian Aschieri
  • Publication number: 20120064844
    Abstract: According to one embodiment, a semiconductor integrated circuit includes a phase shifter, a plurality of phase matching detecting circuits, a output module. The phase shifter is configured to delay an input oscillation signal to generate a plurality of delay signals having phases different from each other. The plurality of phase matching detecting circuits is configured to store a second program for downloading a first program from an outside to the first area. The output module is configured to generate an output oscillation signal based on at least one of the delay signals having the phase difference determined to be within the predetermined range.
    Type: Application
    Filed: March 17, 2011
    Publication date: March 15, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Daisuke Miyashita, Jun Deguchi
  • Patent number: 8131316
    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 26, 2009
    Date of Patent: March 6, 2012
    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: 8112045
    Abstract: A Radio Frequency RF transmitter includes a translational loop architecture that supports non-constant envelope modulation types and includes by adjusting the envelope of the translational loop at the translational loop output. The RF transmitter includes an Intermediate Frequency (IF) modulator, a translational loop, an envelope time delay adjust block, an envelope adjust block, and a time delay calibration block. The IF modulator receives a modulated baseband signal and produces a modulated IF signal having a non-constant envelope. The translational loop receives the modulated IF signal and produces a modulated RF signal having a constant envelope. The envelope time delay adjust block receives an envelope signal corresponding to the original modulated signal and produces a time delayed envelope signal based upon a time delay control signal. The envelope adjust block adjusts the modulated RF signal based upon the time delayed envelope signal to produce an envelope adjusted modulated RF signal.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: February 7, 2012
    Assignee: Broadcom Corporation
    Inventors: Hong Shi, Henrik T. Jensen
  • Patent number: 8103222
    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: Grant
    Filed: September 19, 2007
    Date of Patent: January 24, 2012
    Assignee: LG Innotek Co., Ltd.
    Inventor: Nam Yun Kim
  • Patent number: 8099062
    Abstract: A complementary metal oxide semiconductor transceiver analog front end circuit includes a combined transmit and receive amplifier block that produces an amplified transmit differential signal and receives a receive differential signal through the same pair of input/output nodes coupled to an external network through an RF choke block. In one embodiment the combined transmit and receive amplifier block includes separate power amplifier and low noise amplifier circuits, while a second embodiment includes a power amplification stage and a combined power amplification/low noise amplification stage. The amplifier circuits may be constructed using a combination of thin oxide core transistors and thick oxide input/output transistors. DC feeds may be selected to power the circuits in response to a transmit/receive control signal. Bias voltages to the amplifier circuits' transistors may also be set in response to the transmit/receive control signal.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: January 17, 2012
    Assignee: Qualcomm Atheros, Inc.
    Inventor: Manolis Terrovitis
  • Patent number: 8099058
    Abstract: A method for operating an integrated transceiver, comprising coupling an operating transmitter and an operating receiver within the integrated wideband receiver, inputting a signal into the operating transmitter, performing a first conversion of the signal, wherein the signal is converted into a second signal, transmitting the second signal into the operating receiver, performing a second conversion of the signal, wherein the signal is converted into a third signal, transmitting the third signal into the operating transmitter, and adjusting the operating transmitter.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: January 17, 2012
    Assignee: Rockstar Bidco, LP
    Inventors: Bradley John Morris, Edward M. Sich
  • Patent number: 8095067
    Abstract: A frequency translating repeater (120) for use in a time division duplex (TDD) radio protocol communications system includes local oscillator (LO) circuits (210, 310, and 410) to facilitate repeating by providing isolation, reduced phase noise, reduced pulling, and the like. Tunable LOs (441, 442) can be directly coupled to down-converters (413, 414) and up-converters (426, 427) for increased isolation, reduced phase noise, less stringent frequency accuracy, and a reduced potential for pulling.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: January 10, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Kenneth M. Gainey, Kevin Negus, James C. Otto, James A. Proctor, Jr.
  • Patent number: 8090398
    Abstract: A low cost, a low power consumption and a small size are three very important factors for a mobile communication terminal. A great problem is posed by the conventional technique using a DSP and a CPU independent of each other which requires two external memory systems. Also, two peripheral units are required for data input and output of the DSP and CPU. As a result, an extraneous communication overhead occurs between the DSP and the CPU. The invention realizes a mobile communication terminal system by a DSP/CPU integrated chip comprising a DSP/CPU core (500) integrated as a single bus master, an integrated external bus interface (606) and an integrated peripheral circuit interface. The memory systems and the peripheral circuits of the DSP and the CPU can thus be integrated to realize a mobile communication terminal system low in cost and power consumption and small in size.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: January 3, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Tetsuya Nakagawa, Yuji Hatano, Yasuhiro Sagesaka, Toru Baji, Koki Noguchi
  • Publication number: 20110300814
    Abstract: A radio front end includes a power amplifier, a tone injection module, a duplexer, a balancing network, and a processing module. The tone injection module is operable, in a first mode, to produce a tone having a carrier frequency that is substantially similar to a carrier frequency of an inbound wireless signal. The duplexer is operable, in the first mode, to provide electrical isolation between the outbound wireless signal and a combination signal of the tone and inbound wireless signal and is operable, in a second mode, to provide electrical isolation between the outbound wireless signal and the inbound wireless signal. The processing module is operable to determine an amplitude of a tone component of the combination signal; correlate the amplitude of the tone component to an inbound frequency band isolation; and adjust baseband processing of a down converted representation of the combination signal based on the inbound frequency band isolation.
    Type: Application
    Filed: November 15, 2010
    Publication date: December 8, 2011
    Applicant: Broadcom Corporation
    Inventors: Mohyee Mikhemar, Hooman Darabi
  • Patent number: 8064949
    Abstract: Frequency conversion methods and systems for Bluetooth and FM radio communication are provided. FM data may be received and/or transmitted via the FM radio and Bluetooth data may be received and/or transmitted via the Bluetooth radio. With an integration of frequency conversion for Bluetooth and FM, both systems can operate from a single frequency source, thereby reducing part count and power consumption. Communication between Bluetooth and FM channels may be enabled via a single chip.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: November 22, 2011
    Inventor: Ahmadreza Rofougaran
  • Publication number: 20110273274
    Abstract: A transceiver is provided. The transceiver includes a transmission portion which generates a transmission signal; an antenna which transmits the transmission signal and receives a reception signal; a signal division element which receives the transmission signal from the transmission portion and inputs the received transmission signal to the antenna for transmission, and receives the reception signal received by the antenna; an extraction signal adjusting portion which extracts the transmission signal from the signal division element, and adjusts a phase of the extracted signal to generate an output signal; and a receiving portion which receives the reception signal from the signal division element, and applies the output signal from the extraction signal adjusting portion to the reception signal.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 10, 2011
    Applicants: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION, SAMSUNG TECHWIN CO., LTD.
    Inventors: Sung-chan JUNG, Su-kyum KIM, Youngoo YANG
  • Patent number: 8055219
    Abstract: A first value of an operational center frequency of a signal to transmit is determined according to received user input. The operational center frequency is centered within a first band of frequencies and the first band of frequencies has a first bandwidth. A single loop antenna is tuned to match the first value of the center frequency and the single loop antenna is arranged and configured to operate across a second band of frequencies having a second bandwidth. The first bandwidth is less than the second bandwidth. The signal is transmitted from the single loop antenna according to the first value of the operational center frequency to provide a transmitted signal.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: November 8, 2011
    Assignee: The Chamberlain Group, Inc.
    Inventors: Jeremy E. Jenkins, Dilip Patel
  • Patent number: 8036607
    Abstract: In a case where a switching source wireless communication system is a wireless communication system in which a transmission timing of a packet or data rate can be controlled in a wireless base station, the switching source wireless communication system, which notifies information on a timing when a wireless terminal communicates the switching destination wireless communication system with respect to the switching source wireless communication system in advance, starts time-division communication between switching destination and switching source wireless communication systems, and receives the timing information, controls a transmission timing or a data rate in accordance with the timing information.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: October 11, 2011
    Assignee: Hitachi Communication Technologies, Ltd.
    Inventors: Shiro Mazawa, Michio Iguchi, Takanori Moritomo, Masao Hayama
  • Patent number: 8023913
    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: January 11, 2011
    Date of Patent: September 20, 2011
    Assignee: IPR Licensing, Inc.
    Inventor: Mark S. Cavin
  • Publication number: 20110223872
    Abstract: A wireless transceiving apparatus is adapted for transceiving data between communication terminals and signal processing devices and includes transceiving devices. Each transceiving device includes: a number (M) of antenna units each including a number (T) of antenna elements; a number (M) of first processing unit for performing radio frequency (RF) beamforming; a number (M) of frequency converters; and a second processing unit for performing baseband beamforming. The wireless transceiving apparatus receives signals from the communication terminals and transmits processed signals to the communication terminals with an improved signal to interference plus noise ratio (SINR), thereby ensuring the quality of service for each communication terminal.
    Type: Application
    Filed: December 7, 2010
    Publication date: September 15, 2011
    Applicant: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Sau-Hsuan WU, Lin-Kai Chiu, Ko-Yen Lin
  • Publication number: 20110183634
    Abstract: A mobile station communicates with an access point (AP). The mobile station includes a low noise amplifier (LNA) path, a power amplifier (PA) path, a switch to select the LNA path or the PA path, and a controller directing the switch. The controller estimates amplifying power of the LNA, transmitting power and a sensitivity threshold of the PA. The controller receives a current received signal strength indication (RSSI) value of the AP. The controller determines whether amplifying power of the LNA path exceeds the PA sensitivity threshold. The controller transmits a selection signal directing the switch to select the LNA path if the amplifying power of the LNA path exceeds the sensitivity threshold of the PA.
    Type: Application
    Filed: April 30, 2010
    Publication date: July 28, 2011
    Applicants: AMBIT MICROSYSTEMS (SHANGHAI) LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: GUO-ZHI DING, XU LIU, TENG-HUEI CHU
  • Publication number: 20110165849
    Abstract: A front end circuit for coupling an antenna to a radio frequency (RF) transceiver is disclosed. An antenna port connectible to the antenna is provided, as well as a power amplifier coupled to a signal output of the RF transceiver and a low noise amplifier coupled to the signal input of the RF transceiver. The front end circuit includes a switching network that is connected to the antenna port, the power amplifier, and the low noise amplifier. Additionally, there is at least one resonant circuit and a control circuit coupled to a receive enable line of the transceiver. This resonant circuit defines a parallel resonance with a first resonant resistance in the operating frequency band upon activation in the receive mode. The resonant circuit also defines a substantially high transistor impedance upon deactivation in the transmit mode.
    Type: Application
    Filed: December 29, 2010
    Publication date: July 7, 2011
    Inventor: OLEKSANDR GORBACHOV
  • Patent number: 7974587
    Abstract: A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric substrate formed within a board, for example, a printed circuit board. In another embodiment of the invention, the wave guide is formed within a die of an integrated circuit radio transceiver. A plurality of transceivers with different functionality is defined. Substrate transceivers are operable to transmit through the wave guides, while local transceivers are operable to produce very short range wireless transmissions through space. A third and final transceiver is a typical wireless transceiver for communication with remote (non-local to the device) transceivers.
    Type: Grant
    Filed: December 30, 2006
    Date of Patent: July 5, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20110147465
    Abstract: An RFID device includes an amplification unit, a demodulator, and a modulator. The amplification unit is configured to amplify a level of a radio signal applied through an antenna, and output an amplification signal. The demodulator is configured to generate an operating voltage by rectifying and amplifying the amplification signal, demodulate the operating voltage, and generate a command signal. The modulator is configured to output a response signal, which corresponds to the command signal, to the antenna.
    Type: Application
    Filed: June 2, 2010
    Publication date: June 23, 2011
    Applicant: Hynix Semiconductor Inc.
    Inventor: Hee Bok KANG
  • Publication number: 20110148596
    Abstract: A radio frequency identification (RFID) device includes: a first amplifier configured to amplify a level of a first radio signal applied through a first antenna, and output an amplified signal; a second amplifier configured to amplify the amplified signal to a predetermined level, and output a power signal; a demodulator configured to demodulate the amplified signal and generate a command signal; a transmission switch configured to selectively output the power signal according to a response signal corresponding to the command signal; and a modulator configured to output a second radio signal, which is generated by modulating the power signal, to a second antenna.
    Type: Application
    Filed: June 2, 2010
    Publication date: June 23, 2011
    Applicant: Hynix Semiconductor Inc.
    Inventor: Hee Bok KANG
  • Publication number: 20110151805
    Abstract: A coupler which is connectable to a feeder circuit of a wireless communication device is provided. The coupler includes a conductive element, a short circuit portion, a feeder portion and grounded plate. The conductive element has a substantially plane face. The short circuit portion is provided to the conductive element. The short circuit portion is positioned closer to a geometric gravity center of the conductive element than to an outer fringe of the face of the conductive element. The feeder portion is provided to the conductive element. The feeder portion is positioned separately from the short circuit portion. The feeder portion electrically connects the conductive element to the feeder circuit. The grounded plate is short-circuited to the conductive element via the short circuit portion.
    Type: Application
    Filed: May 26, 2010
    Publication date: June 23, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kouji Hayashi, Hiroyuki Hotta
  • Patent number: 7953376
    Abstract: A method of providing assistance for synchronization of a radio link in a communications network comprising at least a first network element, the method comprising the steps: making a decision to connect a user equipment to the first network element via a first radio link to transmit a signal discontinuously thereto; transmitting the signal continuously from the user equipment to the first network element via the first radio link; synchronizing the first radio link; and switching the user equipment to transmit the signal discontinuously after the first radio link is synchronized.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: May 31, 2011
    Assignee: Nokia Corporation
    Inventors: Jussi Jaatinen, Karri Rantaaho
  • Patent number: 7949311
    Abstract: An RF integrated circuit (IC) includes a first IC port for coupling a first transmit signal in a first frequency band to at least one external device and a second IC port for coupling a second transmit signal in a second frequency band to the at least one external device. A transmitter module responds to outbound data to generate the first transmit signal in a first mode of operation and to generate the second transmit signal in a second mode of operation, wherein the transmitter module generates the first transmit signal and the second transmit signal in a selected one of a plurality of wireless telephony formats based on a control signal, and wherein the plurality of wireless telephony formats includes a code divisional multiple access format and at least one non-code division multiple access format.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: May 24, 2011
    Assignee: Broadcom Corporation
    Inventors: Theodoros Georgantas, Konstantinos D. Vavelidis, Sofoklis Plevridis, Ilias Bouras
  • Patent number: 7937061
    Abstract: A signal interfacing technique for connecting signals between a signal processing device and a MIMO radio integrated circuit (IC) involving multiplexing two or more signals on a connection pin between the radio IC and a signal processing device. According to one technique, transmit and receive signals are multiplexed such that during a transmit mode a transmit signal is coupled on the connection pin from the signal processing device to the radio IC, and during a receive mode a receive signal is coupled from the radio IC on the connection pin to the signal processing device. According to another technique, in-phase (I) and quadrature (Q) signals are multiplexed on a connection pin during both transmit and receive modes.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: May 3, 2011
    Assignee: IPR Licensing, Inc.
    Inventors: Gary L. Sugar, Robert M. Masucci, Michael F. Toner
  • Patent number: 7933319
    Abstract: A signal processing system is disclosed. The system includes: a first synthesizer and a second synthesizer, for respectively generating a first frequency and a second frequency; a first RF circuit; a first analog front end (AFE); a second RF circuit; and a second AFE, wherein the first RF circuit and the first AFE can support a signal transmission of a first bandwidth, the second RF circuit and the second AFE can support a signal transmission of a second bandwidth, a central frequency of the first bandwidth is substantially equal to the first frequency, and a central frequency of the second bandwidth is substantially equal to the second frequency.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: April 26, 2011
    Assignee: Realtek Semiconductor Corp.
    Inventors: Kuang-Yu Yen, Chung-Yao Chang
  • Patent number: 7929917
    Abstract: A method for operating an integrated transceiver, comprising coupling an operating transmitter and an operating receiver within the integrated wideband receiver, inputting a signal into the operating transmitter, performing a first conversion of the signal, wherein the signal is converted into a second signal, transmitting the second signal into the operating receiver, performing a second conversion of the signal, wherein the signal is converted into a third signal, transmitting the third signal into the operating transmitter, and adjusting the operating transmitter.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: April 19, 2011
    Assignee: Nortel Networks Limited
    Inventors: Bradley John Morris, Edward M. Sich
  • Publication number: 20110081874
    Abstract: A signal transceiving circuit, comprising: a receiver, for receiving a input signal; a transmitter, for transmitting an output signal; and a resistance circuit, for omitting the noise caused by the output signal to the input signal. The resistance circuit comprises: a voltage transferring circuit, for generating a voltage transferred signal, and a voltage dividing circuit, for voltage dividing the voltage transferred signal and the output signal, such that the voltage generated at the receiver is cancelled by the voltage generated by the voltage transferred signal at the transceiver. A noise reduction circuit that can be utilized in this signal transceiving circuit is also disclosed.
    Type: Application
    Filed: October 1, 2010
    Publication date: April 7, 2011
    Inventor: Ming-Cheng Chiang
  • Patent number: 7920900
    Abstract: A scheme for sharing antenna control pins in a wireless communications device implemented on a single CMOS integrated circuit is described. By providing a routing circuit for coupling the antenna control signal to the appropriate transceiver circuitry in a multi-transceiver system, antenna control signals may be efficiently processed using a minimum of pins on the wireless communication device.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: April 5, 2011
    Assignee: Broadcom Corporation
    Inventors: Greg H. Efland, David Fifield
  • Patent number: 7916672
    Abstract: The present invention pertains to a method of calibrating reception properties of a radio frequency (RF) processor. The application describes two embodiments of the invention representing calibration of the properties using an auxiliary transmitter to generate a calibration signal internal to the RF processor.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: March 29, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Imtinan Elahi, Khurram Muhammad
  • Publication number: 20110065397
    Abstract: According to one embodiment, an information processing apparatus includes a main body, a display unit rotatably attached to the main body via a coupling portion, first and second antennas provided in the display unit, a first mixing/distributing device provided in the display unit, first and second wireless communication modules provided in the main body, and a second mixing/distributing device provided in the main body. The signal transmission/reception between the first mixing/distributing device in the display unit and the second mixing/distributing device in the main body is executed via a cable which is inserted in the coupling portion.
    Type: Application
    Filed: November 18, 2010
    Publication date: March 17, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Anwar Sathath
  • Patent number: 7907660
    Abstract: A modem for use with a computer having a demodulator and a decoder, the modem comprises a hardware interface; a demodulator front-end having a first input and a first output, the first output of the demodulator front-end being configured to interface with the demodulator of the computer and to provide a demodulated front-end signal to the demodulator over the hardware interface; and a forward error correction (FEC) unit having a second input and a second output, the second input of the FEC unit being configured to interface with the demodulator of the computer and to receive a demodulated signal from the demodulator over the hardware interface, the demodulated signal being a demodulation of the demodulated front-end signal, and the second output of the FEC unit being configured to interface with the decoder of the computer and to provide an FEC signal to the decoder over the hardware interface.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: March 15, 2011
    Assignee: Conexant Systems, Inc.
    Inventor: Chi-Ping Nee
  • Patent number: 7904032
    Abstract: Systems and techniques for RFID communication using a frequency shift between uplink and downlink carrier frequencies achieved by digital processing of a baseband signal before radio frequency modulation of a carrier signal occurs. Generation of the carrier signal, and modulation of the carrier signal, is accomplished using digital techniques. A digital representation of a baseband signal is modulated to create a complex baseband signal multiplied by a negative frequency shift equal to a difference between downlink and uplink carrier frequencies. This signal undergoes analog to digital conversion and modulation by a carrier signal at an uplink frequency. The complex baseband signal includes in-phase and quadrature components. During uplink communication, the in-phase component of the complex baseband signal is replaced by a constant value. The quadrature component is replaced by a zero signal. During uplink communication, therefore, an umodulated carrier signal at an uplink frequency is generated.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 8, 2011
    Assignee: NCR Corporation
    Inventor: Albert M. G. Claessen
  • Patent number: 7890078
    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: January 25, 2010
    Date of Patent: February 15, 2011
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Wolfram Kluge, Sascha Beyer, Jeannette Zarbock
  • Patent number: 7890064
    Abstract: A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric substrate formed within a board, for example, a printed circuit board. In another embodiment of the invention, the wave guide is formed within a die of an integrated circuit radio transceiver. A plurality of transceivers with different functionality is defined. Substrate transceivers are operable to transmit through the wave guides, while local transceivers are operable to produce very short range wireless transmissions through space. A third and final transceiver is a typical wireless transceiver for communication with remote (non-local to the device) transceivers.
    Type: Grant
    Filed: December 30, 2006
    Date of Patent: February 15, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7885614
    Abstract: An antenna switch (31) that is arranged to alternately operate in a receive mode and a transmit mode, comprises adaptive filter (30). Herewith, signal processing means (Rx1, Rx2 and Rx3) can be coupled to an antenna (1) during the receive mode and be insulated from the antenna during the transmit mode.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: February 8, 2011
    Assignee: NXP B.V.
    Inventor: Pieter Willem Jedeloo