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With transmitter-receiver switching or interaction prevention

Subclass of:

455 - Telecommunications

455073000 - TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER)

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
455083000 Single antenna switched between transmitter and receiver 54
455079000 Automatic (e.g., voice operated) 22
Entries
DocumentTitleDate
20110195673INTEGRATED CIRCUITS, COMMUNICATION UNITS AND METHODS OF CANCELLATION OF INTERMODULATION DISTORTION - A wireless communication unit includes a transmitter, a receiver, a selectivity element and a baseband processing module. The receiver has at least one summation module arranged to add a cancellation signal to the quadrature baseband receive signal. a baseband processing module arranged to: receive the quadrature baseband transmit signal and quadrature baseband receive signal; apply independent gain and phase adjustments to quadrature portions of the quadrature baseband transmit signal, based on at least one signal component of the quadrature baseband receive signal, to form independent cancellation signals; and apply the independent cancellation signals to the at least one summation module.08-11-2011
20110195672INTEGRATED CIRCUITS, COMMUNICATION UNITS AND METHODS OF CANCELLATION OF INTERMODULATION DISTORTION - A wireless communication unit includes a transmitter for processing a baseband transmit signal to produce a first radio frequency signal. A receiver is arranged to convert a second radio frequency signal to a baseband receive signal, where the receiver has a summation module arranged to add a cancellation signal to the baseband receive signal. A selectivity element is arranged to couple the transmitter and the receiver to an antenna, where a reduced portion of the first radio frequency signal is introduced into the second radio frequency signal thereby creating a second order inter-modulation distortion component in the baseband receive signal. An adaptive estimator module has a filter for filtering the baseband receive signal to remove dc offsets associated with the second order inter-modulation distortion component and generate the cancellation signal based on the baseband transmit signal and the filtered baseband receive signal for inputting to the summation module.08-11-2011
20130045695TRANSMITTING AND RECEIVING RADIO SIGNALS IN VARIOUS FREQUENCY RANGES - A device transmits and receives radio signals, in particular radio signals in a cellular radio network. The device contains a first transmitting antenna for transmitting radio signals and a second receiving antenna. The antennas transmit and/or receive radio signals in different frequency ranges. The antennas are connected to a common cable connection via a radio signal splitter, by which cable connection the device can be connected to a radio terminal. The device contains a first radio signal amplifier disposed in a first radio signal path and/or a second radio signal amplifier disposed in a second radio signal path. The transmitting antenna and the receiving antenna have attenuation with respect to feedback of a radio signal transmitted from the transmitting antenna to the receiving antenna due to the arrangement thereof relative to each other and due to the transmitting and/or receiving characteristics thereof.02-21-2013
20100069020SEMICONDUCTOR INTEGRATED CIRCUIT, RF MODULE USING THE SAME, AND RADIO COMMUNICATION TERMINAL DEVICE USING THE SAME - One high-frequency switch Qm supplied with transmit and receive signals to ON, and another high-frequency switch Qn supplied with a signal of another system to OFF are controlled. In the other high-frequency switch Qn, to set V-I characteristics of near-I/O gate resistances Rg03-18-2010
20100075617METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL IN A COMMUNICATION SYSTEM - A method and an apparatus for transmitting and receiving a signal in a communication system are provided. The method includes transmitting a signal to a receiver through one of the antennas, receiving an antenna switching indicator indicating to switch the transmitting antenna from the receiver, and switching the transmitting antenna according to the antenna switching indicator, and transmitting a signal to the receiver through a switched antenna.03-25-2010
20120244821RADIO COMMUNICATION APPARATUS - A communication apparatus includes a radio portion (09-27-2012
20130078931Transmit-Receive Front End - The present invention discloses a transmit-receive (TR) front end. The TR front end includes a low-noise amplifier (LNA); a power amplifier (PA); a transformer, coupled to the PA, for increasing a voltage swing and a power transmission of the PA; and a TR switch, coupled between the transformer and the LNA. The LNA is single ended and there is no transformer between the LNA and the TR switch.03-28-2013
20130040582WIRELESS COMMUNICATION DEVICE, HIGH-FREQUENCY CIRCUIT SYSTEM, AND LOCAL LEAK REDUCTION METHOD - A wireless communication device according to the present invention includes high-frequency circuits 02-14-2013
20130035046WIRELESS COMMUNICATION APPARATUS AND ELECTRONIC EQUIPMENT - Provided is a wireless communication apparatus including at least one two-way antenna for power recovery, a wireless block processing a wireless signal which the two-way antenna for power recovery transmits and receives, a power recovery block recovering electric power from a received signal of the two-way antenna for power recovery, and a connection switching part connecting the two-way antenna for power recovery to and switching the connection between the wireless block and the power recovery block. A duty ratio at which the connection switching part connects the two-way antenna for power recovery to the wireless block and the power recovery block is set so that the wireless block attains a desired communication speed.02-07-2013
20100022202TRANSCEIVER REDUNDANCY IN AN ELECTRONIC TOLL COLLECTION SYSTEM - An electronic toll collection system wherein the reader includes a switching network and a plurality of transceivers operating under the control of a controller. The reader further includes failure detection circuitry for determining whether any of the transceivers have failed based upon the RF outputs of the transceivers. If the controller determines that a transceiver has failed, then it alters the switching pattern such that the switching network excludes the failed transceiver from being connected to the antennas. The reader thereby provides for adaptive RF channel assignment, as the particular transceiver used to excite a particular antenna may be dynamically altered, and the provision of at least two transceivers in the reader ensures transceiver redundancy.01-28-2010
20090124214REMOTE FRONT-END FOR A MULTI-ANTENNA STATION - A multi-antenna station has multiple remote front-ends coupled to multiple antennas. Each remote front-end includes a power amplifier (PA), a low noise amplifier (LNA), and first and second coupling units. On the transmit path, a first RF signal is received via a first port, routed by the first coupling unit to the power amplifier, amplified to obtain the desired output power level, and routed by the second coupling unit to a second port for transmission via the antenna. On the receive path, a second RF signal is received via the second port, routed by the second coupling unit to the LNA, amplified to obtain a higher signal level, and routed by the first coupling unit to the first port for transmission to the transceiver.05-14-2009
20130052968REDUCED CLOCK FEED-THROUGH SYSTEMS, METHODS AND APPARATUS - Implementations of radio frequency switch controllers within the scope of the appended claims are configured to reduce the impact of the clock signal induced spurs. In particular, implementations of switch controllers described herein include a poly-phase clocking scheme, as opposed to a single phase to clock the charge pump stages of an negative voltage generator. In some implementations poly-phase clocking schemes reduce the clock signal induced spurs and may preclude the need for additional on-chip or off-chip decoupling capacitors that add to the cost and physical size of a complete front end module solution.02-28-2013
20090305648SELF-CALIBRATING MIXER - Mixer circuits (12-10-2009
20130072134ATTENUATING ANTENNA SWITCH AND COMMUNICATION DEVICE - An attenuating antenna switch may be used to suppress increase in the scale and power consumption of an RFIC. The antenna switch has a first terminal, a second terminal, and an antenna terminal coupled to the first and second terminals and configured to be connected to an antenna. The first switch switches between a first state in which a high frequency signal is propagated between the first terminal and the antenna terminal, and a second state in which the high frequency signal is interrupted. A second switch switches between the first and second states between the second terminal and the antenna terminal. The first and second switches are controlled in a mutually exclusive manner such that only one of the two switches can be in the first state at any given time. When in the first state, each switch adjusts an attenuation amount of the high frequency signal.03-21-2013
20130059551ROUTING FOR A PACKAGE ANTENNA - An apparatus is provided. A plurality of transceiver antennas are arranged to form a phased array, where each antenna include a differential transmit antenna and a differential receive antenna arranged in a first pattern. A plurality of transceivers are arranged in a second pattern that is substantially symmetrical, and each transceiver is associated with at least one of the transceiver antennas and includes a feed network. Each feed network has a power amplifier (PA), a first matching network that is coupled between the PA and its associated transmit antenna so as to translate the phase of each differential transmit signal, a low noise amplifier (LNA), and a second matching network that is coupled between the LNA and its associated receive antenna so as to translate the phase of each differential receive signal.03-07-2013
20130065542Spectral Filtering Systems - A spectral transform system includes a first path having a signal input, a signal output, and an adjustable first path signal scaling block. A second path is connected to the forward path between the signal input and the signal output. The second path has an adjustable delay element and an adjustable second path signal scaling block. A detector is connected to the signal output for detecting properties of an output signal. A controller is connected to adjust the delay element, the second path signal scaling block, and the first path signal scaling block based on the properties detected by the detector to achieve a desired output signal.03-14-2013
20110294443HIGH ISOLATION SWITCH WITH NOTCH FILTER - A switching method and apparatus that provides high isolation between circuit arms of a mobile communication device by attenuating noise over a defined frequency range using a switched shunt LC notch filter.12-01-2011
20080311862INTEGRATED GALVANIC ISOLATOR USING WIRELESS TRANSMISSION - An embodiment of a wireless galvanic isolator device is formed by a transmitter circuit, a receiver circuit, and a wireless coupling structure, arranged between the transmitter circuit and the receiver circuit. The wireless coupling structure is formed by a pair of antennas each arranged on an own die and integrated together with the respective transmitter and receiver circuit. The two dice may be arranged adjacent to each other in a planar configuration or arranged on top of each other and bonded together.12-18-2008
20100210223MULTI MODE RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH INTER-STAGE MATCHING CIRCUIT - A front end circuit for coupling an antenna to a first radio frequency (RF) transceiver and a second RF transceiver is contemplated. The RF transceivers have a signal input, a signal output, a receive enable line and a transmit enable line. In addition to an antenna port, the front end circuit has a first power amplifier and a first low noise amplifier both coupled to first RF transceiver, and a second power amplifier and a second low noise amplifier both coupled to the second RF transceiver. The front end circuit includes a matching network that couples the power amplifiers and the low noise amplifiers, the various outputs and inputs thereof being common.08-19-2010
20110300813MULTIPLE-PHASE FREQUENCY TRANSLATED FILTER - A frequency translation filter includes a baseband filter circuit, a clock generator, and a switching circuit. The baseband filter circuit is operable to provide a baseband filter response. The clock generator is operable to generate multiple-phase clock signals at a desired frequency. The switching circuit is operable to frequency translate the baseband filter response of the baseband filter circuit to a high frequency filter response in accordance with the multiple-phase clock signals.12-08-2011
20110143690METHOD AND SYSTEM FOR INTEGRATING TRANSMIT SWITCH FUNCTIONALITY IN A WLAN RADIO TRANSCEIVER - A radio transceiver is disclosed. The transceiver comprises an integrated circuit. The integrated circuit comprises a transmit path; a first switch coupled in series with the output of the transmit path; a receive path; and a second switch coupled as a shunt with the input of the receive path. The transceiver further comprises a plurality of external matching networks coupled to the transmit and receive paths of the integrated circuit to ensure minimal loading from one path to the other. The transceiver also comprises a shared balun for converting differential signals from the plurality of external matching networks to single ended signals; and an antenna to interface with the single ended signals. A method and system in accordance with an embodiment enables tying together the transmit path and the receive paths of a radio transceiver without the need for an external T/R switch. A method and system in accordance with an embodiment minimizes the loading effects between the transmit path and the receive path such that output power and NF noise figure are not degraded after tying the transmit path and the receive path together.06-16-2011
20120108184MOBILE TERMINAL AND COMMUNICATION METHOD - A mobile terminal may use an antenna unit of a second device to transmit and/or receive data. The mobile terminal may allow a second device to use its antenna unit to transmit and/or receive data. The mobile terminal may suspend control of its antenna unit if a second device is transmitting or receiving from the antenna unit. A communication method allows a mobile terminal to use the antenna unit of a second device to transmit and/or receive and the second terminal to use the antenna unit of the mobile terminal to transmit and/or receive.05-03-2012
20120015611APPARATUS FOR MINIMIZING AMPLIFER OSCILLATION IN ANTENNA SYSTEM - Embodiments of an apparatus for minimizing oscillation of an amplifier in an antenna system are provided. These embodiments can comprise passive circuitry in the form of a coupling simulator that includes passive elements selected and combined to generate an output with properties that can cancel or substantially reduce a coupled input as between two antennas in the antenna system. In one example, the coupling simulator may include a phase-shifting device and an attenuating device, each of which have properties with values selected based on parameters that result from the relationship between the antennas of the antenna system.01-19-2012
20090215406TRANSCEIVER STRUCTURE - The present invention relates to an integrated transceiver structure 08-27-2009
20110201284DC OFFSET CALIBRATION IN A DIRECT CONVERSION RECEIVER - A direct conversion receiver (08-18-2011
20110201283METHOD AND SYSTEM OF BEAMFORMING A BROADBAND SIGNAL THROUGH A MULTIPORT NETWORK - Aspects of a method and system for beamforming a broadband signal through a multiport network are provided. In this regard, a plurality of signals received via a plurality of antennas may be detected and a plurality of transmit signals may be generated, wherein a phase of at least one of the plurality of transmit signals is responsive to at least one of the detected phases of the received signals. Each of the generated plurality of transmit signals may be separately amplified to generate a plurality of amplified signals. A plurality of the amplified signals may be input to a plurality of first ports of a multi-port network, wherein at least one second port of the multi-port network may be responsive to signals input to at least two of the plurality of first ports.08-18-2011
20090149137INTEGRATED BIDIRECTIONAL JUNCTION ENGINEERED DUAL INSULATOR TRANSCEIVER - A bi-directional transceiver (06-11-2009
20120142285ANTENNA SWITCHING SYSTEM AND ANTENNA SWITCHING METHOD - According to one embodiment, an antenna switching system includes a (a≧3) antennas and a selector. The selector selects b06-07-2012
20090286491MEMS-based Radio Frequency Circulator - The invention relates to a circulator with at least three ports (p11-19-2009
20090054008MULTIMODE COMMUNICATION APPARATUS - In a multimode communication apparatus that uses a plurality of wireless communication modes, interference between communications under different wireless communication modes is suppressed, a good transmission/reception state in each of the wireless communication modes is ensured. A multimode communication apparatus (02-26-2009
20120295557Wireless Communication Apparatus Having Modulated Tx Clock Spur Control - A wireless telecommunication apparatus comprising—a baseband for the purpose of generating and receiving base-band signals; —a RF transceiver for the purpose of transmitting and receiving a RF signals, —at least one centralized clock derived from at least one central oscillator; —at least one individual element located within said apparatus and having a EMI coupling with said RF transceiver, and which clocking is likely to generate spurs being modulated with the Tx carrier of said RF transceiver; Characterized in that it further includes: —a least one controllable clocking system for said at least one individual element; —a general control unit (UCM) for the purpose of performing a contextual analysis of the current mode of operation of said wireless telecommunications and, in response to said contextual analysis, for determining a clocking frequency which results in modulated Tx clock spurs out of the receive bands.11-22-2012
20100248652RADIO FREQUENCY INTERFACE SWITCHING DEVICE - An exemplary radio frequency interface switching device includes a plurality of signal interfaces, a plurality of switches electrically connected to the signal interfaces, and a switch unit electrically connected to the switches. The signal interfaces are electrically connected with each other by operating different combinations of the switches and the switch unit to receive/send corresponding signals.09-30-2010
20100248651Antenna Matching for MIMO Transceivers - A multiple antenna system is described herein that mitigates the negative effects of mutually coupled antennas on the connected transmitters and/or receivers. The antenna system comprises a directional coupler and two or more antennas. The directional coupler comprises multiple communication ports that each connect to corresponding antenna ports. The connection ports each connect to a different transmitter, receiver, or transceiver. A transmission line connects each antenna port to an antenna. The lengths of the transmission lines and the coupling factor of the directional coupler are selected to decouple the communication ports of the directional coupler. More particularly, the coupling factor and the transmission line lengths are selected so that antenna crosstalk signals caused by mutual coupling between the antennas and the coupled signals produced by the directional coupler have the same magnitude but opposite phase at the communication ports of the directional coupler.09-30-2010
20090291645RF TRANSCEIVER HAVING A T/R SWITCH CIRCUIT WITH HIGH POWER-HANDLING CAPABILITY - A RF transceiver includes an antenna, a receiver, a baseband circuit, a transmitter, and a T/R switch circuit. The T/R switch circuit is used for coupling the antenna and the receiver or coupling the antenna and the transmitter. The T/R switch circuit is coupled to the baseband circuit so as to receive biases provided from the baseband circuit. The T/R switch circuit includes four transistors and a power detector. The power detector detects the power of the output signal of the T/R switch circuit, so that the baseband circuit can adjust biases provided to the T/R switch circuit according to the power of the output signal.11-26-2009
20120295556SIGNAL TRANSCEIVER - A signal transceiver includes a first power amplifier coupled to a chip output port of a chip; an impedance transforming circuit; a switching circuit arranged to selectively couple the chip output port to a first port of the impedance transforming circuit; and a receiving amplifier coupled to a second port of the impedance transforming circuit.11-22-2012
20080233894REDUCTION OF SECOND-ORDER DISTORTION CAUSED BY TRANSMIT SIGNAL LEAKAGE - This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication system. In particular, the disclosure describes techniques for reducing adverse effects of second order distortion of TX signal leakage. To reduce or eliminate second order distortion of transmit signal leakage, a wireless device squares a combined signal that carries both a desired RX signal and a TX leakage signal. For example, the device may include a device that exhibits a strong, second order nonlinearity to, in effect, square the combined signal. The device subtracts the squared signal from the output of the mixer in the receive path, canceling out at least some of the second-order distortion caused by the mixer. In this manner, the device can reduce the adverse effects of second order distortion of TX signal leakage, and thereby enhance or maintain receiver sensitivity.09-25-2008
20100136926Off-line channel tuning amplitude slope matched filter architecture - A tuning control system and associated method is provided for continuously and automatically tuning a lobed amplitude slope matching filter (ASMF) to a band center of an interfering signal to provide improved rejection of an interfering signal coupled from a transmission antenna into a local receive antenna in the presence of local multi-path, thereby Providing improved interference cancellation system performance. The tuning control system is provided as an element of an interference cancellation system.06-03-2010
20100159851Wireless Transmitting/Receiving Device - In a wireless transmitting/receiving device of TDD system etc., a transmission signal is detected on the transmitting side in a specified transmission period, a signal reflected from an antenna through a circulator is detected on the receiving side in the transmission period and a reception signal is detected on the receiving side in a specified reception period. In this case, in a part of the transmission period a transmission signal having been detected on the transmitting side is selected while in the remaining part of the transmission period a reflection signal having been detected on the receiving side through a circulator from an antenna is selected, and in the reception period a reception signal having been detected on the receiving side through the circulator from the antenna is selected and outputted.06-24-2010
20130217344INTEGRATED CIRCUIT AND WIRELESS COMMUNICATION APPARATUS - Provided is an integrated circuit including a first switch element provided on a transmission path, a second switch element provided on a reception path, a third switch element provided between an input-side node of the first switch element and a ground potential, and a fourth switch element provided between an output-side node of the second switch element and the ground potential. The second switch element and the third switch element are turned on when the first switch element and the fourth switch element are turned off. The second switch element and the third switch element are turned off when the first switch element and the fourth switch element are turned on. An output-side node of the first switch element is connected to an input-side node of the second switch element, and a size of the first switch element is smaller than a size of the second switch element.08-22-2013
20090054009MULTI-RADIO WIRELESS COMMUNICATION DEVICE AND METHOD FOR COORDINATING COMMUNICATIONS BETWEEN POTENTIALLY INTERFERING RADIOS - Embodiments of a multi-radio wireless communication device having a Worldwide Interoperability for Microwave Access (WiMax) radio module and a Bluetooth (BT) radio module and methods for communicating are generally described herein. Other embodiments may be described and claimed. In some embodiments, a WiMax active signal is asserted by a coexist controller of the WiMax radio module during receipt of a downlink subframe, and the BT radio module aligns a BT slot boundary of either master-to-slave or slave-to-master slot based on timing information conveyed by the WiMax active signal. The WiMax active signal may be de-asserted by the coexist controller during transmission of an uplink subframe by the WiMax radio module.02-26-2009
20090117859SYSTEM AND METHOD FOR FREQUENCY OFFSETTING OF INFORMATION COMMUNICATED IN MIMO BASED WIRELESS NETWORKS - A communications system includes a multiple-input/multiple-output architecture, which has a plurality of radio frequency chains. One of the plurality of radio frequency chains is configured to apply a first frequency offset to a base frequency of an output signal to generate a first transmitting frequency; and another of the plurality of radio frequency chains being configured to apply a second frequency offset to the base frequency to generate a second transmitting frequency.05-07-2009
20090117858RECEIVE CONFIGURATION ADAPTATION FOR WIRELESS TRANSCEIVERS - An integrated circuit radio transceiver and method therefor is operable to determine an antenna configuration for receive operations. More specifically, the system is operable to determine a receive antenna configuration in a network that includes a number of spatial streams, antenna configuration information, code rate, quadrature modulation type, and transmission protocol modulation scheme, etc. Generally, a selected antenna configuration for transmissions to a remote transceiver is used as an initial antenna configuration for receive operations.05-07-2009
20090247094COMMUNICATION APPARATUS AND COMMUNICATION METHOD, AND COMPUTER PROGRAM THEREFOR - A communication apparatus includes a transmitter for transmitting wireless signals, and a receiver for receiving wireless signals. A first communication functional unit uses the transmitter and the receiver to operate as a station in a first network operating on a first communication channel, while a second communication functional unit uses the transmitter and the receiver to operate as a station in a second network operating on a second communication channel different from that of the first network. A controller conducts time division data transfer by utilizing the respective time periods of receiver inactivity on the first and second channels in order to switch operation to the other channel and attempt to receive a signal on the corresponding other network. In so doing, the communication apparatus is able to fulfill dual roles on the networks operating on different channels with the use of a single modem.10-01-2009
20090215405Transceiver Antennae Arrangement - An apparatus having a transmitter portion and a receiver portion each isolated from each other and comprising a plurality of antennae, each antenna being selectively connectable to both the receiver portion and transmitter portion, said antennae thus being common to both transmitter and receiver. It may be adapted such that one antenna is selectable to be used as a transmitter whilst at the same time an alternative antenna is selectable to be used as a receiving antenna.08-27-2009
20090275295METHOD AND SYSTEM FOR FLIP-CHIP RF FRONT END WITH A SWITCHABLE POWER AMPLIFIER - Methods and systems for a flip-chip RF front end with switchable power amplifier. Aspects of one method may include controlling at least one MEMS switch to allow an on-chip PA and/or an off-chip PA to amplify RF signals for transmission. The MEMS switch may be part of a device package that may be mounted above the flip-chip bonded integrated circuit (IC). Accordingly, various embodiments of the invention may enable controlling of switches to amplify the RF signals via the on-chip RF PA, and the off-chip PA may be bypassed if there is an off-chip RF PA. Various embodiments of the invention may enable controlling the switches to amplify the RF signals via an off-chip RF PA and bypassing an on-chip RF PA. Various embodiments of the invention may also enable controlling the switches to amplify the RF signals via an off-chip RF PA and an on-chip RF PA.11-05-2009
20130122830METHOD, APPARATUS AND SYSTEM FOR CONTROLLING DISTRIBUTED ANTENNA SYSTEM - A method for controlling a distributed antenna system includes the following steps. A target propagation delay value is defined according to a transmit/receive transition gap. Propagation delay time of a service antenna unit corresponding to a base station is estimated. The service antenna unit is turned on to perform downlink signal transmission, and the propagation delay time of the service antenna unit is compensated to the target propagation delay value.05-16-2013
20130122831COMMUNICATION SYSTEMS WITH ENHANCED ISOLATION PROVISION AND OPTIMIZED IMPEDANCE MATCHING - A communication system has multiple paths including one or more Tx paths for processing Tx signals and one or more Rx paths for processing Rx signals, one or more PAs coupled respectively to the one or more Tx paths for amplifying the Tx signals, one or more LNAs coupled respectively to the one or more Rx paths for amplifying the Rx signals, one or more Tx filters coupled respectively to the one or more Tx paths for filtering the Tx signals, one or more Rx filters coupled respectively to the one or more Rx paths for filtering the Rx signals, and an antenna comprising multiple feeds coupled to the multiple paths, respectively, to provide physical separation of the multiple paths from each other. Physical separation among the multiple paths and impedance matching provides isolation among the multiple paths, and relaxes rejection considerations on the filters.05-16-2013
20100216413LEAKAGE SUPPRESSING CIRCUIT - A leakage suppressing circuit for a communication device is provided. The leakage suppressing circuit comprises a signal transforming unit having an input for receiving an input signal, a first output and a second output, the signal transforming unit being configured such that the phase of an output signal at the first output is at least substantially the same as or at least substantially opposite to the phase of an output signal at the second output, and the power of the output signal at the first output is at least substantially equal to the power of the output signal at the second output, a first signal directing unit, a second signal directing unit, and a combining unit.08-26-2010
20100216412CONFIGURABLE TRANSCEIVER AND METHODS FOR USE THEREWITH - A configurable radio frequency (RF) transceiver includes a configuration controller that generates at least one mode control signal that indicates an isolation mode, a frequency mode and an antenna mode. An antenna section includes a plurality of antennas and that selects an antenna configuration based on the at least one mode control signal. An isolation section includes a plurality of isolation circuits and that selects an isolation circuit based on the at least one mode control signal. An RF section selects an RF configuration based on the at least one mode control signal. A baseband section selects a baseband configuration based on the at least one mode control signal.08-26-2010
20100227571Antenna switch and radio communication device - An antenna switch selectively connects one of a transmission signal terminal and a reception signal terminal to a common terminal, and includes a plurality of external terminals including the common terminal, the transmission signal terminal, and the reception signal terminal, a semiconductor chip having a plurality of terminals formed therein, and a plurality of bonding wires that connect the external terminals and the plurality of terminals formed in the semiconductor chip. Two bonding wires that are adjacent to each other among the plurality of bonding wires are used as directional couplers.09-09-2010
20100227570ISOLATION TECHNIQUES FOR MULTIPLE CO-LOCATED RADIO MODULES - Isolation techniques for multiple co-located radio modules are disclosed. For example, an apparatus may include an antenna, a first transceiver to communicate wirelessly across a first link, a second transceiver to communicate wirelessly across a second link, a shared antenna structure operative to allow the first transceiver and the second transceiver to share the antenna for simultaneous operations, and an active signal canceller operative to generate a cancellation signal to cancel an interference signal for a radio-frequency coupling channel between the first and second transceivers. Other embodiments are disclosed and claimed.09-09-2010
20100197244Direct coupled radio frequency (RF) transceiver front end - A method and apparatus is disclosed to couple a transmission amplifier and a reception amplifier to a shared medium. An output of the transmission amplifier is directly coupled to an input of the reception amplifier to form a common connection. The transmission amplifier and the reception amplifier may receive a first amplifier bias via the common connection. In response to the first amplifier bias, the transmission amplifier provides a first communication signal to the shared medium and the reception amplifier does not provide a second communication signal from the shared medium. Alternatively, the transmission amplifier and the reception may receive a second amplifier bias via the common connection. In response to the second amplifier bias, the reception amplifier provides the second communication signal from the shared medium and the transmission amplifier does not provide the first communication signal to the shared medium.08-05-2010
20090111391Wireless communication apparatus and system employing the same apparatuses and method for controlling a plurality of the same apparatuses - At least two or more wireless communication apparatuses (04-30-2009
20110237207ADAPTIVE ANTENNA NEUTRALIZATION NETWORK - An adaptive antenna neutralization network (AANN) for neutralizing coupling between a first antenna and a second antenna of a mobile terminal is disclosed. The AANN includes an array of reactive branches. Each of the reactive branches includes a reactive element and an electrically controlled switch with a control input for selectively coupling the reactive element between the first antenna and the second antenna. Also included is a switch driver having an output coupled to the control input of each electrically controlled switch, and a controller having an output for sending control signals to the switch driver to turn on or off individual ones of the electrically controlled switches in response to conditions that indicate a coupling state between the first antenna and the second antenna.09-29-2011
20110111707RF INTEGRATED CIRCUIT WITH ON-CHIP TRANSMIT/RECEIVE SWITCH AND METHODS FOR USE THEREWITH - First and second control signals select either a receive mode or a transmit mode for two RF transceivers, each control signal having a first value when the transmit mode is selected and a second value when the receive mode is selected. First and second transmit/receive switches, each include an on-chip microelectromechanical switch, and each respond to their corresponding control signal to implement either the transmit mode or the receiver mode.05-12-2011
20090036065TRANSMIT/RECEIVE SWITCH - A radio frequency (RF) transmit/receive switch. The transmit/receive switch comprises an impedance matching circuit and a voltage scaling circuit. The impedance matching circuit matches an incoming RF signal to a low noise amplifier and an outgoing RF signal from a power amplifier. The voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier, and the low noise amplifier, attenuates the outgoing RF signal to a scaled signal within a breakdown voltage of a transistor device in the low noise amplifier during transmission of the outgoing RF signal.02-05-2009
20110098009Transceiver System and Method of Using Same - A transceiver is provided for wireless communication. The transceiver can include a bias source, a transformer including a primary side and a secondary side, and a switching device. During a receive mode, the primary side of the transformer is configured to receive a first signal from a first port. During a transmission mode, the primary side is configured to transmit a second signal from a second port. The switching device is configured to couple the first port to the bias source during transmission of the second signal and to couple the second port to the bias source during receipt of the first signal. The bias source can be, for example, ground.04-28-2011
20110076966METHOD FOR DRIVING AN ANTENNA OF A MOBILE DEVICE - A method for driving an antenna of a mobile device, and a mobile device comprising an antenna, a plurality of antenna matching circuits, a selecting unit and a processing unit are described.03-31-2011
20110070844ELECTRONIC APPARATUS AND DATA COMMUNICATION SYSTEM - An electronic apparatus includes a communication module configured to execute a wireless communication in a transmission mode for sending data to a counterpart electronic apparatus or a reception mode for receiving data from a counterpart electronic apparatus, an orientation detector configured to detect orientation of the electronic apparatus, and a communication controller configured to switch between the transmission mode and the reception mode according to the orientation of the electronic apparatus detected by the orientation detector.03-24-2011
20110070843WIRELESS TERMINAL - A wireless terminal includes an antenna which comprises an antenna element and at least one frequency switching circuit to control an operating frequency of the antenna element in accordance with a frequency control signal, a plurality of RF circuits to perform an RF signal processing, an antenna switch to connect the antenna to one of the plurality of RF circuits in accordance with a connection control signal, and a generation unit configured to generate the frequency control signal and the connection control signal in accordance with switching between a plurality of wireless communication systems or switching between transmission and reception.03-24-2011
20120202438SYSTEM AND METHOD OF TRANSISTOR SWITCH BIASING IN A HIGH POWER SEMICONDUCTOR SWITCH - A system and method are provided for biasing transistor switches in a semiconductor based high power switch. Off-state Vgsd biasing for the off transistor switches is based upon acceptable levels of spurious harmonic emissions and linearity.08-09-2012
20090143026System and Method for Adaptive Polarization Diversity Between Closely Spaced Antennas - An electronic device comprises a transceiver and a probe. The transceiver is connected to a first antenna and a second antenna. The first and second antennas are configured to one of transmit and receive radio frequency signals. The first and second antennas are configured to exhibit a polarized diversity. The probe re-establishes the polarized diversity when the polarized diversity has been disrupted.06-04-2009
20110256837COHERENT TRANSCEIVER AND RELATED METHOD OF OPERATION - A transceiver is provided, comprising: a programmable waveform generator configured to generate a base signal, the programmable waveform generator including a controllable waveform generator configured to generate an initial bandwidth signal having an initial frequency bandwidth; a multiple tone generator configured to generate a plurality of tone signals, each tone signal having a different frequency; one or more bandwidth multiplying circuits; and a control circuit a controller configured to control the operation of the controllable waveform generator, the tone generator and the one or more bandwidth multiplying circuits; a transmit port configured to output the base signal; a receive port configured to accept a received signal; a 90-degree splitter configured to receive the base signal and to generate a first split signal at a 0-degree output and a second split signal at a 90-degree output, the first and second split signals being separated by 90 degrees in phase; a first-mixer configured to mix the received signal and the first split signal to generate a quadrature-phase signal; and a second-mixer configured to mix the received signal and the second split signal to generate an in-phase signal.10-20-2011
20120064842Transmitting/Receiving Device and Method for Transmitting Data in a Radio Network - In one embodiment, a method includes receiving an instruction for a transceiver of a device to transmit a first data frame; in response to the instruction, generating a first control signal for a switch to couple the transceiver to a first antenna for transmission of the first data frame by the transceiver via the first antenna; determining whether the transceiver has received within a pre-determined time interval after the transmission of the first data frame a second data frame containing an acknowledgement message confirming successful receipt of the first data frame by another device; and, if the transceiver has not received within the pre-determined time interval after the transmission of the first data frame the second data frame, then generating a second control signal for the switch to couple the transceiver to the second antenna for re-transmission of the first data frame by the transceiver via a second antenna.03-15-2012
20110028104RECEIVER FOR SIGNAL COMMUNICATION SYSTEM WITH DISTURBANCE REJECTION CIRCUIT - A receiver of a signal communication apparatus; the apparatus having a transmitter for transmitting the signals, the receiver for receiving the signals and a galvanically isolated wireless interface interposed between the transmitter and the receiver and having a transmitting antenna and a receiving antenna. The receiver including a disturbance rejection circuit coupled to the receiving antenna and capable of compensating for the parasite currents flowing between the transmitting antenna and the receiving antenna at the potential variations between the input and output of the galvanic isolation interface.02-03-2011
20110076967IMPEDANCE MATCHED LANE REVERSAL SWITCHING SYSTEM - An impedance matched lane reversal switching system including first and second transceiver pairs, each of the pairs including a transmitter connected to a receiver, the output of the transmitter connected to the input of the receiver and to a node, the node of each pair interconnected with a transmission line and a switching circuit for selectively enabling one of the transmitters of one of the transceiver pairs and disabling the other and selectively utilizing one of the receivers of the other of the transceiver pairs and not the other to selectively reverse an egress side and an ingress side of the lane.03-31-2011
20110136446COMBINED INTELLIGENT RECEIVE DIVERSITY (IRD) AND MOBILE TRANSMIT DIVERSITY (MTD) WITH INDEPENDENT ANTENNA SWITCHING FOR UPLINK AND DOWNLINK - Methods and apparatus are provided for allowing a transmitter (Tx) to perform antenna selection independently of a receiver (Rx) in a transceiver supporting both transmit diversity and receive diversity. Certain aspects may utilize a cross switch, which may be used in a parallel or cross configuration, to provide for the independent antenna selection, such that the Rx may maintain the ability to operate on the same antenna as the Tx, on another antenna, or on both antennas for enhanced receive diversity. Furthermore, certain aspects may employ additional switching in the baseband domain in an effort to avoid, or at least reduce, switching glitches in the Rx caused by changing the cross switch configuration. In this manner, the Rx need not re-converge upon antenna switching.06-09-2011
20110136445RFID READER AND METHOD FOR SUPPRESSING TRANSMISSION LEAKAGE SIGNAL THEREOF - Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.06-09-2011
20100035563RF TRANSCEIVER FRONT-END WITH RX/TX ISOLATION - A radio frequency (RF) transceiver front-end includes an antenna, an RF receiver section, an RF transmitter section, a balancing circuit, and a multiple node isolation and coupling circuit. The multiple node isolation and coupling circuit is coupled to the antenna, the RF receiver section, the RF transmitter section, and the balancing circuit. The multiple node isolation and coupling circuit provides an inbound RF signal from the antenna to the RF receiver section and provides an outbound RF signal from the RF transmitter section to the antenna, wherein, by providing an isolating signal to the balancing circuit, the multiple node isolation and coupling circuit substantially isolates the outbound RF signal from the inbound RF signal.02-11-2010
20120309328BROADBAND DISTRIBUTED ANTENNA SYSTEM WITH NON-DUPLEXER ISOLATOR SUB-SYSTEM - Certain aspects and aspects of the present invention are directed to a distributed antenna system having a downlink communication path, an uplink communication path, and a non-duplexer isolator sub-system. The downlink communication path can communicatively couple a transmit antenna to a base station. The uplink communication path can communicatively couple a receive antenna to the base station. In one aspect, the non-duplexer isolator sub-system can be electronically configured for isolating uplink signals traversing the uplink communication path from downlink signals. In another aspect, a non-duplexer isolator sub-system can be configurable in one or more mechanical steps selecting a frequency response. In another aspect, a non-duplexer isolator sub-system can include an active mitigation sub-system.12-06-2012
20100022201APPARATUS AND METHOD FOR REDUCING SELF-INTERFERENCE IN A RADIO SYSTEM - Full duplex radio wireless systems and methods and especially transceivers for full duplex radio wireless systems with reduction of self-interference are described. MIMO (=multiple input multiple output several antennas for output and input) is used within one device with multiple antennas to remove self-interference in a proactive way. For example, a transceiver is described having self-interference suppression, comprising, within one transceiver device: two or more transmitters comprising one or more signal generators for transmitting transmit signals having transmit center frequencies in a selected first subchannel; and one or more receivers having receiver inputs for simultaneously receiving a desired receive signal in a second subchannel and an undesired accumulated interference signal due to said transmitted signals; and at least one of said transmitters also comprising a precompensation circuit that modifies the transmit signals such that said accumulated interference signal at the receiver(s) inputs is reduced.01-28-2010
20120302184COMMUNICATION APPARATUS, COMMUNICATION CONTROL METHOD AND COMMUNICATION CONTROL PROGRAM STORAGE MEDIUM - PURPOSE: To provide a communication apparatus which makes it possible to, when one communication means of a plurality of communication means performs a communication, prevent the occurrences of interference with the communication due to communications performed by the other communication means.11-29-2012
20120302183ANTENNA DIVERSITY APPARATUS - Apparatus for providing antenna diversity for a radio transmitter/receiver (TR) comprising measuring means for measuring relative received signal strengths in a plurality of antennas in a selectable frequency range, means for selecting the selectable frequency range according to a transmission frequency of the TR, and connecting means for connecting the antenna having the greatest received signal strength to the TR. The apparatus may be combined with a plurality of antennas to form a diversity antenna system, for example for use with a personal radio. The antennas may then be disposed spaced apart on the user's body e.g. by being incorporated into a garment.11-29-2012
20120302182WIRELESS CURRENT SENSOR - The invention relates to a wireless current sensor (11-29-2012
20120252375Method and System for Dynamic Selection of a Coexistence Method and Transmit Power Level Based on Calibration Data - Aspects of the invention may comprise a control system in communication with a radio frequency (RF) front-end subsystem. The RF front-end subsystem comprises a plurality of antennas coupled to a plurality of wireless transmitters or receivers. Each of the wireless transmitters or receivers is operable to communicate via one or more of a plurality of wireless interfaces in the communication device. The control system is configured to detect, based on interference data provided by the RF front-end system, potential interference by an interfering one of said plurality of wireless transmitters or receivers with operations of an interfered-with one of said plurality of wireless transmitters or receivers. The control system is further configured to mitigate said detected interference operation by providing calibration data to said interfered-with one or more of said plurality of wireless transmitters or receivers.10-04-2012
20120009887WIRELESS CIRCUITRY WITH REDUCED HARMONIC INTERFERENCE - An electronic device has wireless communications circuitry that includes transmitters and receivers. Antenna structures may be coupled to the transmitters and receivers to support radio-frequency signal transmission and radio-frequency signal reception operations. Switching circuitry such as first and second radio-frequency switches may be used to support multiple communications bands of interest. A low band set of transmitters may be associated with the first switch and a high band set of transmitters may be associated with the second switch. The switches can be configured in real time to switch a desired communications band into use. As transmitted signals at frequency f pass through the switches, harmonics at 01-12-2012
20120009886ARCHITECTURE FOR COEXISTENCE OF MULTIPLE BAND RADIOS - A front end module for use with a first and a second radio frequency transceiver, constituted of: a control circuitry; a first antenna connection port; a second antenna connection port; a filter arranged to substantially attenuate the carrier frequency bandwidth of the second radio frequency transceiver; and a plurality of electronically controlled switches, wherein the control circuitry is arranged to: in the event that the first and second radio frequency transceivers are simultaneously operative, set the plurality of electronically controlled switches to connect the first radio frequency transceiver to one of the first and second antenna connection ports via the filter; and in the event that the first and second radio frequency transceivers are not simultaneously operative, set the plurality of electronically controlled switches to bypass the filter and connect the first radio frequency transceiver to one of the first and second antenna connection ports.01-12-2012
20110165848TRANSMIT-RECEIVE RADIO FREQUENCY FRONT END INTEGRATED CIRCUITS FOR LAPTOP COMPUTER APPLICATIONS - A radio frequency communications system with a first operating frequency band and a second operating frequency band is disclosed. There is a first antenna. A transceiver has a first transmission port, a second transmission port, a first reception port, and a second reception port. In a first front end circuit, a first port is coupled to the antenna, and a second port is coupled to the transceiver. The first front end circuit has a first low noise amplifier, a second low noise amplifier, a first power amplifier, and a second power amplifier. A switching circuit connects the first transmission port, the first reception port, the second transmission port, and the second reception port to the second port of the first front end circuit. The antenna is distant from the transceiver, while the first front end circuit is proximal to the antenna. The first switching circuit is proximal to the transceiver.07-07-2011
20120157011ELECTRONIC SWITCH AND COMMUNICATION DEVICE INCLUDING SUCH A SWITCH - Switch including a terminal of a first type and at least two terminals of a second type, and a number of circuits capable of ensuring exclusive connection of one of the terminals of the second type to the terminal of the first type as a function of a set of control orders wherein the terminal of the first type is connected to a common point by a first circuit; each terminal of the second type is connected to the common point by a second circuit, with each second circuit including a portion that is magnetically coupled to the first circuit, a static switch mounted in parallel with the portion and capable of being controlled in the “off” state in order to connect the terminal of the first type to the terminal of the second type associated with the second circuit in question.06-21-2012
20090130992Antenna co-location in portable devices for simultaneous receive and transmit - Systems and methods are disclosed for the co-location of radio frequency (RF) antennas in portable devices, portable devices and their docking stations and related systems, and devices with restrictive space constraints to allow for simultaneous receive (RX) and transmit (TX) operation without degradation. The systems and methods disclosed overcome RX channel degradation, receiver performance, and other problems seen in prior solutions. More particularly, transmit and receive antennas are oriented to provide for cross-polarization of their electro-magnetic fields, are oriented to allow one or both antenna to fall within null regions of the other antenna, and/or oriented with both cross-polarization and null region considerations in mind. Other variations and implementations are also described.05-21-2009
20090130991METHOD AND SYSTEM FOR LNA ADJUSTMENT TO COMPENSATE FOR DYNAMIC IMPEDANCE MATCHING - Aspects of a method and system for LNA adjustment to compensate for dynamic impedance matching are provided. In this regard, an antenna matching network may be configured to maximize received signal strength for a determined frequency and an amplifier gain may be adjusted based on the maximized signal strength such that output levels of the amplifier are between specified limits. The antenna matching network may be programmatically controlled via one or more switching elements. The amplifier gain may be programmatically controlled via one or more bias points. The antenna matching network may be configured for a plurality of frequencies in a frequency band, such as an FM broadcast band, and a configuration for each frequency may be stored. Accordingly, when the receiver is tuned to a frequency, a corresponding configuration may be retrieved from memory.05-21-2009
20120129472MOBILE WIRELESS COMMUNICATIONS DEVICE WITH HUMAN INTERFACE DIVERSITY ANTENNA AND RELATED METHODS - A mobile wireless communications device may include a portable handheld housing, and a wireless transceiver carried by the housing. A pair of an antennas are positioned in side-by-side relation preferably in the upper portion of the portable handheld housing. A human interface diversity controller is connected to the wireless transceiver to preferentially operate with the plurality of antennas based upon a relative position of the portable handheld housing with respect to a hand of a human user. The device can select or weight the antennas based upon the position of the device when being held by a user.05-24-2012
20120129471WIRELESS COMMUNICATION APPARATUS - According to one embodiment, a wireless communication apparatus includes a wireless unit and a control unit. The wireless unit is configured to set, for each period, a transmit state including a first period for transmitting a connection request to establish connection or a receive state including a second period for receiving a connection request and to transmit or receive a signal, both lengths of the first period and the second period being equal. The control unit is configured to control the wireless unit to operate in one of a transmit mode, a receive mode and a transceive mode. The control unit causes the wireless unit to operate in the receive mode or the transceive mode before a trigger signal is externally input, and to operate in the transmit mode if the trigger signal is input.05-24-2012
20120214428Predistortion Device, Method for Predistortion, and Transmitter/Receiver System - The embodiments of the present invention provide a predistortion device, method for predistortion and transmitter/receiver system. The predistortion device comprises a predistortion unit, and the predistortion device further comprises: a signal acquiring unit to process the output signals of a transmitting circuit to obtain distorted signals; a signal coupling unit to couple the distorted signals acquired by the signal acquiring unit to the receiving signals inputted to a receiving circuit; and a signal processing unit to decouple the output signals of the receiving circuit to acquire the distorted signals and the receiving signals. With the embodiments of the present invention, an analog receiving circuit may be reused in a half duplexing system and a full duplexing system, and the requirement on the analog receiving circuit is lowered, thereby reducing the cost.08-23-2012
20120171969Apparatus For Coupling A Wireless Communication Device To A Physical Device - A wireless communication device may be configured to transmit and receive data through a physical device, such as a cable. Relatively higher transmit radio frequency (RF) signals from the wireless communication device may be shifted to a relatively lower frequency, thereby enabling the relatively lower frequency signals to be carried by the physical device. Similarly, relatively lower frequency signals from the physical device may be shifted to relatively higher frequencies, thereby enabling the wireless communication device to receive the signals from the physical device. In one embodiment, the frequency of the RF signals may be between 2.3 and 2.7 GHz and the frequency of the relatively lower frequency shifted signals may be between 900 and 1100 MHz.07-05-2012
20120171968DUAL MODE TRANSCEIVER - A circuit is disclosed with an external coupling port for coupling to an external antenna, for example. The circuit has an FDD receive path including a narrowband passband filter. The circuit has a TDD receive path bypassing the narrowband passband filter but relying on a same amplifier. The circuit also has an FDD transmit path including a narrowband passband filter. The circuit has a TDD transmit path bypassing the narrowband passband filter of the FDD transmit path but relying on a same transmit amplifier. A switching configuration allows the circuit to operate in TDD mode, alternating between the TDD receive path and the TDD transmit path and in the FDD mode wherein the FDD transmit and receive paths are simultaneously coupled to the external coupling port.07-05-2012
20100048146Transceiver with Compensation for Transmit Signal Leakage and Method Therefor - A transceiver (02-25-2010
20120178385APPARATUS AND METHOD FOR PROCESSING VOICE COMMUNICATION IN MOBILE TERMINAL - A device and method process voice communication service. A mobile terminal device of the present disclosure includes a microphone arranged at one end of a body of the device; a speaker arranged close to the microphone; a transceiver arranged at the other end of the body; a codec including a coder connected to the microphone, a decoder connected to the speaker, and a switch of which one node is connected to one of the coder and the decoder selectively and the other node is connected to the transceiver; and a communication controller which controls the switch to establish a path between the coder and the transceiver and enables the speaker in speakerphone mode.07-12-2012
20090061791Diversity control method - A diversity control method of selecting a plurality of antennas having directivities and disposed in different directions is disclosed. At least two antennas are selected from the plurality of antennas. First diversity control of comparing strengths of reception powers of the selected at least two antennas is performed. One antenna having a stronger reception power than others is selected. If the radio conditions of at least two antennas have deteriorated in the first diversity control, second diversity control of comparing radio conditions of at least two antennas is performed in a predetermined period and at least one of the antennas is changed to another new antenna based on a compared result.03-05-2009
20120190312RADIO ANTENNA SWITCH - A radio antenna switch module for a high frequency radio transceiver enables the radio transceiver to have a small number of receivers and transmitters and a larger number of antennas, whereby each antenna has a different diversity characteristic. The diversity between antennas provide for greater communication reliability, while the small number of receivers and transmitters allows the transceiver to operate at relatively low power compared to conventional radio transceivers. The switch module also allows for two loopback modes between the transmitter and the receiver for at-speed, low-cost self-test in production.07-26-2012
20090017776RADIO RECEIVER CIRCUIT, RADIO TRANSCEIVER CIRCUIT AND CALIBRATION METHOD THEREOF - Conventional digital calibration type analog-to-digital converters cannot converge calibration within an preamble period of a packet signal. An analog-to-digital converter is subjected to digital calibration using a beacon signal, a polling signal, or another user signal or a signal applied from a transceiver side to a receiver side. Some or all of circuits are brought into a sleep mode in a period except data reception and the analog-to-digital converter calibration such that a signal monitor unit detects another signal to activate the circuit in the sleep mode for performing the calibration of the analog-to-digital converter for reducing the power consumption.01-15-2009
20090017775Radio front end with resonant transmit/receive switch - A device having a radio front end is provided. The radio front end includes an inductor having a first end and a second end. A capacitor having a first end and a second end is connected to the second end of the inductor. An antenna is connected to the second end of the inductor and the second end of the capacitor. A first switch is connected to the first end of the inductor and the first end of the capacitor, wherein the inductor and capacitor form a resonant circuit when the first switch is closed. A second switch is connected to the resonant circuit, the second switch connecting the resonant circuit to ground through a low impedance when the first switch is closed. A third switch is connected to a transmit power amplifier connecting the transmit power amplifier to ground through a low impedance when the first switch is closed.01-15-2009
20120231751RADIO COMMUNICATION TERMINAL - A mobile communication terminal (09-13-2012
20110003563Radio Frequency Front End Circuit with Antenna Diversity for Multipath Mitigation - A front end circuit for selectively coupling a first antenna and a second antenna to a transmit chain and a receive chain of a radio frequency (RF) transceiver is disclosed. There is a first power amplifier having an input connectible to the transmit chain of the RF transceiver, a first low noise amplifier having an output connectible to the receive chain of the RF transceiver, and a second low noise amplifier with an input connectible to the second antenna, as well as an output connectible to the receive chain of the RF transceiver. A first matching and switch network is connected to the first antenna, the output of the first power amplifier, and the input of the first low noise amplifier. Transmit signals from the first power amplifier and receive signals from the first antenna are selectively passed to the first antenna and the first low noise amplifier.01-06-2011
20110039504MATCHING CIRCUIT FOR ADAPTIVE IMPEDANCE MATCHING IN RADIO - An impedance matching circuit for a radio receives antenna signals and has its matching elements, such as capacitors, progressively switched into the circuit, with the matching element configuration resulting in the highest RSSI being subsequently used until a succeeding test or antenna impedance change. The effect of the matching circuit is accounted for in the transmitter calibration routine so that the matching circuit works for both half duplex and full duplex.02-17-2011
20110045786APPARATUS AND METHOD FOR SWITCHING FROM RECEPTION TO TRANSMISSION - The invention is related to an apparatus comprising: at least one definition unit configured to define signal characterizing parameters of a transmission; and at least one routing unit configured to route the transmission to at least one transmission path based on the signal characterizing parameters, the at least one transmission path arranged to convey the transmission to at least one antenna.02-24-2011
20100203843RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH DIRECT CURRENT BIAS SWITCH - 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.08-12-2010
20120289172ARRAY ANTENNA SYSTEM - A method for an antenna system including a transmitting phase array antenna including a transmitting antenna subarray including a number of antenna elements transmitting on a first frequency and a receiving phase array antenna including a receiving antenna subarray including a number of antenna elements. The transmitting antenna subarray antenna is positioned at a distance relative the receiving antenna subarray antenna and the coupling between two antenna subarrays are decided and used for controlling the transmitting subarray antenna to transmit in such a way that there will be nulling of the energy in the receiving antenna subarray antenna with respect to the transmitting antenna subarray.11-15-2012
20100178879RF POWER MODULE - A technique is provided for achieving reduction in size of an electronic device with a power amplifier circuit, while enhancing the performance of the electronic device. An RF power module for a mobile communication device includes first and second semiconductor chips, a passive component, and first and second integrated passive components, which are mounted over a wiring board. In the first semiconductor chip, MISFET elements constituting power amplifier circuits for the GSM 900 and for the DCS 1800 are formed, and a control circuit is also formed. In the first integrated passive component, a low pass filter circuit for the GSM 900 is formed, and in the second integrated passive component, a low pass filter circuit for the DCS 1800 is formed. In the second semiconductor chip, antenna switch circuits for the GSM 900 and DCS 1800 are formed. Over the upper surface of the wiring board, the second semiconductor chip is disposed next to the first semiconductor chip between the integrated passive components.07-15-2010
20100167665Enhanced error correction performance - The exemplary embodiments of this invention relate in part to an apparatus that includes an error correction function and a controller configured to receive radio access scheduling information in response to a scheduling request sent to a multiradio controller. The controller is responsive to the radio access scheduling information containing an indication of a time when during a scheduling interval reception is blocked for a receiver of the apparatus, due at least in part to simultaneously scheduled operation of a transmitter, to send information to the error correction function for marking as erased any symbols received during a time that the reception is indicated to be blocked. The exemplary embodiments of this invention may be realized at least in part in a software defined radio platform that includes the multiradio controller and a plurality of radio access units.07-01-2010
20120149313APPARATUS AND METHOD FOR IMPROVING RSE PERFORMANCE OF MULTI-STANDBY TERMINAL - An apparatus and method for improving Radiated Spurious Emission (RSE) performance of a multi-standby terminal supporting 306-14-2012
20110136444Transmit and receive antenna - A transmit/receive antenna for transmission and reception of electromagnetic signals. The transmit/receive antenna comprises a TX section and an RX section, where the TX section comprises a magnetically coupled TX element and a TX input terminal and the RX section comprises at least one magnetically coupled RX element and has an RX output terminal. Axes of the TX loop element and the at least one magnetically coupled RX solenoid element are parallel. Moreover, the at least one magnetically coupled RX element is positioned to provide high isolation at the RX terminal of the antenna from TX electrical signals fed to the TX input. Specifically, the at least one magnetically coupled RX element is positioned at a so that the net magnetic flux generated by the TX loop element and threading the RX solenoid element is zero.06-09-2011
20110159823RF Front-end Circuit and Wireless Communication Device Using the Same - The present invention discloses an RF front-end circuit for a wireless communication device, which includes an RF terminal coupled to an antenna of the wireless communication device, for receiving or transmitting wireless signals; and a switch for connecting a plurality of processing modules to the RF terminal according to operations of the wireless communication device.06-30-2011
20110159822SEMICONDUCTOR SWITCH AND WIRELESS DEVICE - According to one embodiment, a semiconductor switch includes a voltage generator, a voltage controller, a driver, and a switch unit. The voltage generator generates a negative first potential. The voltage controller controls the first potential according to a terminal switch signal input from an outside. The driver is input the terminal switch signal, and outputs at least one selected from the first potential and the second potential based on the terminal switch signal. The second potential is a power supply voltage or is higher than the power supply voltage. The switch unit is provided on an SOT substrate, switches a connection between an anntena terminal and any one of high frequency terminals based on the output of the driver.06-30-2011
20080248759Apparatus For Coupling A Wireless Communication Device To A Physical Device - A wireless communication device may be configured to transmit and receive data through a physical device, such as a cable. Relatively higher transmit radio frequency (RF) signals from the wireless communication device may be shifted to a relatively lower frequency, thereby enabling the relatively lower frequency signals to be carried by the physical device. Similarly, relatively lower frequency signals from the physical device may be shifted to relatively higher frequencies, thereby enabling the wireless communication device to receive the signals from the physical device. In one embodiment, the frequency of the RF signals may be between 2.3 and 2.7 GHz and the frequency of the relatively lower frequency shifted signals may be between 900 and 1100 MHz.10-09-2008
20080227409WIRELESS RECEIVER WITH NOTCH FILTER TO REDUCE EFFECTS OF TRANSMIT SIGNAL LEAKAGE - This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communication device. The notch filter may be constructed as a complex notch filter using passive resistor and capacitor components to produce a notch frequency that attenuates TX signal leakage components in a desired signal. The notch filter may be applied to a down-converted, baseband signal produced by a passive mixer.09-18-2008
20130171948MULTI-FREQUENCY BAND ANTENNA FEEDER SHARING METHOD AND BASE STATION RADIO FREQUENCY UNIT - Embodiments of the present disclosure provide a multi-frequency band antenna feeder sharing method and a base station radio frequency unit. The method includes: receiving a signal of a frequency band 1 and a signal of a frequency band 2 through an antenna feeder, transmitting the signals to a band-pass filter and filtering the signals so as to obtain the signal of the frequency band 2, and transmitting the signal of the frequency band 2 to a third radio frequency port through a combiner port; and/or, sending the signal of the frequency band 2 to the combiner port through the third radio frequency port, transmitting the signal of the frequency band 2 that has passed through the band-pass filter to the port of the first radio frequency channel, and sending out the signal of the frequency band 2, together with the signal of the frequency band 1.07-04-2013
20130178173APPARATUS AND METHOD FOR MINIMIZING AMPLIFIER OSCILLATION IN AN ANTENNA SYSTEM - Embodiments of an apparatus for minimizing oscillation of an amplifier in an antenna system are provided. These embodiments can comprise passive circuitry in the form of a coupling simulator that includes passive elements selected and combined to generate an output with properties that can cancel or substantially reduce a coupled input as between two antennas in the antenna system. In one example, the coupling simulator may include a phase-shifting device and an attenuating device, each of which have properties with values selected based on parameters that result from the relationship between the antennas of the antenna system.07-11-2013
20110269412Selective Push-to-Talk - A push-to-talk (PTT) switch with biasing to a first center position in which in which the PTT function of neither one of up to two audio devices is engaged, also having a first operated position to which the switch may be moved by hand operation to cause the PTT function of the first one of the two audio devices to be engaged, and further having a second operated position to which the switch may be moved by hand operation to cause the PTT function of the second one of the two audio devices to be engaged.11-03-2011
20110269411Connection-Responsive Push-to-Talk - Apparatus and method to monitor the coupling of one or two audio devices and to augment the function of a PTT switch to causes the PTT function of one audio device to be engaged regardless of which of the two operated positions into which the switch is moved in response to there being only the one audio device coupled to the apparatus and in response to the one audio device being a radio, to cause the PTT function of either one of two audio devices to be selected to be engaged depending on which operated position to which the PTT switch is moved in response to there being only one audio device in the form of an intercom system (ICS) coupled to the apparatus with the other audio device in the form of a radio being coupled through the ICS, and to allow the PTT to be used to select the PTT function of either one of two audio devices to be engaged in response to there being two audio devices in the form of radios coupled to the apparatus.11-03-2011
20130102261METHOD FOR CALIBRATING A BAND REJECTION FILTER OF A TERMINAL AND MULTISTANDARD TERMINAL WITH CALIBRATED BAND REJECTION FILTER - The present invention relates to a multimedia mobile terminal capable of transmitting and receiving signals compliant with several standards in the UHF band. It comprises: 04-25-2013
20130130631WIRELESS COMMUNICATION DEVICE FOR SWITCHING ANTENNAS - A wireless communication device comprises a first antenna, a second antenna, a switch, and a balun. The first antenna and the second antenna transmit and receive signals. The wireless communication device can use only one antenna (the first antenna) or the two antennas (the first antenna and the second antenna) at the same time according to a comparison between received signal strength indications (RSSIs) of the antennas and a maximum input level of the wireless communication device.05-23-2013
20130149975System and methods for performing antenna transmit diversity - A wireless electronic device may include switching circuits that perform time division duplexing by toggling between a first configuration in which radio-frequency signals received from antennas are routed to the transceivers and a second configuration in which the antennas are coupled to antenna switching circuitry. The antenna switching circuitry may receive radio-frequency transmission signals from the transceivers and route the transmission signals to a selected one of the antennas. The antenna switching circuitry may be controlled by control circuitry such as baseband circuitry and/or storage and processing circuitry on the device. The antenna switching circuitry may be controlled to accommodate antenna transmit diversity without affecting reception of radio-frequency signals, because the switching circuits that perform time division duplexing may form signal reception paths that are unaffected by the configuration of the antenna switching circuitry.06-13-2013
20130095774METHOD FOR SELECTING STATE OF A RECONFIGURABLE ANTENNA IN A COMMUNICATION SYSTEM VIA MACHINE LEARNING - A method for selecting the state of a reconfigurable antenna installed at either the receiver or transmitter of a communication system is provided. The proposed method uses online learning algorithm based on the theory of multi-armed bandit to perform antenna state selection. The selection technique utilizes the Post-Processing Signal-to-Noise Ratio (PPSNR) as a reward metric and maximizes the long-term average reward over time. The performance of the learning based selection technique is empirically evaluated using wireless channel data. The data is collected in an indoor environment using a 2×2 MIMO OFDM system employing highly directional metamaterial Reconfigurable Leaky Wave Antennas. the learning based selection technique shows performance improvements in terms of average PPSNR and regret over conventional heuristic policies.04-18-2013
20130137385TRANSCEIVER WITH PLURAL SPACE HOPPING ARRAY ANTENNAS AND METHODS FOR USE THEREWITH - A wireless transceiver includes an antenna array that transmits an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the antenna array is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the antenna array to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected one of the antennas in the array to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna in the array.05-30-2013
20130137384COMMUNICATION SYSTEM WITH BAND, MODE, IMPEDANCE AND LINEARIZATION SELF-ADJUSTMENT - A communication system is provided, including an antenna, a PA, a linearization circuit to enhance linearity, a filter system, and a controller. The controller is configured to receive information on the signals and conditions, and based on the information the controller controls one or more of the antenna, the PA, the linearization circuit and the filter system to provide an optimum configuration to meet specifications of signal properties under the conditions. The controller may look up a registry having entries regarding the specifications of signal properties under conditions in terms of predetermined parameters.05-30-2013
20130157591RF Transceiver - A signal generation and transmission system includes a modulator and an RF transceiver. The RF transceiver includes a voltage-controlled oscillator, a power divider, a low-pass filter, a low-noise amplifier and a mixer. The voltage-controlled oscillator receives a signal from the modulator and produces a frequency modulated continuous wave signal. The power divider receives the frequency modulated continuous wave signal from the voltage-controlled oscillator. The low-pass filter receives the frequency modulated continuous wave signal from the power divider. The low-noise amplifier receives, amplifies and transfers a target echo signal. The mixer combines the frequency modulated continuous wave signal from the power divider with the echo signal of target from the low-noise amplifier so that the two signals are added up or subtracted from each other in a frequency band.06-20-2013
20130157592Methods for Reducing Near-Field Radiation and Specific Absorption Rate (SAR) Values in Communications Devices - A method is provided for reducing near-field radiation and specific absorption rate values in a communications device that includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure. The method includes adjusting the relative phase between signals fed to neighboring antenna ports of the antenna structure such that a signal fed to the one antenna port has a different phase than a signal fed to the neighboring antenna port to provide antenna pattern control and to increase gain in a selected direction toward a receive point. The method features using a transmit power lower than the transmit power used in a non-pattern control operation of the antenna structure such that the communications device obtains generally equivalent wireless link performance with the receive point using reduced transmit power compared to the non-pattern control operation, thereby reducing the specific absorption rate.06-20-2013
20130183911CONFIGURABLE ANTENNA STRUCTURE - A configurable antenna structure includes a plurality of switches, a plurality of antenna components, and a configuration module. The configuration module is operable to configure the plurality of switches and the plurality of antenna components into a first antenna for receiving a multiple frequency band multiple standard (MFBMS) signal. The configuration module continues processing by identify a signal component of interest of a plurality of signal components of interest within the MFBMS signal. The configuration module continues processing by configuring the plurality of switches and the plurality of antenna components into a second antenna.07-18-2013
20130115897FILTER BLOCK AND A SIGNAL TRANSCEIVER COMPRISING SUCH A FILTER BLOCK - A filter block comprising 05-09-2013
20110319038METHOD AND APPARATUS FOR CONTROLLING MULTI BAND ANTENNA IN MOBILE COMMUNICATION TERMINAL - An apparatus and method for controlling a multi-band antenna in a mobile communication terminal are provided. An apparatus for controlling a multi-band antenna in a mobile communication terminal includes a modem, an antenna unit, a Radio Frequency (RF) processing unit, and a switch module. The modem outputs at least one control signal corresponding to a target frequency band. The antenna unit changes a resonance frequency of the antenna according to the at least one control signal. The RF processing unit includes a plurality of transmission/reception (TX/RX) paths and processes TX/RX signals. The switch module connects the antenna to one of the TX/RX paths according to the at least one control signal.12-29-2011
20130196609Process for Achieving Spur Mitigation in an Integrated Circuit Including a Wide Band Receiver - A radio transceiver including—an antenna (08-01-2013
20120058736Transceiver Front-End - A transceiver front-end provides an interface between a transmission medium and transmitter, and between a transmission medium and receiver. The transceiver front-end includes a hybrid circuit, a high-pass filter, and a gain stage, that permits the reduction or the complete elimination of buffer amplifiers. Buffer amplifiers can be eliminated because the hybrid circuit and/or the high-pass filter are adapted so that they can be directly connected to each other, without a loss in circuit performance. Furthermore, the high-pass filter and/or the gain stage are also adapted so they can be directly connected. As such, the transceiver front-end can be constructed using all passive components, reducing or eliminating excess heat generation.03-08-2012
20120064841CONFIGURING ANTENNA ARRAYS OF MOBILE WIRELESS DEVICES USING MOTION SENSORS - A device and method for the real-time motion detection and reconfiguration of an antenna array of a mobile wireless device is described. The mobile wireless device includes an antenna array for receiving and transmitting wireless signals, a motion sensor coupled to the antenna array, and a first circuitry coupled to the antenna array and the motion sensor. A change in orientation of the antenna array is detected by the motion sensor in real time and recognized by the first circuitry. The antenna array is reconfigured by the first circuitry in response to the detected change in orientation in an expeditious manner.03-15-2012
20120094617MODULE FOR MOBILE COMMUNICATION TERMINAL, AND MOBILE COMMUNICATION TERMINAL - A tunable filter in a tunable DPX module has frequency characteristics, and thus needs to be controlled with high accuracy so as to simultaneously cancel a transmission signal and noise in a reception band on a transmission side. For this reason, a canceller includes a filter having the same frequency characteristic as that of a tunable filter, and a structure having functions of compensating for an amplitude, a phase, and a delay. And, two lines of the cancellers are used to individually cancel a leak component of a transmission signal and a leak component of thermal noise in a reception band. In order to save the power consumption of the amplifier, a coupler is loosely coupled, and a combiner is tightly coupled. Further, in order to suppress the influence on a reception system due to the tough coupling, the combiner uses the amplifier for in-phase inputs.04-19-2012
20130210374ANTENNA DUPLEXER AND COMMUNICATION DEVICE USING THE SAME - An antenna duplexer includes a transmission filter and a reception filter both coupled with an antenna terminal. A pass band of the transmission filter is lower than a pass band of the reception filter. The transmission filter includes a first series resonator coupled with a first terminal, a second series resonator connected to the first series resonator at a first node, a first parallel resonator connected to a first port of the first series resonator, a second parallel resonator connected to a first node and the first parallel resonator at a second node, a third parallel resonator connected to the first node, a fourth parallel resonator connected to the third parallel resonator at a third node, a first inductance element coupled with the second node and a ground, and a second inductance element coupled with the third node and the ground. The inductance of the second inductance element is lower than the inductance of the first inductance element. In this antenna duplexer, the transmission filter sufficiently suppresses a spurious caused by harmonics contained in a transmission signal.08-15-2013

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